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Telaire T8200-DB
Dual Channel Wall Mount CO2, Humidity & Temperature Sensor

  • 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
  • Dual simultaneous analog outputs (V & mA) available for CO2
  • Sensors are shipped factory calibrated
  • Temperature sensor on all models
  • Modern enclosure with customized branding available
  • CO2, humidity and temperature models
  • Two-piece design allows unit to be replaced without the need for rewiring
Click for larger image of the Telaire T8200DB Ventostat Wall-Mount Dual Channel CO2 Sensor, LCD display, BlackClick for larger image
Telaire T8200-DB Shown
Product Information
Datasheet 333 kB
CO2 Guide 54 kB
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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 T8200 Ventostat series are easy to install and have a clean, modern look that suits most indoor environments.

GE Telaire Ventostat T8200 CO2 duct mount transmitter uses a dual-channel optical system and three-point calibration process for enhanced stability, accuracy and reliability. Used in applications where there is full-time occupation 24 hours a day.

Dual Channel Sensor
The GE Telaire T8200 dual channel sensor can be described as a CO2 channel that measures gas concentration and a reference channel that measures the sensor signal intensity. The dual channel sensor performs periodic self-calibrations using the reference channel. The self-calibrations are approximately every 24 hours. During the self-calibration the sensor ppm reading is frozen, it will not react to changing CO2. The calibration time is adjustable but nominally two minutes.

GE recommends periodic gas calibration depending on the application accuracy requirements. While the reference channel corrects for changes over time, a field calibration using nitrogen gas or alternatively ambient calibration will immediately restore the highest level of accuracy. Refer to the calibration manual for details.

Features Details
CO2 Measurement Range 0 to 2000ppm (0ppm = 0V, 4 mA)
CO2 Accuracy 75 ppm or 10% of reading (whichever is greater)
Power Supply Requirements 18-30 VAC RMS 50/60 Hz
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 <5% of FS or <10% reading annual over life of sensor (10 years)
Pressure Dependence 0.135% of reading per mm Hg
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
Thermistor Type ±1°C (15° to 35°C)
RH Sensing Element Capacitive polymer sensor
RH Range 0% to 99% RH (non-condensing)
RH Accuracy (25°C) ±2.5% RH (20 to 80% RH)
±3.5% RH (<20% and >80% RH)
Active Temperature Accuracy ±0.8°C @ 22°C
Active Temperature Range 0 to 50°C
Output (analog) 0 to 10 V (100 W output impedance)
4 to 20mA (RL maximum 500 W) available simultaneously
Digital to Analog Error ±1%
Ordering Information
Model Description Buy Now Price
T8200-DB Telaire T8200DB Ventostat Wall-Mount Dual Channel CO2 Sensor, LCD display, Black Buy Now Sale $354.07
(Reg. $380.16)