QAA2072.WU Siemens Sensor
Room Temperature Sensor, 4-20 MA, 55-95 Deg F, Sensing Only, White
The Siemens QAA2072.WU RTS, 4-20 MA, 55-95 DEGF, SENSING ONLY,
Siemens QAA2072.WU Room Temperature Sensor – 4-20 mA Output, 55-95°F (13-35°C)
Overview
The Siemens QAA2072.WU is a room temperature sensor designed for building control systems. It provides a 4-20 mA analog output signal, is sensing-only (no display or setpoint buttons), and comes in a white plastic housing with the Siemens logo. Intended for indoor use, this sensor is ideal wherever accurate temperature monitoring and control are required, such as with HVAC controllers or building automation systems.
Specifications
| Specification | Details |
|---|---|
| Brand / Model | Siemens QAA2072.WU |
| Sensor Type | Room temperature sensor (sensing only) |
| Output Signal | 4-20 mA analog output |
| Operating (Sensing) Temperature Range | 55°F to 95°F (≈ 13°C to 35°C) |
| Accuracy | ± 0.9°F (± 0.5°C) over the operating range |
| Power Supply / Requirements | 20-30 V DC, with low current draw |
| Housing / Cover | White plastic, Siemens logo |
| Cover Dimensions | Height: ~ 3-11/32 in; Width: ~ 2-1/2 in; Depth: ~ 1-1/2 in |
| Wiring / Cable Length Maximum | Up to ~ 750 ft (≈ 228 m) depending on wire gauge |
| Wire Gauge / Connections | Typically 18-22 AWG, multi-conductor |
| Installation Notes | Indoor mounting; follow wiring instructions to avoid noise or signal loss; adhere to NEC Class 2 for wiring |
| Use Case / Application | Building automation, HVAC systems, room controllers requiring 4-20mA temperature input |
Features & Benefits
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Provides stable, accurate temperature signal via 4-20 mA which is robust for noisy / long cable runs.
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White housing with Siemens logo ensures OEM fit & easily identifiable.
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Low-power sensor helps reduce load on control systems.
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Compact size allows installation in standard wall-boxes or sensor locations without bulk.
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Built for compatibility with Siemens Q-series controllers and common BAS systems.
Applications
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Room temperature monitoring in commercial and residential HVAC systems.
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Inputs for building automation systems that require 4-20 mA temperature signals.
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Use with controllers, RTUs, or terminal units that do not require local display or setpoint adjustments.
Installation & Maintenance Notes
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Mount sensor away from direct sunlight, air diffusers, or heat-producing equipment to avoid false readings.
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Use proper wire gauge and route wiring to minimize electromagnetic interference.
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Ensure connections are clean and tight; moisture can affect sensor accuracy.
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Periodically inspect for dust/dirt or housing damage that could degrade thermal transfer.
Warranty & Quality Assurance
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Manufactured to Siemens quality and material standards.
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Meets relevant safety and performance standards for building automation sensors.
Related Products
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Replacements: QAA22SS.EWSN or QAA22SS.EWNN
| Weight | 5 lbs |
|---|---|
| Dimensions | 2 × 2 × 2 in |
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