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Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
Hi All,
I purchased these water meters in bulk with a bunch of friends who also have salt water tanks. We have a few left over and I thought I am offering them to diffrent group members at a discounted price. The JBJ model of this meter sells for $100+. We are looking to sell them for $60. It's a 3 in 1 hand held digital thermometer, salinity, and specific gravity meter. Take a look at the pictures on the link below. http://i70.photobucket.com/albums/i1...k/Meter006.jpg Here are the Specifics: Its a 3 in 1 meter Thermometer 0~100 degrees F Specific Gravity 1.000~1.032 Salinity 5ppt~40ppt Automatic Temp. Compensation Includes calibration fluid, an extra set of batteries, instructions, and a box to keep it in. It has definitely helped me to save time maintaining my tank. Let me know if you're interested, and email me with any questions or comments to . Thanks, J |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
"Wayne Sallee" wrote in message ...
Interesting e-mail address. What is "interesting" about that e-mail @ qmail, Wayne ?? Haven't you hear about http://gmail.google.com/ before ?? It is obvious that this post is not factual. Why would such thing be "obvious" based on this e-mail address ?? |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
Don't anyone be buying this meter, you will not be happy. The electronic scale system
built into the meter is a mess. I wrote the manufacture months ago on how to fix it with all the tech data and proof they would need and no reply -- Boomer If You See Me Running You Better Catch-Up Former US Army Bomb Technician (EOD) Member; IABTI, NATEODA, WEODF, ISEE & IPS Want to talk chemistry ? The Reef Chemistry Forum http://www.reefcentral.com/vbulletin/index.php Want to See More ! The Coral Realm http://www.coralrealm.com "Pszemol" wrote in message ... : "Wayne Sallee" wrote in message ... : Interesting e-mail address. : : What is "interesting" about that e-mail @ qmail, Wayne ?? : Haven't you hear about http://gmail.google.com/ before ?? : : It is obvious that this post is not factual. : : Why would such thing be "obvious" based on this e-mail address ?? |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
"Boomer" wrote on Tue, 22 Aug 2006:
Don't anyone be buying this meter, you will not be happy. The electronic scale system built into the meter is a mess. I wrote the manufacture months ago on how to fix it with all the tech data and proof they would need and no reply I happened to get one of those about six months ago. The salinity meter doesn't seem to stay calibrated. I measure my tank about once a month, and I need to recalibrate it almost every time. Can you tell me what specific errors you noticed with the device? How did you suggest that they fix it? -- Don __________________________________________________ _____________________________ Don Geddis http://reef.geddis.org/ |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
This was my e-mail
This meter is going to be way off. Seawater is not NaCl, it is seawater. Calibration solutions need to be 53 mS= 35 ppt NSW salinity. A 35 ppt NaCl Salinity calibration solution will only yield a seawater Salinity of 32.5 ppt NSW Salinity. That means that if one takes your meter and it reads 35 ppt it is off around +2 points low = about 32.5 ppt NSW so it needs to read 37.5. This is a nice toy you have but needs some fixing, same with those tables. Furthermore, your table is a NSW Density table, set to 59 F. Density DOES NOT = SG. SG is roughly 1 unit higher, meaning D = 1.023, then SG = 1.024. I have a Excel spread sheet program that lets me calculate such tables, based on seawater stds. And all this depends on what the SG meter is calibrated to. The std solution of a meter for testing seawater is, 32.4536 g/Kg, which = 53,065 uS @25C or 53 mS. If it is for SG it is different, if it is for a refract it is different. The only solution that meets all NSW readings, be it conductivity @53,065 uS (53mS), @ 1.0269 SG, Refract @ 3.5% or 35 ppt is a real std seawater solution. Such solutions are available only in one place and cost about $$$ for a 5 l bottle http://www.seawater.com The std equation of state for seawater is K15 = Conductivity of seawater sample / conductivity of std KCl solution @ 15 C 1 ATM and the KCl being at 32.4356gkg S = 0.0080 - .1692 K15 exp 1/2 + 25.3851 K15 + 14.0941 K15 exp 3/2 - 7.0261 K15 ² + 2.7081 K15 exp 5/2 If the conductivity of the sample is 53, 065 uS and it is the same for the KCL, then K15 =1. If you plug that 1 into the equation it = 35 ppt Have them look at these http://www.start.or.th/got/data/techsupp/pss78.htm http://www.es.flinders.edu.au/~matto...lecture03.html http://gaea.es.flinders.edu.au/~matt...es/salcon.html Reef Aquarium Salinity: Homemade Calibration Standards http://reefkeeping.com/issues/2004-06/rhf/index.htm -- Boomer If You See Me Running You Better Catch-Up Former US Army Bomb Technician (EOD) Member; IABTI, NATEODA, WEODF, ISEE & IPS Want to talk chemistry ? The Reef Chemistry Forum http://www.reefcentral.com/vbulletin/index.php Want to See More ! The Coral Realm http://www.coralrealm.com |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
What is wrong with my email address Wayne? You can email me, and I will
reply. J Wayne Sallee wrote: Interesting e-mail address. It is obvious that this post is not factual. Wayne Sallee Wayne's Pets pricetank wrote on 8/22/2006 3:53 PM: Hi All, I purchased these water meters in bulk with a bunch of friends who also have salt water tanks. We have a few left over and I thought I am offering them to diffrent group members at a discounted price. The JBJ model of this meter sells for $100+. We are looking to sell them for $60. It's a 3 in 1 hand held digital thermometer, salinity, and specific gravity meter. Take a look at the pictures on the link below. http://i70.photobucket.com/albums/i1...k/Meter006.jpg Here are the Specifics: Its a 3 in 1 meter Thermometer 0~100 degrees F Specific Gravity 1.000~1.032 Salinity 5ppt~40ppt Automatic Temp. Compensation Includes calibration fluid, an extra set of batteries, instructions, and a box to keep it in. It has definitely helped me to save time maintaining my tank. Let me know if you're interested, and email me with any questions or comments to . Thanks, J |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
