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SiemensRoom Temperature & Humidity Sensors

Siemens Temperature and Humidity Sensor: Wall Mount, -40°F to 158°F, 4 to 20 mA

The Siemens QFA3171 is a wall-mounted room temperature and humidity sensor with a plastic housing and no display. It provides dual 4 to 20 mA outputs for temperature and humidity, with a temperature accuracy of…

SKU 3G-OTH-71064

Brand
Siemens
Item
Temperature and Humidity Sensor: Wall Mount, -40°F to 158°F, 4 to 20 mA
Category
Room Temperature & Humidity Sensors
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Technical Specifications

Siemens
Manufacturer Part Number
QFA3171
Type
-40°F to 158°F, 4 to 20 mA, Polycarbonate, Plastic
Display
No Display
Housing
Plastic
Product Type
Room Temperature and Humidity Sensor
Humidity Output
4 to 20 mA
Mounting Location
Wall Mount
Temperature Accuracy
±0.54°F
Relative Humidity Range
0 to 100%
Temperature Signal Output
4 to 20 mA
Electrical Connection Type
Screw Terminals
Relative Humidity Accuracy
±2% of Full Scale
Compatible Building Automation Protocols
LoRaWAN
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 QFA3171 is a wall-mounted room temperature and humidity sensor with a plastic housing and no display. It provides dual 4 to 20 mA outputs for temperature and humidity, with a temperature accuracy of ±0.54°F and relative humidity accuracy of ±2% of full scale over a 0 to 100% RH range. The sensor operates over a -40°F to 158°F range, uses screw terminals for electrical connection, and is compatible with LoRaWAN building automation protocols.

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 room 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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