TrolMaster Humidistat Station (HS-1） grower's choice 720 Tested thoroughly in soil

Tested thoroughly in soil

The powerful ROI-E420 LED grow light optimizes plant growth at all stages

Customized programming allows almost limitless degree of control

coco coir and all types of media

Wear resistant shafts and impellers

TrolMaster Humidistat Station (HS-1） grower's choice 720 Tested thoroughly in soilThe HS 1 from TrolMaster is used to control commercial dehumidifiers. Most larger commercial dehumidifiers have a low volt control option so the dehumidifier can be controlled by an external humidistat. The HS 1 works and is wired exactly like an external humidistat. The HS 1 is the best way to control your dehumidifiers by eliminating the need to control the high amperage inrush current associated with dehumidifiers.