Hi Boomer,
It is strange that you have not heard back from the manufacture. Where did you get your meter from? We had a problem with one of the meters in the group. We returned it, and got it replaced with a new one pretty quickly. I use this meter only now. I live near a huge LFS that is very popular for deliveries. They use it in all their tanks now. I have heard some problems here and there with this meter but for the most part people have been pretty happy with this meter. Sounds like maybe you recieved a bad one. I have only had to calibrate mine every month or so. J Boomer wrote: Don't anyone be buying this meter, you will not be happy. The electronic scale system built into the meter is a mess. I wrote the manufacture months ago on how to fix it with all the tech data and proof they would need and no reply -- Boomer If You See Me Running You Better Catch-Up Former US Army Bomb Technician (EOD) Member; IABTI, NATEODA, WEODF, ISEE & IPS Want to talk chemistry ? The Reef Chemistry Forum http://www.reefcentral.com/vbulletin/index.php Want to See More ! The Coral Realm http://www.coralrealm.com "Pszemol" wrote in message ... : "Wayne Sallee" wrote in message ... : Interesting e-mail address. : : What is "interesting" about that e-mail @ qmail, Wayne ?? : Haven't you hear about http://gmail.google.com/ before ?? : : It is obvious that this post is not factual. : : Why would such thing be "obvious" based on this e-mail address ?? |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/SalinityMeter
Yes I am familiar with gmail. In fact I also have a gmail
e-mail address. But look at the name before the ". Also do a goole search for that e-mail address, both on groups, and web. Wayne Sallee Wayne's Pets Pszemol wrote on 8/22/2006 8:02 PM: "Wayne Sallee" wrote in message ... Interesting e-mail address. What is "interesting" about that e-mail @ qmail, Wayne ?? Haven't you hear about http://gmail.google.com/ before ?? It is obvious that this post is not factual. Why would such thing be "obvious" based on this e-mail address ?? |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
"Wayne Sallee" wrote in message ...
Yes I am familiar with gmail. In fact I also have a gmail e-mail address. But look at the name before the ". Also do a goole search for that e-mail address, both on groups, and web. So what exactly are you getting from these searches ? |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
I never had a meter, a guy on our chem from was asking about one. I looked at the
instruction manual and its operation. The meter is calibrated using table salt. Table salt is not seawater when dealing with EC meters. Density is also not SG. That table may be a NaCl SG or a NaCl density table. It is not a seawater table of any kind. Their 5-40 ppt is not seawater salinity it is NaCl or table salt salinity and they are not the same. When the meter is calibrated by their means, 35ppt on their meter is not 35 ppt NSW but 33. 5 NSW . The Sg on that meter is also useless. You calibrate that meter ? With what, table salt, correct, NaCl , that is not = to the salt in seawater buy a long shot. Well they may not be happy if they knew there salinity and SG is low. Is it that far off, no but it is not doing as claimed. You can fix that meter if you want . Get a PinPoint 53 mS calibration solution and adjust the meter so it reads 35 ppt....fixed. That SG will still be useless. You should be able to see that if you flip the switch to SG once calibrated correctly to NSW. I will not say 1.026 NSW SG Boomer If You See Me Running You Better Catch-Up Former US Army Bomb Technician (EOD) Member; IABTI, NATEODA, WEODF, ISEE & IPS Want to talk chemistry ? The Reef Chemistry Forum http://www.reefcentral.com/vbulletin/index.php Want to See More ! The Coral Realm http://www.coralrealm.com "pricetank" wrote in message oups.com... : Hi Boomer, : : It is strange that you have not heard back from the manufacture. Where : did you get your meter from? We had a problem with one of the meters in : the group. We returned it, and got it replaced with a new one pretty : quickly. : : I use this meter only now. I live near a huge LFS that is very popular : for deliveries. They use it in all their tanks now. I have heard some : problems here and there with this meter but for the most part people : have been pretty happy with this meter. Sounds like maybe you recieved : a bad one. I have only had to calibrate mine every month or so. : : J : : Boomer wrote: : Don't anyone be buying this meter, you will not be happy. The electronic scale system : built into the meter is a mess. I wrote the manufacture months ago on how to fix it with : all the tech data and proof they would need and no reply : : -- : Boomer : : If You See Me Running You Better Catch-Up : : Former US Army Bomb Technician (EOD) : Member; IABTI, NATEODA, WEODF, ISEE & IPS : : Want to talk chemistry ? The Reef Chemistry Forum : http://www.reefcentral.com/vbulletin/index.php : : Want to See More ! The Coral Realm : http://www.coralrealm.com : : : : "Pszemol" wrote in message ... : : "Wayne Sallee" wrote in message : ... : : Interesting e-mail address. : : : : What is "interesting" about that e-mail @ qmail, Wayne ?? : : Haven't you hear about http://gmail.google.com/ before ?? : : : : It is obvious that this post is not factual. : : : : Why would such thing be "obvious" based on this e-mail address ?? : |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
