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T: 514-354-2511
T: 1 800 463-4363
F: 514-354-6948
Wall CO2 Monitor Environment

Wall CO2 Monitor

Product Code:Ventostat 8000

Need more Info? (514) 354-2511 - 1-800-463-4363

Telaire Wall Mount CO2, Humidity and Temperature Transmitters


  • 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 difusion ilter 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.


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 luctuates during a 24-hour period. Numerous organizations now require and/or recommend CO2- based ventilation control in diferent commercial HVAC applications. Some utility companies also ofer rebates to building owners for installing CO2 sensors.

Wall mount sensors are used to control a speciic area such as a conference room, classroom, meeting hall, etc. The Telaire 8000 Ventostat series are easy to install and have a clean, modern look that suits most indoor environments.

The Telaire 8000 Ventostat series is available in a number of configurations. The primary configuration is determined by the type of CO2 sensor included.

T8100 — uses a single channel sensor using Telaire patented ABC Logic for lifetime calibration. Singlechannel sensors are used in spaces where there is not full-time occupation (most applications).

T8200 — uses a dual-channel optical system and threepoint calibration process for enhanced stability, accuracy and reliability. Used in applications where there is fulltime occupation 24 hours a day.

T8300 — uses a single channel sensor with pitot tube kit for duct measuring of CO2. ABC Logic enabled


Black = ‘B’
White = ‘W’
Yes = ‘Y’
No = ‘N’

Note: 0-10 or 0-5V and 4-20 mA outputs for CO2 concentration are available simultaneously. The 0-10 or 0-5V or 4-20 mA for Active Temp and RH % (when RH is ordered) outputs are jumper selectable and are not available simultaneously. 


Sensing Method
• Non-dispersive infrared (NDIR) absorption
• Gold-plated optics
• Patented ABC Logic self calibration algorithm

CO2 Measurement Range
T8100/T8300 - Single Channel 0 to 2000 ppm (0 ppm = 0 V, 4 mA)

T8200 - Dual Channel 0 to 2000 ppm (0 ppm = 0 V, 4 mA)

CO2 Accuracy
T8100/T8300 - Single Channel
• 400-1250 ppm ± 30 ppm +3% of reading, whichever is greater*,**
• 1250-2000 ppm ±5% of reading + 30ppm *, **

T8200 - Dual Channel
• 75 ppm or 10% of reading (whichever is greater)

*Tolerance based
** ABC Logic not d oena cstpivaant egdas of ±2%

Power Supply Requirements
18-30 VAC RMS, 50/60 Hz, or 18 to 42 VDC,polarity protected

Power Consumption
Typical 0.7 W at nominal voltage of 24V AC RMS

Temperature Dependence
0.2% FS per °C (±0.11% per °F)
T8100/T8300 - Single Channel <2% of FS over life of sensor (15 years)

T8200 - Dual Channel
<5% of FS or <10% reading annual over life of sensor (10 years)

Pressure Dependence
0.135% of reading per mm Hg

24 months on mechanical defects Calibration - lifetime warranty for T8100 and T8300 series

CE and RoHS 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 Classiication
UL94 5VA

Thermistor Type
NTC 10 K W thermistor

Thermistor Accuracy
±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
32°F to 122°F (0 to 50°C)


• 0 to 10 V (100 W output impedance) and
• 4 to 20mA (RL maximum 500 W) available simultaneously
• Digital to Analog Error ±1% CE and RoHS compliant


CO2 ABC Logic Self Calibration
T8100 and T8300 single channel 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 speciications 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. Consult GE if other gases or corrosive agents are part of the application environment.

CO2 Calibration Guarantee
GE is serious about minimizing maintenance, so each single-channel sensor (T8100/T8300) comes with a lifetime calibration guarantee. And each dual channel sensor has a two-year calibration guarantee (T8200).

Calibration Interval
For T8100 and T8300 series, no calibration is required due to ABC Logic. For T8200 series, annual calibration is recommend for the best accuracy. However, most applications using T8200 series could extend the calibration interval. For the humidity sensor, no calibration is required. Replacement humidity sensors are available. If a Telaire 8000 series single channel sensor drifts out of calibration range, it can be sent back to Telaire for a free factory calibration. Further information on the guarantee is available on our website.

T8200 – Dual Channel
The 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 selfcalibrations 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 ield calibration using nitrogen gas or alternatively ambient calibration will immediately restore the highest level of accuracy. Refer to the calibration manual for details. Ventostat wall mount dimensions 


Multi Measurement

Display versions scroll between ppm CO2, %RH Humidity and °F Temperature when the option is selected.



Wiring Features

Non-Display Wiring

No display, basic functionality for CO2 and passive thermistor only.

Display Wiring

Digital display, functions of CO2 and thermistor are standard. Humidity and active temperature options are available. Display scrolls all measurements that are included.

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