Starting at $326.77 Starting at $261.42
  • Usually ships in 1-2 weeks



  • Non-dispersive infrared (NDIR) sensor
  • Measurement Range: 0 to 2000 ppm
  • Accuracy: 30 ppm or 3% of reading (whichever is higher)
  • Color LEDs in dot mode indicate the CO2 level
  • Patented, Absorption Infrared Gas sensing engine provides high accuracy in a compact low cost package
  • Patented ABC Logic™ self-calibration system eliminates the need for manual calibration in most applications
  • Lifetime CO2 calibration guarantee when using ABC Logic™
  • Mounting plate with two-piece terminal blocks provide quick, easy wiring
  • Gas permeable, water resistant CO2 diffusion filter prevents particulate and water contamination of the sensor
  • Locking screw secures cover and sensor to the mounting bracket for tamper resistance
  • Sensors are shipped factory calibrated
  • Modern enclosure
  • Low-cost
  • Reliable (20 years of low-cost infrared sensor manufacturing)
  • Available CO2 and Temperature output options: Voltage 0-10V or 0-5V (switch selectable) Or current 4-20 mA
  • UIP software compatible for customizations
  • CE, RoHS, REACH and WEEE compliant
  • Lifetime calibration warranty


The Telaire T5100-LED series is a new low cost, high performing CO2 transmitter for the building controls market. It works seamlessly with building automation systems, and allows you to simply and effectively control fresh air into a ventilated space to regulated standards, providing immediate energy savings.

With a range of 0 to 2000 ppm and an accuracy of 30 ppm or 3% of reading (whichever is higher), the T5100-LED incorporates color LEDs to indicate the CO2 level.