The Honeywell H46C1166 mechanical humidity controller provides automatic control of humidifiers and dehumidifiers or ventilators in central heating and air conditioning systems.

Features: 

• Fully enclosed, SPST, snap-acting, dust-proof switch are designed for wall or surface duct mounting
• H8909 and H46 models inlcude Positive ON-OFF settings permit manual operation of controlled equipment.
• H600 models havea removable setting knob prevents tampering