Air quality CO2 transmitter

VC logo co2.jpg

VC logo analog output.jpg


The CO2 concentration is measured through non-dispersive infrared (NDIR) waveguide technology with ABC automatic background calibration algorithm. The applied measuring technology guarantees excellent reliability and long term stability. The microprocessor samples the CO2 once per second. It calculates an averaging signal over a preset number of seconds and generates the output signal. 

Standard signal ranges are 0-10 VDC, 2-10 VDC, 4-20 mA and 0-20 mA. Other ranges can be defined by using the external display and programming module OPA-S / OPU-S.



  • Demand based ventilation for homes and offices based on measurement of the CO2 concentration
  • Preset standard measuring range 0...2000 ppm, max possible range 0...5000 ppm
  • Recording of minimum and maximum limits for critical environments
  • Direct ventilation control of extraction fan
  • Air measurement
  • Zone control

   1  V+  AC 24 V 50-60 Hz, DC +24 V ± 10%
   2  GND  AC 0 V, DC 0 V
   3  AO1  CO2, DC 0(2)...10 V, DC 0(4)...20 mA


Dimensions mm (inch) 


  • CO2 measurement over external probes (for air ducts, …)
  • Minimum and maximum value memory
  • 0...10 V, 0...20 mA or 2...10 V. 4...20 mA measuring signals selectable with jumpers
  • Optional alternative signal ranges programmable
  • May be used as simple P-controller
  • Selectable averaging signal
  • Optional external display (OPA-S / OPU-S)
  • Status LED


 Product name  Product No.  Description
 SCC-C1  40-300249  CO2 transmitter with tube connectors for external air probe


OPA-S - Remote Display
Operation and display for intelligent transmitters
OPU-S - Remote Display
Operation and display for intelligent transmitters
AMP-1 - Pressure Probs
Differential Pressure Probe Kit
AMC-2 - Conduit Connector
For indoor, outdoor and duct transmitters


Operation Manual

Install Sheet

Application Notes