Not Reliable By Milan on 9/25/2016
Milan wouldn't recommend this product to a friend
In retrospect you really have to think about why you would want to spend over $200 on this after needing to buy the PM2 module, the probe and the calibration solution. The probe failed after 6 months and I am simply not willing to spend so much money on a prob.
At first it was sort of cool to see micro fluctuations in the salinity between ATO cycles (which are really irrelevant), but after that wore off it became pretty useless. Any notable fluctuations were always caused by the sensitivity of the probe. I was careful not to place it in an area where bubbles could stick to the probe, but I still had to shake it ever so often to get accurate readings. I wanted to use it as a fail safe, as a last resort if my ATO did not work properly. Due to it's unreliability the fail safe actually became the problem and the source of many false alarms. Eventually the probe die and read zero. Complete waste of money IMO. If you are looking for fail safe's, look at adding sanity checks using virtual outlets instead.
Good, but stubborn. By Jason on 8/24/2016
Jason would recommend this product to a friend
Works great, but can be a little stubborn when first put into water. Pay special attention to instructions and tips on how to remove air bubbles. You need to also have temp probe plugged into PM2 module for increased accuracy.
Works well By Button32 on 3/6/2016
Button32 would recommend this product to a friend
I just like a lot of people had a hard time cal. But did get it done. I think I had a hard time because the solution was cold. After cal. It works great. I used the pinpoint solution after I used the apex solution and it work fine. I have only been using it for a month,but have not had anything to complain about.
Solid By Steve on 1/27/2016
Steve would recommend this product to a friend
Had to standardize it a couple of times in the cal solution. Then had to tweak my tempt sensor a touch when I moved it over from the base module for temp compensation. Not really a big deal. Readings have been solid and dead on since initial setup. No complaints here.
Great By Fishfreak on 2/24/2015
Fishfreak would recommend this product to a friend
This is a great add-on for anyone using an apex. I did find out that in order to keep my readings stable is was very necessary to add an addition temp probe to the PM2. At first I was getting crazy numbers and once I added the temp probe it has been spot on ever since.
Work great By Chavinpat on 2/13/2015
Chavinpat would recommend this product to a friend
Read the instruction and warning carefully. Avoid bubble, avoid others electrical equipment, and more importantly do not knock the probe on any hard surface. It is not hard to calibrate, but be sure to use calibration solution from Apex. I tried other brands, and the reading were off.
Fairly stable, but subject to bubble and particle interference By Joe on 1/5/2015
Joe would recommend this product to a friend
I've been running the probe for a little more than a month now, and overall it works as you expect. If you place it in an area of the sump or tank that does not have any bubbles, it is fairly stable and accurate. It does bounce around 0.1 ppt, so if the true salinity is 35, you will get values between 35.1 and 34.9, but this is within the spec of the probe.
I give it only 4 stars because the probe design makes it very susceptible to bubbles or detritus. I use a lot of different conductivity probes for work (i.e. YSI, hydrolab, seabird, etc), but none have this kind of problem. It is a poor design and I don't know why Neptune Systems uses it. You cannot place this probe in an area with bubbles unless you add some kind of protection against them.
disapointed By joe on 12/29/2014
joe wouldn't recommend this product to a friend
I wish I would have known I needed to purchase the Neptune Systems Conductivity Calibration Solution. For as expensive probe, you would think the solution would be included. Neptune should have its dealers note solution is needed. I was disappointed after waiting for delivery to find out I needed to make a second order so I contacted BRS and the rep seemed to care less, I asked for his managers name but he has not provided it. Wait its not over, I ordered the wrong calibration fluid I think? I received the 475 and i need the 53000??? so here i set waiting on my third order to ship??
Kinda Finicky. By Franklyn on 12/17/2014
Franklyn would recommend this product to a friend
The probe is kinda finicky to calibrate. Took multiple times of calibrating to getting working right. After working great for a few months it began to drift. Again was a pain to recalibrate. One calibrated its pretty accurate. I compared it with my refractor and there's a very minimal difference..
Works great By Cesar on 12/13/2014
Cesar would recommend this product to a friend
It was a bit challenging to set up and calibrate but once I did it has performed great. Very precise and a great layer of redundancy to alert me if something has gone wrong with my ATO or automatic water changes.