Well Wayne, if it is not real then why is that gmail name pricetank taken ? Did you think
about going to gmail and looking. He said e-mail him what are you afraid of.? Jump the gun again ? -- Boomer If You See Me Running You Better Catch-Up Former US Army Bomb Technician (EOD) Member; IABTI, NATEODA, WEODF, ISEE & IPS Want to talk chemistry ? The Reef Chemistry Forum http://www.reefcentral.com/vbulletin/index.php Want to See More ! The Coral Realm http://www.coralrealm.com "Wayne Sallee" wrote in message ... : Yes I am familiar with gmail. In fact I also have a gmail : e-mail address. But look at the name before the ". : : Also do a goole search for that e-mail address, both on : groups, and web. : : Wayne Sallee : Wayne's Pets : : : : Pszemol wrote on 8/22/2006 8:02 PM: : "Wayne Sallee" wrote in message : ... : Interesting e-mail address. : : What is "interesting" about that e-mail @ qmail, Wayne ?? : Haven't you hear about http://gmail.google.com/ before ?? : : It is obvious that this post is not factual. : : Why would such thing be "obvious" based on this e-mail address ?? |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
"Boomer" wrote in message ...
You can fix that meter if you want . Get a PinPoint 53 mS calibration solution and adjust the meter so it reads 35 ppt....fixed. That SG will still be useless. You should be able to see that if you flip the switch to SG once calibrated correctly to NSW. I will not say 1.026 NSW SG So you can fix this meter by using 53mS calibration solution and set 35ppt or 1.026 on the meter - whatever reading you prefer on your daily routine. BTW - most reflectometers sold for this hobby have also the scale calibrated to NaCl not sea water... are they useless in your opinion? I would deem meter as useless if I would not be able to calibrate it. If every measurement would read different, random value... I a meter has a constant offsest and I know what offset it is, (33 instead of 35ppt) than what is the big deal ? I do not get it. |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
"So you can fix this meter by using 53mS calibration solution and
set 35ppt or 1.026 on the meter - whatever reading you prefer on your daily routine." 53mS yes, Sg 1.026 no.The meter is trying to make a preset electronic conversion based on NaCl.to the density or SG. They do not tell you which one it is. You would have to have a seawater sample with a know SG of 1.026 then you could set it to Sg and the ppt would be off "BTW - most reflectometers sold for this hobby have also the scale calibrated to NaCl not sea water... What is a reflectometer, there is no such thing :-).........refractometer. Yes, BTW, you learned that from me, just like this meter This is not a refract but a EC meter, big difference. Not all refract's are off just so you know. The so called blue refracts, the most common in this hobby, happen to be right on based on tests. Didn't know that did you ? That is because they are off from the factory for a NaCl solution, which by luck ends up being right on to NSW. "I would deem meter as useless if I would not be able to calibrate it. If every measurement would read different, random value..." That is something you won't know unless you test it. Your logic makes about as much sense as saying you have a pH meter and it can only be calibrated to work from 7.8-8.2 pH, 9 no deal, 6 no deal..... buy it anyway. "I a meter has a constant offsets and I know what offset it is, (33 instead of 35ppt) than what is the big deal ? I do not get it." The offset is not constant throughout its scale. EC meters do not use a constant scale when converting the value uS to ppt or TDS. The scaling is non-linear. The non-linear scale being used is dependant on what TDS value you are using, NaCl, KCl, 442, Seawater, alcohol, surgar, brix, etc. The meter would have to be set to a seawater scaling to convert from uS to ppt. If the meter measured the value only in uS or mS there would be no issue. That is why there is a company that makes a EC meter in uS, ppt, Sg for seawater to the tune of almost $600. To do all of this correctly you need multipoint calibration points. When I buy some meter of any kind, for a function, I expect it to read what it should. For the price and what it gives and the issues it has yes, IMHO useless. I could find a PinPoint for that price. The company could make the corrections to this meter and for its cost would be a very nice meter. I would want one. Many people say SeaTests swing arms are also useless.......so are they....... Boomer If You See Me Running You Better Catch-Up Former US Army Bomb Technician (EOD) Member; IABTI, NATEODA, WEODF, ISEE & IPS Want to talk chemistry ? The Reef Chemistry Forum http://www.reefcentral.com/vbulletin/index.php Want to See More ! The Coral Realm http://www.coralrealm.com "Pszemol" wrote in message ... : "Boomer" wrote in message ... : You can fix that meter if you want . Get a PinPoint 53 mS : calibration solution and adjust the meter so it reads 35 ppt....fixed. : That SG will still be useless. You should be able to see that if : you flip the switch to SG once calibrated correctly to NSW. : I will not say 1.026 NSW SG : : So you can fix this meter by using 53mS calibration solution and : set 35ppt or 1.026 on the meter - whatever reading you prefer on : your daily routine. : : BTW - most reflectometers sold for this hobby have also the scale : calibrated to NaCl not sea water... are they useless in your opinion? : : I would deem meter as useless if I would not be able to calibrate it. : If every measurement would read different, random value... : : I a meter has a constant offsest and I know what offset it is, : (33 instead of 35ppt) than what is the big deal ? I do not get it. |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
"Boomer" wrote in message ...
