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Iluminar HASH Environment Sensor Module | PAR Temp RH CO2 VPD Super Sprouter That stack earns rotation slotsIluminar HASH Environment Sensor Module for Wireless Room Monitoring The Iluminar HASH Environment Sensor Module is a wireless multi zone probe. It pairs to the HASH Lighting Controller and feeds it real time PAR, temperature, humidity, CO2, and calculated VPD. Inside the housing: a Bosch BME280 for temp and RH, an industrial grade SH DS NDIR CO2 sensor, and a phototransistor for light. Connection back to the controller is RF wireless. Up to 1100 m