Mechanical humidity controllers provide automatic control of humidifiers and dehumidifiers or ventilators in central heating and air conditioning systems.

Honeywell Humidistat, 24/120/240 VAC, 5% Relative Humidity Adjustable, Fully Enclosed/Snap Action, SPST, Wall Mounting, Gray, 3-3/8 in W x 6-3/16 in H x 2-1/4 in D

• Fully enclosed, SPST, snap acting, dust-proof switch are designed for wall or surface duct-mounting
• H8909 and H46 models include Positive On-Off settings permit manual operation of controlled equipment
• H600 models have a removable setting knob prevents tampering