"So you can fix this meter by using 53mS calibration solution and set 35ppt or 1.026 on the meter - whatever reading you prefer on your daily routine." 53mS yes, Sg 1.026 no.The meter is trying to make a preset electronic conversion based on NaCl.to the density or SG. They do not tell you which one it is. You would have to have a seawater sample with a know SG of 1.026 then you could set it to Sg and the ppt would be off I am affraid you did not understand my point... If you can properly calibrate the meter using 53mS Pinpoint solution on a ppt setting to match 35ppt than with the same solution you can calibrate it on the SG setting turning the screw to get 1.026 reading. Is this correct or not ? If it is, than you can calibrate the meter TO ONE SETTING and do not switch it later. You just pick whatever unit your prefer in your routine. One aquarist may prefer maitaining the tank to 35ppt, other to 1.025 :-) "BTW - most reflectometers sold for this hobby have also the scale calibrated to NaCl not sea water... What is a reflectometer, there is no such thing :-).........refractometer. Yes, BTW, you learned that from me, just like this meter Why so important is it for you to point out a typo, or from whom somebody learn something ? Focus on the subject... please. This is not a refract but a EC meter, big difference. Not in this conversation subject. We were discussing how insignificants are constant offsets you can always subtract from the final reading... Not all refract's are off just so you know. The so called blue refracts, the most common in this hobby, happen to be right on based on tests. Didn't know that did you ? That is because they are off from the factory for a NaCl solution, which by luck ends up being right on to NSW. The point is, that most of them (except blue one) show values also calibrated for NaCl, and this does not stop aquarists from using them... So what is the problem with this Digi Mate ? "I would deem meter as useless if I would not be able to calibrate it. If every measurement would read different, random value..." That is something you won't know unless you test it. Your logic makes about as much sense as saying you have a pH meter and it can only be calibrated to work from 7.8-8.2 pH, 9 no deal, 6 no deal..... buy it anyway. I do not understand above... We read here that the meter is stable after calibration, that it requires calibration about once a month, which is reasonable. That readings are repeatable... On top of it, a reef tank needs constant salinity, so I do not care that the offset vary in a wide range of the meter scale - I talk about using this meter for reef tank. Knowing that it is calibrated to NaCl you can apply constant offset to the reading, exactly as for the refractometer, or calibrate it with 53mS Pinpoint solution TO ONE UNIT only and stick with calibrated meter. If you calibrate it to 35ppt using Pinpoint, and then measure 35ppt in your reef tank it will simply mean your reef tank has proper water salinity. If you measure less or more than 35ppt then you adjust salinity. Do you agree with above ? The offset is not constant throughout its scale. EC meters do not use a constant scale when converting the value uS to ppt or TDS. The scaling is non-linear. So we eliminate the problem by not switching between SG and TDS - we stick with calibrated 35 ppt and within close range around 35ppt (where the reef tank should be) the offset will be constant. The non-linear scale being used is dependant on what TDS value you are using, NaCl, KCl, 442, Seawater, alcohol, surgar, brix, etc. The meter would have to be set to a seawater scaling to convert from uS to ppt. If the meter measured the value only in uS or mS there would be no issue. That is why there is a company that makes a EC meter in uS, ppt, Sg for seawater to the tune of almost $600. To do all of this correctly you need multipoint calibration points. You do not need this kind of meter for a reef tank. You most likely use it with some laboratory environment... When I buy some meter of any kind, for a function, I expect it to read what it should. When I buy some cheap meter for a application I expect it to work withing application. So if you assume you cannot get a better meter for $60 for a reef tank, than what is this whole fuss about ? It works great for a reef tank! For the price and what it gives and the issues it has yes, IMHO useless. I could find a PinPoint for that price. The company could make the corrections to this meter and for its cost would be a very nice meter. I would want one. How Pinpoint meter is better ? And where you can get it new for $60 ? Many people say SeaTests swing arms are also useless.......so are they....... I like swing arms :-) I do not need anything better for a reef tank salinity. |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
"Pszemol" wrote in
: "Boomer" wrote in message ... "So you can fix this meter by using 53mS calibration solution and set 35ppt or 1.026 on the meter - whatever reading you prefer on your daily routine." 