Johnson W42AA-1C Humidistat 10-90% Range SPDT

The W42AA humidistat controls humidifying or dehumidifying equipment, or both. The humidistat is a 3-wire device with single-pole, double-throw, snap-acting contacts.

W42AA-1C Features:

• Three-wire SPDT switch permits control of humidifying or dehumidifying equipment or both with one control
• Stable and accurate human hair sensing element
• Easy to read dial is adjustable over a range of 10 to 90% RH
• Concealed dial lock screw for sealed setting

Technical Literature:

Johnson W42AA Series Data