Honeywell H8908ASPST Humidistat Humidity Control

The H8908B Humidistat and H8908C Dehumidistat (humidity controllers) provide automatic low voltage control of humidifiers and dehumidifiers or ventilators, respectively, in central heating and air conditioning systems. They have a SPST, snap-acting, dust-proof switch and are designed for wall or surface duct mounting.Features

•  SPST, snap-acting, dust-proof switch and are designed for wall or surface duct mounting.
•  Positive ON and OFF settings.
• Twelve-inch ribbon of thin, moisture-sensitive nylon ribbon wound around three bobbins effectively gives optimum control for reliable operation under changing ambient conditions.
• Mounts in duct or on wall surface.