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SiemensDuct Temperature & Humidity Sensors

Siemens QFM3100 Duct Humidity Sensor

The Siemens QFM3100 is a duct-mount humidity sensor with a plastic housing, designed for single measurement of relative humidity. It provides a 4 to 20 mA output, covers a 0 to 100% relative humidity range, and…

SKU 3G-OTH-68619

Also listed as: QFM 3100 · QFM-3100

Brand
Siemens
Item
QFM3100 Duct Humidity Sensor
Part Number
QFM3100
Category
Duct Temperature & Humidity Sensors
Available to Order
Also known as:QFM3100Siemens
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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
QFM3100
Display
No Display
Housing
Plastic
Product Type
Duct Humidity Sensor
Humidity Output
4 to 20 mA
Mounting Location
Duct Mount
Relative Humidity Range
0 to 100%
Electrical Connection Type
Screw Terminals
Relative Humidity Accuracy
±2% of Full Scale
Compatible Building Automation Protocols
BACnet IP
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 QFM3100 is a duct-mount humidity sensor with a plastic housing, designed for single measurement of relative humidity. It provides a 4 to 20 mA output, covers a 0 to 100% relative humidity range, and offers an accuracy of ±2% of full scale. The sensor uses screw terminals for electrical connection and is compatible with BACnet IP for building automation systems.

Frequently Asked Questions

What is the Siemens QFM3100 duct humidity sensor used for?

The Siemens QFM3100 is used for single-point relative humidity measurement in HVAC ducts. It is compatible with BACnet IP building automation systems, making it suitable for commercial and industrial environments where precise humidity monitoring and control are required.

What are the specifications of the Siemens QFM3100 humidity sensor?

The Siemens QFM3100 is a duct-mount humidity sensor with a plastic housing. It provides a 4 to 20 mA output, covers a 0 to 100% relative humidity range, and offers ±2% of full scale accuracy. It uses screw terminals and supports BACnet IP protocols for building automation integration.

Where to buy the Siemens QFM3100 humidity sensor worldwide?

You can source the Siemens QFM3100 humidity sensor 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 on this item.

How to install the Siemens QFM3100 duct humidity sensor?

Mount the Siemens QFM3100 in a duct with the sensing element exposed to airflow. Use screw terminals for electrical connection, ensuring the 4 to 20 mA output is wired to the building automation system. Follow standard HVAC sensor installation practices for 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
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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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