Sensors That Make Buildings Smart!
Reference on AirTest: Understanding The Parking Garage Opportunity
CO2 Reference Library
Background on Carbon Monoxide Sensing Technologies for Parking Garages
Using CO2 to Control Odors in Parking Facilities
Carbon Dioxide Characteristics
CT1000 Layout
CT1000 Wiring
CT1000 Figure 1
CT1000 Figure 3

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Model CT1000


  • On/Off control of fans using CO, combustibles and NO2
  • Indoor automobile parking, service garages, arenas, fire stations, loading docks, warehouses, boiler rooms
  • Typically one sensor will cover an area of 5,000 to 8,000 sq ft.


Key Features

  • Integrated solid-state sensor versions available to measure CO, and Combustibles.
  • Control module can also be used with remote electrochemical Transmitters such as the TR2000 (CO), TR3210-NO2 and TR5200 (Combustibles).
  • Versions available for 24 VAC, 110VAC and 220VAC
  • Multiple units can be wired in parallel to control over a large area.
  • Two 5 amp relays for fan and alarm activation.
  • User adjustable on-time delay and set point dead band
  • Very rugged metal case



  • integrated gas sensing options include solid state detection of CO, Combustibles, R22, R134a, Ammonia
  • other gas sensing options require remote sensor mounting from control

CT1000 Controller
CO, Combustibles
(solid state)
Or Remote: CO, NO2, Combustibles


  • Temp Range: -4 to 122F (-20 to 50C)
  • Integrated high and low concentration relays (5A)
  • Power: 24 VAC, 115 VAC, 220 VAC
  • User adjustable delay for on-time (up to 30 minutes)
  • Measures: 0-400 ppm

Wiring Multiple Transmitters
Published: February 16, 2004 Last Updated: April 26, 2013