We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

Siemens Humidity Sensor: Duct Mount, Polycarbonate, Single Measurement - Duct Temperature & Humidity Sensors
SiemensDuct Temperature & Humidity Sensors

Siemens Humidity Sensor: Duct Mount, Polycarbonate, Single Measurement

The Siemens QFM2100 is a duct-mount humidity sensor with a plastic housing and an adjustable probe. It provides a single measurement of relative humidity within a 30 to 70% range, outputting a 0 to 10V DC signal with…

SKU 3G-OTH-68546

Also listed as: QFM 2100 · QFM-2100

Brand
Siemens
Item
Humidity Sensor: Duct Mount, Polycarbonate, Single Measurement
Category
Duct Temperature & Humidity Sensors
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Siemens
Manufacturer Part Number
QFM2100
Display
No Display
Housing
Plastic
Includes
Adjustable Probe
Product Type
Duct Humidity Sensor
Humidity Output
0 to 10V DC
Mounting Location
Duct Mount
Relative Humidity Range
30 to 70%
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

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The Siemens QFM2100 is a duct-mount humidity sensor with a plastic housing and an adjustable probe. It provides a single measurement of relative humidity within a 30 to 70% range, outputting a 0 to 10V DC signal with an accuracy of ±5% of full scale. The sensor uses screw terminals for electrical connection and is compatible with MP-Bus building automation protocols.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the Siemens QFM2100 duct humidity sensor used for?

The Siemens QFM2100 is used for measuring relative humidity in HVAC duct systems. It outputs a 0 to 10V DC signal to building automation systems, enabling precise humidity control in commercial and industrial environments. Its adjustable probe and MP-Bus compatibility make it suitable for integration into larger building management networks.

What are the specifications of the Siemens QFM2100 humidity sensor?

The Siemens QFM2100 is a duct-mount humidity sensor with a plastic housing and adjustable probe. It measures relative humidity from 30 to 70% with an accuracy of ±5% of full scale. The output is 0 to 10V DC, and it uses screw terminals for electrical connection. It is compatible with MP-Bus building automation protocols.

Where to buy the Siemens QFM2100 humidity sensor worldwide?

You can source the Siemens QFM2100 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; we provide reliable sourcing and supply for this Siemens sensor.

How to install the Siemens QFM2100 duct humidity sensor?

Mount the Siemens QFM2100 in the duct with the adjustable probe inserted into the airflow. Connect the screw terminals to the building automation system using the 0 to 10V DC output. Ensure the sensor is within the 30 to 70% relative humidity range for accurate readings. Follow standard HVAC installation practices for best results.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
Temperature and Humidity Sensor: Wall Mount, Digital, 55°F to 95°F, Polycarbonate, Plastic (MPN QFA3280.FWSC)
Siemens
Temperature and Humidity Sensor: Wall Mount, Digital, 55°F to 95°F, Polycarbonate, Plastic (MPN QFA3280.FWSC)
Temperature and Humidity Sensor: Wall Mount, Digital, 32°F to 131°F, Polycarbonate, Plastic (MPN QFA3212.FWSN)
Siemens
Temperature and Humidity Sensor: Wall Mount, Digital, 32°F to 131°F, Polycarbonate, Plastic (MPN QFA3212.FWSN)
Temperature and Humidity Sensor: Wall Mount, -40°F to 158°F, 0 to 10V DC/4 to 20 mA, Polycarbonate (MPN QFA32SS.EWSN)
Siemens
Temperature and Humidity Sensor: Wall Mount, -40°F to 158°F, 0 to 10V DC/4 to 20 mA, Polycarbonate (MPN QFA32SS.EWSN)
Temperature and Humidity Sensor: Wall Mount, Digital, 55°F to 95°F, Polycarbonate, Plastic (MPN QFA3230.FWSN)
Siemens
Temperature and Humidity Sensor: Wall Mount, Digital, 55°F to 95°F, Polycarbonate, Plastic (MPN QFA3230.FWSN)
Temperature and Humidity Sensor: Wall Mount, Digital, 32°F to 122°F, Polycarbonate, Plastic (MPN QFA32SS.FWSN)
Siemens
Temperature and Humidity Sensor: Wall Mount, Digital, 32°F to 122°F, Polycarbonate, Plastic (MPN QFA32SS.FWSN)

More from Siemens

View all Siemens parts
Siemens
Siemens
Humidity Sensor: Duct Mount, Flange Mount, 100 mA to 5 A/24 V AC/DC, Fiberglass Reinforced PPS (MPN QFM81.2)
Siemens
Siemens
Humidity and Temperature Sensor: Duct Mount, 32°F to 122°F, Polycarbonate, Single Measurement (MPN QFM3171)
Siemens
Siemens
Humidity and Temperature Sensor: Duct Mount, 32°F to 122°F, Polycarbonate, Single Measurement (MPN QFM3160)
Siemens
Siemens
Humidity Sensor: Duct Mount, Polycarbonate, Single Measurement, Plastic (MPN QFM3100)
Siemens
Siemens
Humidity and Temperature Sensor: Duct Mount, 32°F to 122°F, Polycarbonate, Single Measurement (MPN QFM2171)
Siemens
Siemens
Humidity and Temperature Sensor: Duct Mount, Digital, 32°F to 122°F, Polycarbonate, Plastic (MPN QFM3160D)
Siemens
Siemens
Humidity and Temperature Sensor: Duct Mount, Digital, 32°F to 122°F, Polycarbonate, Plastic (MPN QFM3171D)