American Marine PINPOINT pH Probe

This pen looks like it has broke on me already. I dont want to wait 10 min to see if that fixes it. Right now after 2 min in 7.0 solution, Im showing a reading of 11.2!@# I put in 4.0 solution for a cpl min, and Im getting a 1.1 reading...wtf!~@! Complete waist of money this pen was. Stick with bluelabs pen!

Good value. Holds its calibration well and stabilises at a new reading fairly quickly. Its not a high priced unit so I did do a quick check on the accuracy. After calibrating with standard buffers at 7.0 and 10.01 I made up a pH 7.8 potassium phosphate buffer solution and the probe (with American Marine pinpoint pH meter) gave a reading 0f 7.79. Im a home user and only interested in the range from 7.0 to 9.0 so please bear that in mind when reading my review.

Writing this review after 1 year of use. So far is has worked great and is a good value. I have it working with the Atlas Scientific board in my Reef-Pi setup. The much more expensive Atlas probe died after 1 year and was not as accurate. So I would buy this again in future.

Soaking solution had dried out when I received it. Packaged very poorly.

Arrived fast and was as described

Works perfectly with my meter.

Doesnt work! Probe arrived in a make shift box, looked used, and was dried out with a piece of paper towel in the probe cover! Save your money and buy somewhere else!

After shopping for a replacement PH sensor for my old Polaris Watermatic C-600 ORP/pH Controller and finding the going price around $200, I decided to give this probe a shot. It works perfectly and I am once again able to calibrate the controller. Physically the probe may be slightly smaller in diameter as I had some trouble getting a good seal. It did arrive loose in a box without any packing material, but because of its weight and the 10 of lead I dont think it moved around much. The tip of the probe was in a vial of solution as it should be.

This works great with the Digital Aquatics Reef Keeper Elite. All I did was calibrate it using pinpoint 7 and 10 pH fluid and it works perfect.

I have used Pinpoint PH monitor for 15 years from saltwater aquarium to freshwater aquariums. The probes have always been easy to calibrate and last. However the probes from this company are temperamental and the bulb on the end always seem to break. After owning 2 of these now in ~18 months my opinion is they are of poor quality. And the package is poor, makes me think they are used. I would rather spend the extra money and get my probes direct from American Marine