53mS yes, Sg 1.026 no.The meter is trying to make a preset electronic conversion based on NaCl.to the density or SG. They do not tell you which one it is. You would have to have a seawater sample with a know SG of 1.026 then you could set it to Sg and the ppt would be off I am affraid you did not understand my point... If you can properly calibrate the meter using 53mS Pinpoint solution on a ppt setting to match 35ppt than with the same solution you can calibrate it on the SG setting turning the screw to get 1.026 reading. Is this correct or not ? Sure, but would you reasonably call such a thing a "3 in 1 meter" if you never intended to use one of the settings..? Is it a good product, if you need to recalibrate for one or another measurement, every time you want to change your mode of usage? If it is, than you can calibrate the meter TO ONE SETTING and do not switch it later. You just pick whatever unit your prefer in your routine. One aquarist may prefer maitaining the tank to 35ppt, other to 1.025 :-) I think Boomer's only point was that it is disingenuous to NOT make note of the disparity in results in the product's documentation... that can lead to mis-use by the consumer (incorrect adjustment of salinity). And, its maybe also a bit wrong to call it a "3 in 1 meter", from a certain point of view... "BTW - most reflectometers sold for this hobby have also the scale calibrated to NaCl not sea water... What is a reflectometer, there is no such thing :-).........refractometer. Yes, BTW, you learned that from me, just like this meter Why so important is it for you to point out a typo, or from whom somebody learn something ? Focus on the subject... please. We all concern ourselves with spelling at one time or another... http://groups.google.com/group/rec.a...g/df9ee392447b 953a Right, "Pzemol"? (Sorry, I couldn't resist... ;-) DaveZ Atom Weaver |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
"I am affraid you did not understand my point..."
I understand your point quite well. It is you not understanding the point . Do you have a owners manual, I do. "If you can properly calibrate the meter using 53mS Pinpoint solution on a ppt setting to match 35ppt than with the same solution you can calibrate it on the SG setting turning the screw to get 1.026 reading." It is not an SG scale, how many times do I have to say that. I just looked at again, it is a Density scale not an SG scale and density does not = SG...try to pay attention :-) Density an SG are also not really linear. They claim it is a true seawater SG and it is not.... get it. They also claim it will accurately measure seawater salinity and that is false advertising. The also claim it was made for NSW and synthetic seawater, so you are grossly being mislead. That makes me wonder what else may be wrong with this meter. Can you turn the screw, OK there Psezmol what is the density ( NOT SG) of seawater @ 79 F at 33 ppt. I'll give you a day or two to tell me that. Could you turn the screw to just get a reading of 1.026 ? Sure. . Do you have allot of time. Each time you switch from ppt to SG you must wait 10 sec, when you switch back you must wait another 10 sec. That means each tweak of the screw is going to take 20 sec. Now why am I telling you this ? Per instructions it is only suppose to be calibrated in the ppt mode. Meaning, that when in the SG mode the cal screw may do anything. You would have to write the manufacture or we could ask the guy here selling them. If you can turn the screw great BUT should one try to cal it that way ? All you are doing is guessing, to try and defend the sale or use of a poorly done meter. Not my cup of tea. I'm tired of people in this hobby getting ripped-off or getting bogus info. I guess that is Ok with you . "Focus on the subject... please." The only one not focusing on the subject is you . It was you that brought up refracts, so try to stay focused on the subject, as you claim. The subject is EC meters "So what is the problem with this Digi Mate ?" Let me repeat myself again. It was designed, is sold and advertised as meter to accurately measure seawater and synthetic seawater. It does not do that. Refracts in this hobby are not designed and don't make claims to accurately measure and give the SG of seawater. They are just salinity refracts, NaCl "I do not understand above... " You could you not understand that ? Let me try to be more simple then. Buying this meter is like buying a pH meter where the meter only works if the pH is between 7.7-8.2 but you bought the meter assuming it worked throughout the pH range. In your mind this is just fine a ducky so have at it. I do not know of anyone that would do that and this is the same issue with this meter .. When people go out and buy something in this hobby, they assume it is accurate or fairly accurate. They do not go out and buy things assuming the are not accurate and off. Maybe you do....This meter as advertised is way off. "If you calibrate it to 35ppt using Pinpoint, and then measure 35ppt in your reef tank it will simply mean your reef tank has proper water salinity" Yes, at that value. What if someone has other tanks, a FOT at 29 ppt a Red Sea tank at 40 ppt then what. Do you know what the offset it is. I already told you it is not linear, as it is a conversion of uS to ppt NaCl and uS to ppt NSW is not the same. So what, suppose to recal for each ? They could have easily done this with this meter for seawater at no extra cost. It could have run a full range of NSW salinity, within reason. Why not ? That is what I tried to tell them. I was hoping I would get back a reply like the new model would be fixed. It would be a very nice meter. "So we eliminate the problem by not switching between SG and TDS - we stick with calibrated 35 ppt and within close range around 35ppt (where the reef tank should be) "the offset will be constant" Please READ the above again. This is a EC meter NOT a refract. It is NOT measuring uS but giving TDS by conversion from uS. This meter will not be constant, accept in a narrow range and that is not what the meter is suppose to do. It is suppose to be a full range meter, that is what you paid for. If the meter gave only uS the it would be constant.....get it. Do you even actually now what TDS /ppt really is in meters. ? That is why allot of us do not like TDS meters, it does not give a "real" value of TDS, it is a crude approximation of TDS. Meters should just be left as uS or mS, no