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- Lab Grade Conductivity/Salinity Probe - Neptune Systems
Salinity / Conductivity Probe – Lab Grade
Start measuring salinity in your tank and get alerts when it is out of range.
- Replace an old probe
- Add salinity monitoring to your system via the Salinity Module: PM2
Start measuring salinity in your tank and get alerts when it is out of range.
- Replace an old probe
- Add salinity monitoring to your system via the Salinity Module: PM2
*Calibration solutions sold separately
Use 53.0mS calibration fluid for monitoring salinity of saltwater
Use 447mS calibration fluid for monitoring TDS of freshwater
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Trash By Peter Pan on 3/2/2019
Peter Pan wouldn't recommend this product to a friendWill not calibrate, Will not give you accurate results, -
Decent Probe But Can Be Tough To Calibrate By Richard on 2/16/2019
Richard would recommend this product to a friendI've owned several of these and they've each had a useful life of about 12 months. I replace when readings begin to change erratically despite cleaning and re-calibration, or probe fails to recalibrate altogether. Expensive 'relative to pH probes, etc.'? Yes, but I have no idea what the relative manufacturing costs might be for this type probe vs. the others. Reliable? Mine certainly have been and always read within 0.1 - 0.2 ppm of my VEE GEE STX-3 Refractometer (awesome refractometer by-the-way!). Easy to re-calibration this probe? No. Sometimes it takes 2 to 3 attempts to get probe to read within .1 ppm of calibration solution's concentration. But eventually I get it and all is well. I use the output from this probe as a quick salinity check at least once every single day and the Apex sends me a text & email anytime the salinity drifts more than +/- .3 ppm. If that happens, I know there's either something going on with my ATO or the probe needs cleaning / re-calibration or replacement. As far as I'm concerned this is a perishable item with a relatively high price tag - but one that provides a lot of peace-of-mind in return. -
P.O.S. Brand New won’t calibrate By AH on 12/21/2018
AH wouldn't recommend this product to a friendI just bought the new system. Plug in the salinity probe and the Apex gives me a reading of 41 without any calibration. I cant get passed step 4 ( the dry calibration) to use the calibration fluid because it has an unacceptably dry rating of 41. WTH???
Ble -
Need non Neptune brand By Drew on 11/27/2018
Drew wouldn't recommend this product to a friendThis probe came with my apex, worked for 2 months, now it always reads between 48 and 50. Wish BRS would make a Conductivity probe. -
I would give it zero stars! By Advayananda on 11/4/2018
Advayananda wouldn't recommend this product to a friendthis thing absolutely does not work! It can not be calibrated at all. stay away! I would give it zero stars if i could . total waste of money! -
Failed By Chuckles on 10/13/2018
Chuckles wouldn't recommend this product to a friendSix months exactly and it goes flat line literally, reads zero, cleaned it shook it no bubbles. ________________ like this_________ flat line dead -
Reef aquariums are not labs By Mark on 9/29/2018
Mark wouldn't recommend this product to a friendThese things only work in perfect environments, and that doesn't even include calibration within a little bag. Took me several times to try and get it to sync. Got it close and gave up. I can't even say that their calibration fluid is even accurate. I thought i was going to be smart and calibrate my refractometer only to find that using their fluid my RODI was now 1.010! The calibration fluid probably just one of the reason why this probe isn't worth bringing home.Over the past week or so i think it had the correct reading for maybe an hour or two. it's currently ready 1.032 and has been as low as 1.017 :( -
Don't buy it By miguel on 9/10/2018
miguel wouldn't recommend this product to a friendStop working 6 months after installing it. Says 0 all the time. -
7mo By Ryan on 8/27/2018
Ryan wouldn't recommend this product to a friendOverall it works pretty good for me for about 7 months to tell me when my sanity was starting to get more out of line. But you had to put it at a 20 degree angle or the bubbles in the sump will greatly disrupt the reading. It also died after 7 months. -
sorry people its not worth the money By stan on 4/30/2018
stan wouldn't recommend this product to a friendI have had 3 of the probes sometimes they work right and sometimes they don't most of the time they don't I calibrate and at first they are dead on with my aquarium salinity at 35 ppt but then after days go it will either slowly go up or down to extremes like going to 32ppt and back up to 38ppt lol and this all with the temp staying the same Im down buying these probes -
Lasts a bit over a year By Keith on 1/29/2018
Keith would recommend this product to a friendI'm on my second probe (soon to be 3rd) in about 5 years. My experience it this probe is stable and useful, until it isn't. Things start growing inside it and a soak in vinegar and a recalibration usually fixes the problem. However, after a year or so of this it seems to stop being reliable. If you account for that when purchasing this - then you can decide if the probe is worthwhile. -
Terrible Quality, High Price By Nick on 12/4/2017
Nick wouldn't recommend this product to a friendAbout 6 months in and for no reason it stopped working. Ordered ne Calibration solution and it still wont work. I will buy a coral instead of spending almost $200 bucks on this junk probe!
