Telaire T5100-LED Series


Low-Cost Wall Mount CO2 Transmitter

The new 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.

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  • 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
  • Two enclosure sizes for regional acceptance


Ventilation is an important part of maintaining a comfortable, healthy, productive environment for people. Improper ventilation can have a negative impact on occupant health and performance, increase the risk from litigation, and/or waste energy. Demand-controlled ventilation using CO2 sensors prevents energy losses from over-ventilation while maintaining indoor air quality. The most energy savings potential is in buildings where occupancy fluctuates during a 24-hour period.

Numerous organizations now require and/or recommend CO2- based ventilation control in different commercial HVAC applications. Some utility companies also offer rebates to building owners for installing CO2 sensors. Wall mount sensors are used to control a specific area such as a conference room, classroom, meeting hall, etc. The Telaire 5000 Ventostat series are easy to install and have a clean, modern look that suits most indoor environments.


Sensing Method

• Non-dispersive infrared (NDIR) absorption

• Gold-plated optics

• Patented ABC Logic self calibration algorithm

CO2 Measurement Range

0 to 2000 ppm
(0 ppm = 0 V, 4 mA)

CO2 Accuracy

±30 ppm or 3% of the reading shown, whichever is higher *

Active Temperature Accuracy /Range

0-50°C (32-122°F)
±1°C from 15-30°C (±1.8°F from 59 to 86°F)

Power Supply Requirements

18-30 VAC RMS, 50/60 Hz, or 18 to 42 VDC,

polarity protected

*AHRAE — regulation 62 states maximum indoor CO2 level of 1000 ppm

Power Consumption

Typical 0.7 W at nominal voltage of 24V AC RMS

Temperature Dependence

0.2% FS per °C (±0.11% per °F)


<2% of FS over life of sensor (15 years)

Pressure Dependence

0.135% of reading per mm Hg


CE EMC, RoHS, REACH and WEEE compliant


24 months on mechanical defects Calibration - lifetime warranty (ABC Logic on.)


CE EMC, RoHS, REACH and WEEE compliant

Signal Update

Every 5 seconds

CO2 Warm-up Time

< 2 minutes (operational)

10 minutes (maximum accuracy)

Operating Conditions

32°F to 122°F (0°C to 50°C)

0 to 95% RH, non-condensing

Storage Conditions

-40°F to 158°F (-40°C to 70°C)

Flammability Classification

UL94 5VA


5 color LED display (T5100-LED models only)


0-50C active output (T5100-LED models only)




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