mis-reading, no confusion or guessing. Meters do not have a clue what the TDS is. It is measuring conductivity, the reciprocal of ohms and trying to convert it into a weight measurement. The meter/s, that have TDS/ppt, have a pre-programmed curve. That curve is for one solution ( unless it is multipoint meter), i.e., NaCl, KCl, Alcohol, Seawater, etc. The conversion of uS to ppt//TDS at 30 ppt is not the same as it is at 35 ppt, it is non-linear. So, the pre-programmed curve is made non-linear for that specific solution so it is more accurate at its "guess" of TDS. "You do not need this kind of meter for a reef tank." Who the hell said they did wake up and go back and re-read my post on what they could have done "How Pinpoint meter is better ?" Their meter does not measure TDS/ppt but mS it is not converting anything to TDS/ppt "And where you can get it new for $60 ?" I have seen 1 or 2 on e-bay "I like swing arms :-) I do not need anything better for a reef tank salinity" And so do I and you and I always seem to be defending them. The whole point here Pszemol is the meter does not work well at all out of the box and it is not a SG scale in the meter but a Density.scale . Yes, one can get it to work within most reef tank ppt, say 33-37 with a 53 mS cal solution. Would I recommend to buy on, no, a refract has allot much lees pain and are cheaper with allot less error and dicking around this meter has. With all the dicking around needed for that meter to me it is useless. When Randy took a look at it he had the same opinion as me. If one already has the meter then I would do my best to make it work better, reason I gave the 53 mS solution for re-calibration it. Finally, something you do not know. This meter does not come with a 35 ppt NaCl calibration solution but 30 ppt, which means more headaches for those that have them and don't know about EC meters.You would have thought they would have had a least a half a brain and used a 35 ppt NaCl solution, which would have less error. I find amusing that you or anyone is trying to defend a meter with all its countless problems, offsets and errors. -- Boomer If You See Me Running You Better Catch-Up Former US Army Bomb Technician (EOD) Member; IABTI, NATEODA, WEODF, ISEE & IPS Want to talk chemistry ? The Reef Chemistry Forum http://www.reefcentral.com/vbulletin/index.php Want to See More ! The Coral Realm http://www.coralrealm.com "Pszemol" wrote in message ... : "Boomer" wrote in message ... : "So you can fix this meter by using 53mS calibration solution and : set 35ppt or 1.026 on the meter - whatever reading you prefer on : your daily routine." : : 53mS yes, Sg 1.026 no.The meter is trying to make a preset electronic conversion based on : NaCl.to the density or SG. They do not tell you which one it is. You would have to have a : seawater sample with a know SG of 1.026 then you could set it to Sg and the ppt would be : off : : I am affraid you did not understand my point... : : If you can properly calibrate the meter using 53mS Pinpoint solution : on a ppt setting to match 35ppt than with the same solution you can : calibrate it on the SG setting turning the screw to get 1.026 reading. : : Is this correct or not ? : : If it is, than you can calibrate the meter TO ONE SETTING and do not : switch it later. You just pick whatever unit your prefer in your routine. : One aquarist may prefer maitaining the tank to 35ppt, other to 1.025 :-) : : "BTW - most reflectometers sold for this hobby have also the scale : calibrated to NaCl not sea water... : : What is a reflectometer, there is no such thing :-).........refractometer. : : Yes, BTW, you learned that from me, just like this meter : : Why so important is it for you to point out a typo, : or from whom somebody learn something ? : Focus on the subject... please. : : This is not a refract but a EC meter, big difference. : : Not in this conversation subject. : We were discussing how insignificants are constant offsets : you can always subtract from the final reading... : : Not all refract's are off just so you know. : The so called blue refracts, the most common in this hobby, happen to be right : on based on tests. Didn't know that did you ? That is because they are off from the : factory for a NaCl solution, which by luck ends up being right on to NSW. : : The point is, that most of them (except blue one) show values : also calibrated for NaCl, and this does not stop aquarists : from using them... So what is the problem with this Digi Mate ? : : "I would deem meter as useless if I would not be able to calibrate it. : If every measurement would read different, random value..." : : That is something you won't know unless you test it. : Your logic makes about as much sense as saying you have : a pH meter and it can only be calibrated to work from 7.8-8.2 pH, : 9 no deal, 6 no deal..... buy it anyway. : : I do not understand above... : We read here that the meter is stable after calibration, : that it requires calibration about once a month, which : is reasonable. That readings are repeatable... : On top of it, a reef tank needs constant salinity, so : I do not care that the offset vary in a wide range of : the meter scale - I talk about using this meter for reef tank. : : Knowing that it is calibrated to NaCl you can apply constant : offset to the reading, exactly as for the refractometer, : or calibrate it with 53mS Pinpoint solution TO ONE UNIT only : and stick with calibrated meter. : If you calibrate it to 35ppt using Pinpoint, and then measure : 35ppt in your reef tank it will simply mean your reef tank : has proper water salinity. : If you measure less or more than 35ppt then you adjust salinity. : : Do you agree with above ? : : The offset is not constant throughout