Growlink ESM2 Climate Sensor w/CO2 Mag Drive you gain total control over

you gain total control over your nutrient regimen without interference from baseline minerals

High-Flow Compatibility: Specifically designed for the 100 GPM Mega-Flo series with -HV specifications

Built for growers

Extreme Heat Rating: Fully operational in water temperatures reaching up to 167°F (75°C)

Gro Block Improved Large GR5

Growlink ESM2 Climate Sensor w/CO2 Mag Drive you gain total control overGrowlink ESM 2 Climate Sensor for CO2, Humidity, Temperature, and Pressure The ESM 2 is a modular 4 in 1 probe that reads CO2, humidity, temperature, and pressure on one hardwired RS485 daisy chain. Power runs on 15 30 VDC from the Growlink control panel. The sensing module unscrews from the body for swap out at calibration intervals. Each unit ships with a unique MAC address printed on the box. The chain map matches a known room and chain position