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Siemens QFM81.21 : Duct Hygrostat with Covered Setpoint Dial, SPDT

Siemens

MSRP: $494.87
$188.05
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SKU:
QFM81.21
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Siemens QFM81.21 : Duct Hygrostat with Covered Setpoint Dial, SPDT

Hygrostats are used for controlling and monitoring relative humidity in facilities under HVAC control. They ensure duct humidity control within the selectable range of 15 to 95% relative humidity. The hygrostats do this by controlling humidification or dehumidification equipment. Duct hygrostats can be used as minimum or maximum limiters in the supply air duct.

Degree of protection IP55
Digital outputs
CO: 1 , Potential-free
Setpoint setting range 15…95 % r.h.
Switching differential 4 % r.h.
Operating voltage Contact Rating: 3A@ 24 Vac/Vdc Max; 100mA Min
Immersion length 130…156 mm
Dimensions (W x H x D) 73 x 140 x 64 (246) mm
Digital output, switching current 5 (3)A
Digital output, switching voltage 250 V