PINPOINT AC Adapter Kit 110 Vac
AMERICAN MARINE (PinPoint)
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, and will control pH in both a downward and upward direction. The user will select his or her own set point and any range of acceptable pH around this setpoint.
I have used either the Pinpoint pH meter or the controller for probably 20 years. The devices were simple to use and NEVER had any issues other than the probe which needed to be replaced from time to time (usually because I let it get dry). I strongly recommend any of the Pinpoint meters/controllers.