EPHUM220 Humidistat for use with Ecor Pro models DH25xx & DH35xx & Inox versions only You set the humidity level of the environment you want to dry by a simple dial. For instance 70% is a high relatively humidity (damp) while for instance a setting of 40% can be considered a relatively low humidity level. Plug and play use. Humidistat comes as a complete set with 5m of cable, mil plug for quickly plugging and securing into place onto DH25xx & DH35xx & Inox versions Please note this is dedicated a high voltage humidistat to Ecor Pro models Please note tolerance factor on the humidistat can be up to +/- 5% to that of the value shown on the control dial.