The Sentinel CPPM-1 CO2 Controller is very accurate and long lived - up to ten years! It uses a state of the art CO2 sensor that can be easily self calibrated. Other controllers may have to be sent in for calibration. The CPPM-1 can operate in two different modes - fuzzy logic or on/off. Use the fuzzy logic mode if your connecting this sensor to a compressed source (bottle) and on/off when connecting to a CO2 generator.
A unique feature is that the actual CO2 sensor can be placed up to 100 feet from the base unit for remote operation. The CPPM-1 CO2 Controller is an outstanding performer at an unbelievable price.
