MPN

Siemens Hygrostat, Wall 250V ac

RS Stock No.:: 639-114
Mfr. Part No.:: QFM81.21 / BPZ:QFM81.21
Manufacturer:: Siemens

Subtotal (1 unit)*

PHP25,392.44

(exc. VAT)

PHP28,439.53

(inc. VAT)

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Ready to ship from May 25, 2026

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Units	Per Unit
1 +	PHP25,392.44

*price indicative

RS Stock No.:: 639-114
Mfr. Part No.:: QFM81.21 / BPZ:QFM81.21
Manufacturer:: Siemens

Specifications

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Siemens
	Mount Type	Wall
	Product Type	Hygrostat
	Minimum Humidity Setting	15%RH
	IP Rating	IP55
	Maximum Supply Voltage	250V ac
	Minimum Operating Temperature	0°C
	Maximum Operating Temperature	70°C
	Height	246mm
	Standards/Approvals	CE, EN 60730-1, RoHS
	Width	73mm
	Series	QFM81

	Select all
	Brand Siemens
	Mount Type Wall
	Product Type Hygrostat
	Minimum Humidity Setting 15%RH
	IP Rating IP55
	Maximum Supply Voltage 250V ac
	Minimum Operating Temperature 0°C
	Maximum Operating Temperature 70°C
	Height 246mm
	Standards/Approvals CE, EN 60730-1, RoHS
	Width 73mm
	Series QFM81

Datasheet - QFM81.21 / BPZ:QFM81.21

COO (Country of Origin):: CH

The Siemens room hygrostat designed to maintain precise humidity control within indoor spaces, featuring a set point adjustment range of 15 to 95% relative humidity. The set point adjuster is conveniently located inside the device, ensuring secure and tamper-proof settings. This hygrostat is ideal for use in HVAC systems to regulate humidity levels in residential, commercial, and industrial environments. Its reliable operation helps maintain optimal air quality by preventing excessive moisture or dryness in indoor air.

Durable and robust design for long term performance

IP55 protection

RoHS compliant