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

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

The Siemens QFA3212.EWSN is a wall-mounted room temperature and humidity sensor with a plastic housing and no display. It provides a 4 to 20 mA humidity output, a temperature accuracy of ±0.54°F, and a relative…

SKU 3G-OTH-70795

Also listed as: QFA3212EWSN · QFA3212 EWSN · QFA3212-EWSN

Brand
Siemens
Item
Temperature and Humidity Sensor: Wall Mount, 32°F to 131°F, Polycarbonate
Category
Room Temperature & Humidity Sensors
Available to Order
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Technical specs
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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
QFA3212.EWSN
Type
32°F to 131°F, Polycarbonate, Single Measurement
Display
No Display
Housing
Plastic
Includes
Anchors
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%
Electrical Connection Type
Plug-In
Relative Humidity Accuracy
±2% of Full Scale
Compatible Building Automation Protocols
BACnet MS/TP
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 QFA3212.EWSN is a wall-mounted room temperature and humidity sensor with a plastic housing and no display. It provides a 4 to 20 mA humidity output, 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 BACnet MS/TP building automation protocols and includes anchors for installation.

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 QFA3212.EWSN temperature and humidity sensor used for?

The Siemens QFA3212.EWSN is a wall-mounted room sensor that measures temperature from 32°F to 131°F and relative humidity from 0 to 100%. It outputs a 4 to 20 mA humidity signal and communicates via BACnet MS/TP, making it suitable for building automation systems in commercial HVAC applications.

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

The Siemens QFA3212.EWSN has a temperature accuracy of ±0.54°F and relative humidity accuracy of ±2% of full scale. It features a polycarbonate plastic housing, no display, plug-in electrical connection, and includes anchors for wall mounting. It is compatible with BACnet MS/TP building automation protocols.

Where to buy the Siemens QFA3212.EWSN worldwide?

3G Electric supplies the Siemens QFA3212.EWSN temperature and humidity sensor to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this BACnet MS/TP compatible sensor.

How to install the Siemens QFA3212.EWSN wall mount sensor?

Install the Siemens QFA3212.EWSN by mounting it on a wall at a representative room height, away from direct heat sources or drafts. Use the included anchors for secure attachment. Connect the plug-in terminals per the wiring diagram for BACnet MS/TP communication and 4 to 20 mA humidity output.

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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