The Siemens QPA2000 Series carbon dioxide (CO2) room sensors are designed for applications where precise, stable sensing of carbon dioxide (CO2), temperature, or relative humidity is required. The QPA2002 models sense both volatile organic compounds (VOCs) and CO2, with the output signal automatically switching to reflect the higher of the two values. Siemens CO2 VOC sensors are designed to help maximize occupant comfort and are not suitable for use in life safety applications.

Features:
Maintenance-free CO2 sensing element (depending on type) based on optical infrared absorption measurement (Non-Dispersive Infrared)
Or with VOC2 sensing element based on a heated tin dioxide semiconductor
CO2 temperature (active or passive) and CO2 humidity-temperature multisensor
No recalibrations required
Operating voltage AC 24 V or DC 15 to 35 V
Signal outputs DC 0 to 10 V or DC 0 to 5 V adjustable
Selectable passive temperature sensing element

Specifications:

Manufacturer: Siemens Building Technology
Manufacturer Part Number: QPA2000
Product Type: Room Air Quality Sensor
Operating Temperature: 32 to 122 Degree Fahrenheit
Measurement Range: 0 to 2000 PPM
Electrical Connection: Screw Terminals
Operating Voltage: 24 VAC
Frequency: 50/60 Hertz
Dimensions: 3.95" x 4.35" x 2"
Weight: 0.3 Lb