Telaire® Duct
Mount Sensor
Telaire Ventostat®
T8031 CO2 Duct Mount
Transmitter
Amphenol Advanced Sensors is excited to
announce the release of a new generation of
Telaire CO2 transmitters targeting indoor air
quality and energy conservation applications. The
Ventostat® T8031 duct mount CO2 transmitter
offers accuracy and versatility at an affordable
price. This exceptional product line touts an
unobtrusive form factor that is easy to install,
simple to use, and remains accurate over the
expected life of the device using Telaire’s patented
ABC Logic™ (Automatic Background Calibration)
technology.
Application
CO2 transmitters can be used in a broad range of
applications, including air quality monitoring in
buildings. CO2 concentration levels in buildings are
monitored to provide an indication of occupancy
and to drive a ventilation control strategy. An
effective DCV (Demand Controlled Ventilation)
strategy will conserve energy and maintain indoor
air quality.
Features
• One of the smallest in-duct CO2 transmitters
on the market
• Simple installation (mounting hardware and
instructions included)
• Ideally suited for OEM manufacturers that
must accommodate smaller < 6 in (15.2 cm)
HVAC return air ducts.
• Offers standard 0-10 volt 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
• Gas permeable, water-resistant diffusion
filter prevents particulate and water
contamination of the sensor
• Lifetime calibration guarantee
Amphenol
Advanced Sensors
®
Model T8031
Specifications
Description
Telaire Ventostat® T8031 CO2 duct mount
transmitter is the smallest package available.
The T8031 is a CO2 transmitter designed to be
installed in HVAC return air ducts. The size of the board
and the dimensions of the case have been optimized
to place the transmitter in small, i.e. 6 inch [15.24 cm]
diameter, return air ducts. This product offers a sleek
design, a simple analog output, and it is easy to install.
The transmitter includes mounting hardware and
installation instructions.
Measurement Range
0-2000 ppm factory calibrated
Duct Air Velocity
0 to 1500 ft/min (0-450 meter/min)
Temp Dependence
0.2% of full scale per ºC
*Accuracy
±40 ppm +3% of reading @ 22ºC (72ºF) when compared
with a factory certified reference
Non-linearity
<1% of full scale @ 22ºC (72ºF)
Pressure Dependence
0.13% of reading per mm of mercury
*Calibration
Sensors will be calibrated at zero and span at the
factory. Calibration in the field will not be required.
Sensors will be shipped with ABC Logic™ turned on.
Response Time
Three minutes typical for 90% step change at low duct
speeds
Warm-up Time
< Two minutes (operational); 10 minutes to achieve
maximum accuracy
Operating Conditions
• Temperature: 0ºC to 50ºC (32ºF to 122ºF)
• Humidity: 0 to 95% relative humidity,
non-condensing
Storage Conditions
-20ºC to 70ºC (-4ºF to 158ºF)
Certifications
RoHS compliance
FCC Part 15,B
CE EMC EN61000-6-2, class B, criterion B*
*Deviations of the output signal may occur during
strong electrical fast transients on the power line
Enclosure ammability rating – UL94-5VA
Output
Analog 0 to 10 VDC (100 ohm output impedance)
Power Supply Requirements
18 to 30 VAC RMS, 50/60 Hz or 18 to 42 VDC, polarity
protected.
Power Consumption
Typical values (1.65 watts peak, 0.65 watts avg.
@ 42 VDC)
*Note: The Telaire product line offers patented ABC
Logic™ software for self correction of drift to better
than ±20 ppm per year. The system is virtually free of
maintenance and typically has a lifetime of more than
10 years.
Physical Requirements
Dimensions:
Length: 3.83 in (9.72 cm) +
0.74 in (1.87 cm) mounting tab
Width: 1.17in (2.97 cm)
Height: 0.94 in (2.38 cm)
Color: 701 Black
Flammability Classication: UL 94V-5
AAS-920-377C-03/2014
www.amphenol-sensors.com
© 2014 Amphenol Corporation. All Rights Reserved. Specifications are subject to change without notice.
Other company names and product names used in this document are the registered trademarks or
trademarks of their respective owners.
Amphenol
Advanced Sensors
Sensor Optics
µController
T8031 CO2 Sensor
Power
Supply
Red Wire
Input Power
18 VDC to 42
VDC or
18 VAC to 30 VAC
RMS
50/60 Hz
Violet Wire
Analog Out
(0 to 10 VDC)
(0 to 2000 PPM)
Common Black Wire
