· Maintenance-free CO2 sensing element (depending on the 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 or 4...20 mA adjustable

· Selectable passive temperature sensing element

In air ducts of ventilation and air conditioning plant to enhance room comfort and to

optimize energy consumption by providing demand-controlled ventilation. The sensor

acquires:

· CO2 concentrations

· VOC concentrations as an indication of odors in the duct air, such as tobacco smoke,

body odor, or material fumes

· The relative humidity of the duct air

· The duct air temperature

Sensors QPM1100 and QPM21… can be used as a:

· Control sensor in the supply or extract air duct

· Transmitter for building automation and control systems and / or display units

(QPM21…D only).

Typical use:

· Acquisition of CO2 and VOC concentrations:

In party rooms, lounges, fair pavillions and exhibition halls, restaurants, canteens,

shopping malls, sports gymnasiums, sales rooms, and conference rooms

· Acquisition of CO2 concentrations:

In ventilation plant of rooms with varying occupancy levels where smoking is prohibited,

such as museums, theatres, movie theatres, auditoriums, office spaces and

school rooms

· The QPM21… sensors are not suited for use as safety devices, such as gas or

smoke warning devices!

· The sensors must not be used outdoors!