TROLMASTER 3-in-1 Sensor for Hydro-X only（MBS-TH）

TROLMASTER 3-in-1 Sensor for Hydro-X only（MBS-TH） TROLMASTER 3-in-1 Sensor, Temp/Humid/Light sensor for the Hydro-X system. Note: This is a replacement or spare part. The main controller comes with a sensor already.   "Sensors should remain dry and clean to prevent premature failure. Do not spray foreign substances or allow water / condensate on the sensors"