Dual Sensor CO2 Controller

The RAD-0502 - dual sensor CO2 controller for grow rooms can monitor and control carbon dioxide concentrations at two locations from 0 to 3,000 parts per million. With an additional built-in temperature measurement and a photo sensor, users can also turn off relays during dark periods, which can save them money and provide more accurate growing control.

CO2 Meter
https://www.co2meter.com/



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