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SiemensDuct Temperature & Humidity Sensors

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

The Siemens QFM3171 is a duct-mounted temperature and humidity sensor with a plastic housing and no display. It provides a 4 to 20 mA humidity output, covers a relative humidity range of 0 to 100%, and offers a…

SKU 3G-OTH-68695

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

QFM3171 

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 100% 

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 QFM3171 is a duct-mounted temperature and humidity sensor with a plastic housing and no display. It provides a 4 to 20 mA humidity output, covers a relative humidity range of 0 to 100%, and offers a temperature accuracy of ±0.50 K with a relative humidity accuracy of ±5% of full scale. The sensor uses screw terminals for electrical connection and is compatible with BACnet MS/TP building automation protocols.

Used in

Common applications for Siemens

District cooling plants — LME73 + RWF55 for condenser-water modulation

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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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