its scale. : EC meters do not use a constant scale : when converting the value uS to ppt or TDS. : The scaling is non-linear. : : So we eliminate the problem by not switching between : SG and TDS - we stick with calibrated 35 ppt and within : close range around 35ppt (where the reef tank should be) : the offset will be constant. : : The non-linear : scale being used is dependant on what TDS value you are using, NaCl, KCl, 442, Seawater, : alcohol, surgar, brix, etc. The meter would have to be set to a seawater scaling to : convert from uS to ppt. If the meter measured the value only in uS or mS there would be : no issue. That is why there is a company that makes a EC meter in uS, ppt, Sg for : seawater to the tune of almost $600. To do all of this correctly you need multipoint : calibration points. : : You do not need this kind of meter for a reef tank. : You most likely use it with some laboratory environment... : : When I buy some meter of any kind, for a function, I expect it to read what it should. : : When I buy some cheap meter for a application I expect it to work withing application. : So if you assume you cannot get a better meter for $60 for a reef tank, : than what is this whole fuss about ? It works great for a reef tank! : : For the price and what it gives and the issues it has yes, IMHO useless. : I could find a PinPoint for that price. The company could make : the corrections to this meter and for its cost would be a very nice meter. : I would want one. : : How Pinpoint meter is better ? : And where you can get it new for $60 ? : : Many people say SeaTests swing arms are also useless.......so are they....... : : I like swing arms :-) I do not need anything better for a reef tank salinity. |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/SalinityMeter
I did not say that it was not real.
Wayne Sallee Wayne's Pets Boomer wrote on 8/24/2006 10:13 PM: Well Wayne, if it is not real then why is that gmail name pricetank taken ? Did you think about going to gmail and looking. He said e-mail him what are you afraid of.? Jump the gun again ? |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
"It is obvious that this post is not factual."
What is not factual. I agree with Pszemol. His e-mail address tells you nothing. You said do a search on it. Implying it can not be found anywhere. That is a direct imply it is not real. You said look at the name before @gmail, another imply it is fake . What is fake about Princetank or not factual, as Pszemol and I would like to know. If you screwed up Wayne just say so, we all make mistakes here. The worst thing one can do when they screw up and they know it, is to try find a ways to spin something so it looks otherwise. That does not add credulity, it takes it away. We have done this allot on this NG in the last year, me included. I'm tired of it. I will not reply to this post or my last one to Pszemol. I'm tired of all the arguing here and spinning. All one has to do is scroll down this NG, it is quite evident all the arguing going on, where someone needs to over and over try to cram their POV down someone's throat. It is one of the reasons so many people leave this NG. I will make this last comment on this thread The merit or credibility of a post lies within it contents. A person reading these posts can decide for themselves who is credible or not. Ask yourself the question, what was the reasoning behind your comment ?....I see none. There was no need for it even if it was fake. And more meaningless arguing because of it. It is not debating but arguing. And by far you get the grand prize. And look who is arguing now, carrying on this thread more :-)...... so I'll shut-up -- Boomer If You See Me Running You Better Catch-Up Former US Army Bomb Technician (EOD) Member; IABTI, NATEODA, WEODF, ISEE & IPS Want to talk chemistry ? The Reef Chemistry Forum http://www.reefcentral.com/vbulletin/index.php Want to See More ! The Coral Realm http://www.coralrealm.com "Wayne Sallee" wrote in message ... :I did not say that it was not real. : : Wayne Sallee : Wayne's Pets : : : : Boomer wrote on 8/24/2006 10:13 PM: : Well Wayne, if it is not real then why is that gmail name pricetank taken ? Did you think : about going to gmail and looking. He said e-mail him what are you afraid of.? Jump the : gun again ? : |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/SalinityMeter
I was referring to the idea that this person says that he
bought a quantity with his friends and had a few left over when the reality looks to be that he is buying and selling many items, and pretending to be just a hobbyist with a few extra items. Wayne Sallee Wayne's Pets Boomer wrote on 8/25/2006 2:57 PM: "It is obvious that this post is not factual." What is not factual. I agree with Pszemol. His e-mail address tells you nothing. You said do a search on it. Implying it can not be found anywhere. That is a direct imply it is not real. You said look at the name before @gmail, another imply it is fake . What is fake about Princetank or not factual, as Pszemol and I would like to know. If you screwed up Wayne just say so, we all make mistakes here. The worst thing one can do when they screw up and they know it, is to try find a ways to spin something so it looks otherwise. That does not add credulity, it takes it away. We have done this allot on this NG in the last year, me included. I'm tired of it. I will not reply to this post or my last one to Pszemol. I'm tired of all the arguing here and spinning. All one has to do is scroll down this NG, it is quite evident all the arguing going on, where someone needs to over and over try to cram their POV down someone's throat. It is one of the reasons so many people leave this NG. I will make this last comment on this thread The merit or credibility of a post lies within it contents. A person reading these posts can decide for themselves who is credible or not. Ask yourself the question, what was the reasoning behind your comment ?....I see none. There was no need for it even if it was fake. And more meaningless arguing because of it. It is not debating but arguing. And by far you get the grand prize. And look who is arguing now, carrying on this thread more :-)...... so I'll shut-up |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
