CO2 and temperature transmitters

For sensing or controlling of CO₂ concentration; and temperature measurement in buildings.

Output signal

the following output signals are applicable:

•	0(2)..10 Vdc or 0(4)..20 mA for 0..2000/3000 ppm CO₂
•	0(2)..10 Vdc or 0(4)..20mA for 0..50 ^oC
•	relay output with adjustable CO₂ setpoint and hysteresis for ventilation on/off

Power supply

24 Vac | 2 VA

Additional description

•	Models with LCD available for CO₂ concentration or temperature reading.
•	Contact input for occupancy detection.
•	RS232-port for connection with PC for parameter settings.
•	Service interval 5 years, according 89/336EEC.

Mounting place	Model	Protection class	Type
internal wall	without LCD	IP30	AQS51
internal wall	with 7-segment LCD	IP30	AQS61

Mounting place

Model

Protection class

Type

air duct

without LCD

IP65

AQS51-KAM

air duct

with 7-segment LCD

IP65

AQS61-KAM

Description	Additional Product Type
CO₂ test set with gas generator for 0 ppm calibration	AQS-F0005
Interface cable to PC	AQS3/4CABLE
Service software for parameter settings	AQSPC