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SiemensDuct Temperature & Humidity Sensors

Siemens Humidity and Temperature Sensor: Duct Mount, 32°F to 122°F, Polycarbonate

The Siemens QFM2171 is a duct-mounted temperature and humidity sensor with a plastic housing and screw terminals. It provides a 4 to 20 mA humidity output, a relative humidity range of 0 to 95% with an accuracy of…

SKU 3G-OTH-68652

Brand
Siemens
Item
Humidity and Temperature Sensor: Duct Mount, 32°F to 122°F, Polycarbonate
Category
Duct Temperature & Humidity Sensors
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Technical Specifications

Siemens
Manufacturer Part Number
QFM2171
Type
32°F to 122°F, Polycarbonate, Single Measurement
Display
No Display
Housing
Plastic
Product Type
Duct Temperature and Humidity Sensor
Humidity Output
4 to 20 mA
Mounting Location
Duct Mount
Temperature Accuracy
±0.50 K
Relative Humidity Range
0 to 95%
Electrical Connection Type
Screw Terminals
Relative Humidity Accuracy
±5% of Full Scale
Compatible Building Automation Protocols
BACnet MS/TP
For Use With Building Automation Systems
Building Automation System Compatible
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens QFM2171 is a duct-mounted temperature and humidity sensor with a plastic housing and screw terminals. It provides a 4 to 20 mA humidity output, a relative humidity range of 0 to 95% with an accuracy of ±5% of full scale, and a temperature accuracy of ±0.50 K. This sensor is compatible with BACnet MS/TP building automation protocols and is designed for use with building automation systems.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens duct temperature & humidity sensors. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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