American Marine: Pin Point PH Controller
PINPOINT pH Controller™ is an inexpensive yet rugged controller, which includes the appropriate probe and calibration fluids. This device will automate another electrical device such as a calcium reactor or magnetic solenoid for the addition of CO2 into an aquaculture or process system. This full feature controller will handle up to 5 amps. Comes complete with probe and calibration fluids.
American Marine: Pin Point PH Monitor
The PINPOINT pH Monitor™ is in use by thousands of customers worldwide. This affordable unit remains the only full-time pH monitor with .01 resolution. The PINPOINT pH Monitor™ requires only a 9-volt battery and is sold complete with probe and calibration fluids. The electrode is also available separately and fits any meter or monitor. Comes complete with meter, probe and all calibration fluids.