Telaire T5100-5V-LED
Low-Cost Wall Mount CO2 Transmitter with LED Indicators
See: T5100LED

  • 0-5V (switch selectable) CO2 and Temperature output
  • 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)
  • UIP software compatible for customizations
  • CE, RoHS, REACH and WEEE compliant
  • Lifetime calibration warranty
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Telaire T5100-5V-LED Shown
Product Information
Datasheet 437 KB PDF
Manual 394 KB PDF
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The Telaire T5100-5V-LED Wall Mount CO2 Transmitter with LED Indicators is a new low cost, high performing CO2 transmitter for the building controls market. The Telaire T5100-5V-LED 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.

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. The Telaire T5100-5V-LED Wall mount sensors are used to control a specific area such as a conference room, classroom, meeting hall, etc. The Telaire 5100 Ventostat Wall Mounted CO2 Transmitter are easy to install and have a clean, modern look that suits most indoor environments.

CO2 ABC Logic Self Calibration
The Telaire T51005VLED sensors employ the patented ABC (Automatic Background Calibration) Logic self-calibration system. ABC Logic virtually eliminates the need for manual calibration in applications where the indoor CO2 level drops to outside levels during unoccupied periods (e.g. during evening hours). ABC Logic is a special software routine in the sensor that remembers the background readings for 14 consecutive evenings, calculates if there is a sensor drift, and then corrects for it.

With ABC Logic enabled, the sensor will typically reach its operational accuracy after 25 hours of continuous operation at a condition that is exposed to ambient reference levels. Sensors will maintain accuracy specification with ABC Logic enabled, given that it is at least three times in 14 days exposed to the reference value and this reference value is the lowest concentration to which the sensor is exposed.

Note: Applies when used in typical indoor ambient air.

CO2 Calibration Guarantee
Telaire is serious about minimizing maintenance, so each Telaire T5100 sensor comes with a lifetime calibration guarantee.

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)
Stability <2% of FS over life of sensor (15 years)
Pressure Dependence 0.135% of reading per mm Hg
Certification 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
Display 5 color LED display
Temperature 0 - 50°C active output
Warranty 24 months on mechanical defects
Calibration - lifetime warranty (ABC Logic on.)
Ordering Information
Model Description Buy Online Price
T5100-5V-LED Telaire T5100-5V-LED 0 - 5V Low-Cost Wall Mount CO2 Transmitter with LED Indicators Discontinued
See: T5100LED
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T5100-GN-10V-LED Telaire T5100-GN-10V-LED 0 - 10V Low-Cost Wall Mount CO2 Transmitter with LED Indicator, No Branding Discontinued
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Included Accessories
  • 1 - Screw Set
  • 1 - Mounting Base
  • 1 - User's Manual
Optional Accessories
T1505 Telaire T1505 Water Resistant enclosure Buy Now Sale $157.33
(Reg. $157.32)
T1508 Telaire 1508 Aspiration Box Enclosure Buy Now Sale $131.19
(Reg. $177.62)