The W42AA humidistat controls humidifying or dehumidifying equipment or both. The humidistat isa 3-wire device with single-pole, double-throw, snap-acting contacts. The W42 features a human hairsensing element and has a concealed dial lock screw.Electrical Rating: Pilot Duty only - 125 VA at 120/240 V.A.CMaximum Operating Ambient: 38°C
