Sentinel CPPM-4 CO2 Controller

The Sentinel CPPM-4 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 and is now removable. This allows for easier placement in your garden as well as its replaceable. 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-4 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. The CPPM-4 CO2 Controller is an outstanding performer at an unbelievable price.