Wow, this thread has gotten out of hand. I don't know where to start or
if I even should. I was just trying to offer something that normally sells for way to much money at LFS for an already expensive hobby. This is the only item we have and yes, I am a hobbyist. Our club buys in bulk and usually sells off the rest of what we have. Last time we got PH meters but didnt have to buy as many as we did for these meters. Regardless of what others have said here, this meter does work and has been tested against other methods. If you are already use to using a refractometer or hydrometer and are already set in your ways about it, so be it. A lot of big LFS in my area (who ship) use the meter as well to test all their tanks. It is not killing their livestock to use this meter. It saves time and headache over the other methods and allows you spend a few extra minutes enjoying your hobby. Jeremy Wayne Sallee wrote: I was referring to the idea that this person says that he bought a quantity with his friends and had a few left over when the reality looks to be that he is buying and selling many items, and pretending to be just a hobbyist with a few extra items. Wayne Sallee Wayne's Pets Boomer wrote on 8/25/2006 2:57 PM: "It is obvious that this post is not factual." What is not factual. I agree with Pszemol. His e-mail address tells you nothing. You said do a search on it. Implying it can not be found anywhere. That is a direct imply it is not real. You said look at the name before @gmail, another imply it is fake . What is fake about Princetank or not factual, as Pszemol and I would like to know. If you screwed up Wayne just say so, we all make mistakes here. The worst thing one can do when they screw up and they know it, is to try find a ways to spin something so it looks otherwise. That does not add credulity, it takes it away. We have done this allot on this NG in the last year, me included. I'm tired of it. I will not reply to this post or my last one to Pszemol. I'm tired of all the arguing here and spinning. All one has to do is scroll down this NG, it is quite evident all the arguing going on, where someone needs to over and over try to cram their POV down someone's throat. It is one of the reasons so many people leave this NG. I will make this last comment on this thread The merit or credibility of a post lies within it contents. A person reading these posts can decide for themselves who is credible or not. Ask yourself the question, what was the reasoning behind your comment ?....I see none. There was no need for it even if it was fake. And more meaningless arguing because of it. It is not debating but arguing. And by far you get the grand prize. And look who is arguing now, carrying on this thread more :-)...... so I'll shut-up |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/SalinityMeter
Pszemol wrote on 8/24/2006 5:11 PM: "Wayne Sallee" wrote in message ... Yes I am familiar with gmail. In fact I also have a gmail e-mail address. But look at the name before the ". Also do a goole search for that e-mail address, both on groups, and web. So what exactly are you getting from these searches ? This is one of them: http://cgi.ebay.com/DigiMateTemperat...QQcmdZViewItem If you do a google search now, it won't show up, also there were a number of other items for sale earlier. Wayne Sallee Wayne's Pets |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
"Wayne Sallee" wrote in message ink.net...
This is one of them: http://cgi.ebay.com/DigiMateTemperat...QQcmdZViewItem If you do a google search now, it won't show up, also there were a number of other items for sale earlier. Lets talk fish, Wayne, ok ? |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/SalinityMeter
LOL silly, we are talking fish.
Wayne Sallee Wayne's Pets Pszemol wrote on 8/26/2006 7:23 PM: "Wayne Sallee" wrote in message ink.net... This is one of them: http://cgi.ebay.com/DigiMateTemperat...QQcmdZViewItem If you do a google search now, it won't show up, also there were a number of other items for sale earlier. Lets talk fish, Wayne, ok ? |
Digi Mate 3in1 Meter Temperature/ Specific Gravity Meter/Salinity Meter
"pricetank" wrote in message ups.com... Hi All, I purchased these water meters in bulk with a bunch of friends who also have salt water tanks. We have a few left over and I thought I am offering them to diffrent group members at a discounted price. The JBJ model of this meter sells for $100+. We are looking to sell them for $60. It's a 3 in 1 hand held digital thermometer, salinity, and specific gravity meter. Take a look at the pictures on the link below. http://i70.photobucket.com/albums/i1...k/Meter006.jpg FWIW I have one of these meters and after reading all of this thread I started to doubt the meters accuracy, so I went out a bought a refractometer and guess what in every test that I have done they both give exactly the same readings. so they have ether fixed the calibration error or it is not a problem in the real world. Go ahead and buy one, you will not be disappointed. (as long as you stay away from news groups) that is. -- Posted via a free Usenet account from http://www.teranews.com |
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