®
Ventostat
Wall Mount
®
Telaire Wall Mount
CO
2
, Humidity and
Temperature Transmitters
Features:
• 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 CO
2
calibration guarantee when using
ABC Logic™.
• Mounting plate with two-piece terminal blocks
provide quick, easy wiring.
• Gas permeable, water resistant CO
2
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 CO
2
.
• BACnet™ output versions
• Sensors are shipped factory calibrated.
• Temperature sensor on all models.
• Modern enclosure with customized branding
available.
• CO
2
, humidity and temperature models.
• Two-piece design allows unit to be replaced
without the need for rewiring.
Amphenol
Advanced Sensors
Controlled Ventilation
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 CO
2
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 CO
2
-based ventilation control in
different commercial HVAC applications. Some utility
companies also offer rebates to building owners for
installing CO
2
sensors.
Wall mount sensors are used to control a specific 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 CO
2
sensor included.
T8100 — uses a single channel sensor using Telaire
patented ABC Logic for lifetime calibration. Single-
channel sensors are used in spaces where there is not
full-time occupation (most applications).
T8200 — 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.
T8300 — uses a single channel sensor with pitot tube kit
for duct measuring of CO
2
. ABC Logic enabled.
Notes:
1. This product is intended to be used in occupied building
HVAC applications.
2. This product is not designed or intended for use in safety
critical functions.
Ordering Information
Examples:
T8100-D ABC Logic, display
T8100-D-BAC ABC Logic, display,BACnet
T8200-HD Dual channel, Humidity, Display
T8300-BAC ABC Logic, pitotot tube, BACnet
T8100-DB ABC Logic, display, black case
T8
100, 200, 300
Humidity (H) Display (D) Color (B, W) Range (5P, 10P) BACnet (BAC)
T8
Note: Not all combinations are available, i.e., T8300 with humidity. Please see www.ventostat.com to see the latest
list of available part numbers.
Note: T8100-5P-R versions are conformally coated.
Black versions are for applications such as movie theaters
2
Wall Mount Specifications
Sensing Method
• Non-dispersive infrared (NDIR) absorption
• Gold-plated optics
• Patented ABC Logic self calibration algorithm
CO
2
Warm-up Time
• < 2 minutes (operational)
• 10 minutes (maximum accuracy)
CO
2
Measurement Range
Operating Conditions
• 32°F to 122°F (0°C to 50°C)
• 0 to 95% RH, non-condensing
T8100/T8200/T8300
0 to 2000 ppm (0 ppm = 0 V, 4 mA;
2000 ppm = 10/5V, 20 mA)
T8100/T8200/T8300 - 5P models
0 to 5000 ppm (0 ppm = 0 V, 4 mA;
5000 ppm = 10/5V, 20 mA)
T8200 (10P models) 0 to 10,000 ppm
(0 ppm = 0 V, 4 mA; 10,000 ppm = 10/5V, 20 mA)
T8200 (20P models) 0 to 20,000 ppm
(0 ppm = 0 V, 4 mA; 20,000 ppm = 10/5V, 20 mA)
Storage Conditions
-40°F to 158°F (-40°C to 70°C)
Flammability Classification
UL94 5VA
Passive Thermistor Type (not Bacnet version)
NTC 10 K W thermistor
CO
2
Accuracy
± 30ppm or 3% of the reading shown, whichever is higher *
Thermistor Accuracy
±1°C (15° to 35°C)
Power Supply Requirements
18-30 VAC RMS, 50/60 Hz, or 10.8 to 42 VDC,
polarity protected
RH Sensing Element
Capacitive polymer sensor
Power Consumption
Typical 0.7 W at nominal voltage of 24V AC RMS
RH Range
0% to 99% RH (non-condensing)
Temperature Dependence
0.2% FS per °C (±0.11% per °F)
RH Accuracy (25°C)
±2.5% RH (20 to 80% RH)
±3.5% RH (<20% and >80% RH)
Stability
T8100/T8300 - Single Channel
<2% of FS over life of sensor (15 years)
Active Temperature Accuracy
±0.8°C @ 22°C
T8200 - Dual Channel
<5% of FS or <10% reading annual over life of sensor
(10 years)
Active Temperature Range
32°F to 122°F (0 to 50°C)
Note: Active analog output standard and only available on
T8100-R and T8100-H versions.
Pressure Dependence
0.135% of reading per mm Hg
Warranty
24 months on mechanical defects
Calibration - lifetime warranty for T8100 and T8300 series
Output
Analog Version
• 0 to 10 V (100 W output impedance) and
• to 20mA (R
L
maximum 500 W) available simultaneously
4
Certifications
CE and RoHS compliant
BACnet Version
• MS/TP
• RS485
• Baud rates 38400 or 9600
Signal Update
Every 5 seconds
*C0
2
accuracy statement excludes standard gas used for
calibration that has an accuracy of 2%. In addition, there
is a potential digital to analog error of up to 1%.
3
Note: Applies when used in typical indoor ambient air.
Consult Telaire if other gases or corrosive agents are
part of the application environment.
CO
2
Calibration Guarantee
Telaire 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.
Ventostat wall mount dimensions
Sensor Accuracy & Field 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 CO
2
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
specifications 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.
The T8200 dual channel sensor can be described as
a CO
2
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 CO
2
. The calibration time is
adjustable but nominally two minutes.
Telaire 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.
T8200 – Dual Channel
CO
2
ABC Logic Self Calibration
4
Multi Measurement
Display versions scroll between ppm CO
2
, %RH Humidity and °F Temperature when the option is selected.
Wiring Features
Non-Display Wiring
No display, basic functionality for CO
2
and passive
thermistor only.
Display Wiring
Digital display, functions of CO
2
and thermistor are
standard. Humidity and active temperature options
are available. Display scrolls all measurements that are
included.
®
®
Non-Display Wiring
Display Wiring
BACnet Wiring
5
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