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SiemensDuct Temperature & Humidity Sensors

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

The SIEMENS QFM3171D is a duct-mounted humidity and temperature sensor with a digital display and plastic housing. It provides a 4 to 20 mA humidity output, a temperature accuracy of ±0.50 K, and a relative humidity…

SKU 3G-OTH-68756

Brand
Siemens
Item
Humidity and Temperature Sensor: Duct Mount, Digital, 32°F to 122°F, Polycarbonate
Category
Duct Temperature & Humidity Sensors
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Siemens
Manufacturer Part Number
QFM3171D
Type
Digital, 32°F to 122°F, Polycarbonate, Plastic
Display
Digital 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
MP-Bus
For Use With Building Automation Systems
Building Automation System Compatible

Technical Documents

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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS QFM3171D is a duct-mounted humidity and temperature sensor with a digital display and plastic housing. It provides a 4 to 20 mA humidity output, a temperature accuracy of ±0.50 K, and a relative humidity accuracy of ±5% of full scale over a 0 to 100% range. The sensor uses screw terminals and is compatible with MP-Bus building automation protocols.

Frequently Asked Questions

What is the Siemens QFM3171D duct sensor used for?

The Siemens QFM3171D is used for measuring temperature and relative humidity in HVAC ducts. It provides a 4 to 20 mA humidity output and is compatible with MP-Bus building automation protocols, making it suitable for commercial building automation systems that require accurate environmental monitoring.

What are the specifications of the Siemens QFM3171D?

The Siemens QFM3171D is a duct-mounted sensor with a digital display and plastic housing. It measures temperature from 32°F to 122°F with ±0.50 K accuracy and relative humidity from 0 to 100% with ±5% of full scale accuracy. It uses screw terminals and outputs 4 to 20 mA for humidity.

Where to buy the Siemens QFM3171D worldwide?

You can source the Siemens QFM3171D through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine Siemens components for building automation systems.

How to install the Siemens QFM3171D duct sensor?

Mount the Siemens QFM3171D in a duct location with representative airflow. Use screw terminals for electrical connections per the wiring diagram. Ensure the sensor is not exposed to condensation or direct sunlight. Follow standard HVAC installation practices for duct-mounted sensors to ensure accurate readings.

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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