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Siemens QPA... Room Air Quality Sensor

List Price: $336.00  
($351.12 inc tax) You save: $16.80 (5%)
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• maintenance-free CO2 sensing element (depending on type) based on optical infrared absorption measurement (NDIR1))

• 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…35 V

• Signal outputs DC 0...10 V or DC 0...5 V adjustable

• Selectable passive temperature sensing element

1) NDIR = Non dispersive infrared 2) VOC = volatile organic compounds (also called mixed gas)


In ventilation and air conditioning plants to enhance room comfort and optimize energy consumption by providing demand-controlled ventilation. The sensor acquires:

• CO2 concentrations as an indication of occupancy in rooms where smoking is prohibited.

• VOC concentrations as an indication of odors such as tobacco smoke, body odor, or material fumes in the room.

• Relative humidity in the room.

• Room temperature. Sensors QPA10… and QPA20… can be used as a:

• Control sensor.

• Transmitter for building automation and control systems and / or display units (QPA20…D only). Typical use:

• Acquisition of CO2 and VOC concentrations: In party rooms, lounges, fair pavilions and exhibition halls, restaurants, canteens, shopping malls, athletic centers, sales rooms, and conference rooms. 

• Acquisition of CO2 concentrations: In rooms with varying occupancy levels where smoking is prohibited, e.g. museums, theaters, movie theaters, auditoriums, office spaces, and school rooms.


QPA1000 Room VOC Sensor, 0…5V, 0…10V, 0…100%VOC (S55720-S119)
QPA1004 Room CO2 Sensor - Basic, 0…10V, 0…2000ppm; Accuracy ≤± 60 ppm + 4 % of measured value (S55720-S453)
QPA2000 Room CO2 Sensor, 0…10V, 0…2000ppm
QPA2002 Room CO2 + VOC Sensor, 0…10V, 0…2000ppm
QPA2002D Room CO2 + VOC Sensor, 0…10V, 0…2000ppm, LCD Display
QPA2060 Room CO2/Temperature Sensor, 0…10V, 0…2000ppm
QPA2060D Room CO2/Temperature Sensor, 0…10V, 0…2000ppm, LCD Display
QPA2062 Room CO2/Humdity/Temperature Sensor, 0…10V, 0…2000ppm
QPA2062D Room CO2/Humdity/Temperature Sensor, 0…10V, 0…2000ppm, LCD Display
QPA84 Room VOC Controller, ON/OFF
QPA1064 Room CO2/Temperature Sensor - Basic, 0...10V, 0...2000ppm; Accuracy <+ 60 ppm + 4% of measured value (S55720-S454)
QPA2080 Room CO2/Temperature Sensor, 0...2000ppm, Temperature LG-Ni1000 (S55720-S121)