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PINPOINT pH Controller is an inexpensive yet rugged pH controller interface device. This device will function as a full time visual pH monitor and can also automate up to 2 additional electrical devices via the electrical plug inputs on the back of the controller. The device(s) attached via electrical plug to the controller must have a methodology to raise or lower the pH value. One device could be a mechanism to lower the pH measurement such as CO2 regulator or liquid pump to add pH down solution. Another electrical device to raise the pH measurement such as an air pump or pH up solution, etc can also be attached. The user would select a pH value to energize the attached device to lower or raise the pH to a preselected value at which time the controller will stop electricity. The User may attached only 1 or 2 devices depending if pH control is desired in only 1 or both up and down directions. The user will select an optimal pH value and a range of acceptable pH around this value. This full featured controller will accommodate an electrical device up to 3.0 amps at 120 VAC. Comes complete with PINPOINT pH electrode with 10 foot cable, Pre-mixed High Precision Calibration Fluids, Probe Storage Bottle and Adjusting Screwdriver.