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Siemens Temperature and Humidity Sensor: Wall Mount, Digital, 32°F to 131°F, Polycarbonate - Room Temperature & Humidity Sensors
SiemensRoom Temperature & Humidity Sensors

Siemens Temperature and Humidity Sensor: Wall Mount, Digital, 32°F to 131°F, Polycarbonate

The Siemens QFA3212.FWSN is a wall-mounted room temperature and humidity sensor with a digital display and plastic housing. It provides a humidity output of 0 to 10V DC, a temperature accuracy of ±0.54°F, and a…

SKU 3G-OTH-70779

Also listed as: QFA3212FWSN · QFA3212 FWSN · QFA3212-FWSN

Brand
Siemens
Item
Temperature and Humidity Sensor: Wall Mount, Digital, 32°F to 131°F, Polycarbonate
Category
Room Temperature & Humidity Sensors
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Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Siemens
Manufacturer Part Number
QFA3212.FWSN
Type
Digital, 32°F to 131°F, Polycarbonate, Plastic
Display
Digital Display
Housing
Plastic
Includes
Trim Rings
Product Type
Room Temperature and Humidity Sensor
Humidity Output
0 to 10V DC
Mounting Location
Wall Mount
Temperature Accuracy
±0.54°F
Relative Humidity Range
0 to 100%
Electrical Connection Type
Plug-In
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 QFA3212.FWSN is a wall-mounted room temperature and humidity sensor with a digital display and plastic housing. It provides a humidity output of 0 to 10V DC, a temperature accuracy of ±0.54°F, and a relative humidity accuracy of ±2% of full scale over a 0 to 100% range. This sensor is compatible with LoRaWAN building automation protocols and includes trim rings for installation.

Frequently Asked Questions

What is the Siemens QFA3212.FWSN temperature and humidity sensor used for?

The Siemens QFA3212.FWSN is a wall-mounted room sensor used in building automation systems to monitor temperature and relative humidity. It outputs a 0 to 10V DC humidity signal and communicates via LoRaWAN protocol, making it suitable for HVAC control, energy management, and environmental monitoring in commercial or industrial facilities.

What are the specifications of the Siemens QFA3212.FWSN sensor?

The Siemens QFA3212.FWSN features a digital display, plastic housing, and wall-mount design. It measures temperature from 32°F to 131°F with ±0.54°F accuracy and relative humidity from 0 to 100% with ±2% full-scale accuracy. Humidity output is 0 to 10V DC, and it is compatible with LoRaWAN building automation protocols. Includes trim rings.

Where to buy the Siemens QFA3212.FWSN sensor worldwide?

You can source the Siemens QFA3212.FWSN sensor worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we provide competitive sourcing for building automation components.

How to install the Siemens QFA3212.FWSN wall-mounted sensor?

Install the Siemens QFA3212.FWSN by mounting it on a wall at typical room height, away from heat sources or drafts. Use the included trim rings for a clean finish. Connect the plug-in electrical terminals per the wiring diagram, ensuring the 0 to 10V DC output is wired to your building automation system. Follow standard low-voltage installation practices.

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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