Can you guys help me please? I'm looking into automating my 75gl reef aquarium. I like the Apex for its wireless/cloud features. Looking to monitor Temp, PH, Alkalinity, and eventually Calcium and Salinity. With all the various modules it can be confusing. Could you all tell me what equipment is needed for the most bank for my buck. Thinking all I need is the Apex Jr. for power supply and can always add on if needed.
Question posted on Jun 26, 2016 4:28:00 PM
Great question! Honestly, the most bang-for-your-buck, as far as future upgrades would be the newest Neptune Apex. It offers pH, Temp, Salinity, and ORP monitoring out of the box! :-)
Answer by: Randy (Admin) on Jun 29, 2016 6:18:00 PM
Packing up my apex for a move. How should these probes be stored for long term (about 6 months)?
Question posted on Mar 20, 2016 2:04:00 PM
Great question!
The probes will last around 1.5-2 year maximum and may need to be replaced by the time the tank is being set up, however they can be stored in probe bottles listed below with solution. Feel free to let us know if you have any further questions!
https://www.bulkreefsupply.com/brs-ph-orp-probe-tip-soaker-bottle.html
The probes will last around 1.5-2 year maximum and may need to be replaced by the time the tank is being set up, however they can be stored in probe bottles listed below with solution. Feel free to let us know if you have any further questions!
https://www.bulkreefsupply.com/brs-ph-orp-probe-tip-soaker-bottle.html
Answer by: Connor (Admin) on Mar 21, 2016 6:12:00 PM
New to the controllers. Wondering if the probe needs to be taken out and cleaned or you just calibrate and put it in your tank and leave it? If it has to be cleaned how often? Thanks
Question posted on Jan 19, 2016 4:04:00 PM
Great question.
It is best to clean and re-calibrate the probes. When cleaning the probes should be unplugged and removed and rinsed with water to take any build up off. This can occur once every few months. probes do need to be replaced to accuracy once every 1-2 years. Feel free to let us know if you have any further questions!
It is best to clean and re-calibrate the probes. When cleaning the probes should be unplugged and removed and rinsed with water to take any build up off. This can occur once every few months. probes do need to be replaced to accuracy once every 1-2 years. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Jan 27, 2016 2:59:00 PM
Would this prove work with vertex cerebra?
Question posted on Nov 28, 2016 3:30:00 AM
Great question! Unlike pH probes, which use the same BNC connector, some Salinity probes are proprietary to their manufacturer's equipment. For example, the Salinity probe for Neptune Apex will not work with the ReefKeeper and vice versa. :-)
Answer by: Randy (Admin) on Nov 28, 2016 7:34:00 AM
Do I need to buy the salinity module in addition to the APEX controller that is $549 in addition to this probe to make all things work best together?
Question posted on Mar 10, 2016 2:29:00 PM
Great question!
You will need the PM2 module in addition to the apex and salinity probe. Feel free to let us know if you have any further questions!
You will need the PM2 module in addition to the apex and salinity probe. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 10, 2016 4:30:00 PM
How long is the cord on these? If it's not long enough to reach where I want to put my Apex is there any way to extend the cable?
Question posted on Mar 12, 2016 9:18:00 PM
Great question!
These will have a 10.5 foot cable attached. You would need to look into a BNC adapter cable to increase the length. Feel free to let us know if you have any further questions!
These will have a 10.5 foot cable attached. You would need to look into a BNC adapter cable to increase the length. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 14, 2016 4:41:00 PM
I am thinking of using salinity to regulate my ATO in my new 90 gallon reef I am building with float switch as back up. Do you think this is a valid approach? pros/cons?
Question posted on Aug 6, 2016 10:49:00 PM
Hey there, great question. I would not recommend using salinity to be the control of your ATO for a couple of reasons. First, any conductivity probe has a variance of some sort which could be the difference of 1.025SG +/- .002. This could cause misreadings and fluctuations outside of the ranges you desire. Second, conductivity probes need to be calibrated on a regular schedule to ensure accuracy, which means that they fall out of calibration. If you aren't calibrating on a weekly, even daily basis, how can you trust the readings 24/7? Keep it simple in my opinion. Evaporation leaves salt in the tank and takes freshwater out, replace with equal amounts of fresh water and you will be more accurate than any probe could be. ;-)
Answer by: Randy (Admin) on Aug 9, 2016 9:44:00 PM
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