American Marine PINPOINT pH Probe

Connected easily to my Neptune Apex.

Works perfectly with my BlueLab combo meter and at half the price too!

NO MORE TEST KITS AND PLAYING IN THE TANK. I LOOK AT THE READ OUT OF THE PH 24/7. THE ONLY WAY TO GO. IF YOU LOVE YOUR FISH YOU WILL LOVE THE PINPOINT PH MONITORING SYSTEM

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

Loses calibrationQUICKLY !!!!

I bought this in February of this year. It will not take an accurate reading. Ive calibrated it on numerous occasions but it repeatedly reads low. Not worth the money.

Has anyone noticed these are slightly smaller diameter than normal and require extra tightening of the ph port gland in your calcium reactor?

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.

Works perfectly. I hooked it up to the HCS12 MC9S12C128 microcontroller and it produced proportional voltages correctly. Keep in mind that you need to purchase the calibration solutions (#7 and either/and #10, #4) to make sure your sensor is reading properly. The probe will read properly every time; negative voltages for one side of the pH scale and positive for the other. However, your sensor (be it homemade or bought) may not interpret and display the CORRECT pH value without calibration first.

Piece of garbage will not calibrate. With the 7 solution I can not even turn the dial enough to get it past 6. Waste of money