Siemens Building Technology QAC22 Sensor
The Siemens Building Technology QAC22 Sensor is a precision passive outdoor temperature sensor engineered for weather-compensated control in high-performance HVACR systems. Utilizing an LG-Ni 1000 ohm sensing element (Ni RTD, 1k Ohm @ 32F), this unit provides a highly stable output signal across a wide operating range of -58 °F to 158 °F (-50 °C to 70 °C). Designed for standard building automation systems, it accurately monitors outdoor air temperature while compensating for variables like solar radiation, wind speed, and thermal wall energy. This reliability makes it an essential reference sensor for flow temperature optimization and demand-controlled ventilation. The polycarbonate housing is built for durability, featuring a removable cover for easy access to the terminal block and support for either rear or bottom cable entry via a PG11 gland. When integrating this Siemens replacement sensor into existing controllers, technicians can rely on its consistent 14-minute time constant and ±0.4 K accuracy at freezing points for precise thermal management.
Key Benefits- Optimized Efficiency: Acts as a critical reference sensor for weather-dependent flow control, maximizing energy savings in heating and cooling plants.
- Industrial Grade Sensing: Built with an LG-Ni 1000 output signal for high accuracy and long-term stability without the drift common in lower-grade components.
- Weather-Resistant Design: The IP54-rated outdoor temperature sensor housing protects internal terminal connections from environmental degradation.
- Universal Controller Integration: Compatible with all major HVAC controllers that handle passive analog signals, simplifying field replacements and upgrades.
Where is the ideal mounting location for the QAC22?
For optimal outside temperature measurement, mount the sensor at least 8 feet above the ground on the north or northwest wall to minimize direct solar heating. Avoid placing it above windows, doors, or exhaust vents which can cause false readings.
Can I use standard thermostat wire for the connection?
Yes, the terminal block accepts standard interchangeable wiring, but for long runs, refer to your controller's specific datasheet for maximum permissible cable lengths to avoid resistance-induced errors.
What controllers are compatible with the LG-Ni 1000 signal?
The Siemens QAC22 is designed for any system configured for 1k Ohm at 32F (Ni1000/Landis & Gyr) curves, commonly used in Siemens Desigo, Talon, and many European-spec building management systems.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $28.63
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Description
The Siemens Building Technology QAC22 Sensor is a precision passive outdoor temperature sensor engineered for weather-compensated control in high-performance HVACR systems. Utilizing an LG-Ni 1000 ohm sensing element (Ni RTD, 1k Ohm @ 32F), this unit provides a highly stable output signal across a wide operating range of -58 °F to 158 °F (-50 °C to 70 °C). Designed for standard building automation systems, it accurately monitors outdoor air temperature while compensating for variables like solar radiation, wind speed, and thermal wall energy. This reliability makes it an essential reference sensor for flow temperature optimization and demand-controlled ventilation. The polycarbonate housing is built for durability, featuring a removable cover for easy access to the terminal block and support for either rear or bottom cable entry via a PG11 gland. When integrating this Siemens replacement sensor into existing controllers, technicians can rely on its consistent 14-minute time constant and ±0.4 K accuracy at freezing points for precise thermal management.
Key Benefits- Optimized Efficiency: Acts as a critical reference sensor for weather-dependent flow control, maximizing energy savings in heating and cooling plants.
- Industrial Grade Sensing: Built with an LG-Ni 1000 output signal for high accuracy and long-term stability without the drift common in lower-grade components.
- Weather-Resistant Design: The IP54-rated outdoor temperature sensor housing protects internal terminal connections from environmental degradation.
- Universal Controller Integration: Compatible with all major HVAC controllers that handle passive analog signals, simplifying field replacements and upgrades.
Where is the ideal mounting location for the QAC22?
For optimal outside temperature measurement, mount the sensor at least 8 feet above the ground on the north or northwest wall to minimize direct solar heating. Avoid placing it above windows, doors, or exhaust vents which can cause false readings.
Can I use standard thermostat wire for the connection?
Yes, the terminal block accepts standard interchangeable wiring, but for long runs, refer to your controller's specific datasheet for maximum permissible cable lengths to avoid resistance-induced errors.
What controllers are compatible with the LG-Ni 1000 signal?
The Siemens QAC22 is designed for any system configured for 1k Ohm at 32F (Ni1000/Landis & Gyr) curves, commonly used in Siemens Desigo, Talon, and many European-spec building management systems.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
