Siemens Qfm81.2 Duct Hygrostat With External Setpoint, 30 - 90% Rh

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Buy Siemens QFM81.2, DUCT HYGROSTAT W/ EXT. STPT, 30 - 90% RH

Siemens QFM81.2, DUCT HYGROSTAT W/ EXT. STPT, 30 - 90% RH

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QFM81.21 - Siemens Duct hygrostat, setpoint setting range 1595 % r.h., setpoint adjuster inside device

DUCT RH & TMP SNSR, 4-20mA, 2%, DISPLAY

QFM3171D | DUCT RH & TMP SNSR, 4-20mA, 2%, DISPLAY | Siemens

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Testing GFCIs and afcis on a monthly basis is a good idea that is sometimes forgotten. Underwriters laboratories UL suggests that afci/GFCI Devices be tested every 30 days after installation to ensure they are properly working. Now the new self test lockout feature enables the dual function circuit breaker to automatically and continuously test itself to ensure that it is working properly.