DUCT CARBON DIOXIDE TRANSMITTER

CD2DT Series - Duct Carbon Dioxide Transmitter

The duct CO2
transmitter uses a highly accurate and
reliable non-dispersive infrared (NDIR) sensor in an
attractive enclosure with a gasketed, hinged cover
for duct applications to monitor CO2
levels. The
sensor uses dual wavelength optics and LTA (long
term adjustment) signal processing technology
to deliver industry leading long term accuracy
and reliability. These features ensure optimum
measurement stability for continual monitoring of
either supply or return air measuring.
Optional features include a resistive temperature
sensor output (with LCD display of temperature in
either °C or °F), a control relay with programmable
setpoint, hysteresis and time delay, and either a
conduit or cable gland connection point.

TYPICAL INSTALLATION
For complete installation and wiring details,
please refer to the product installation
instructions.
The duct type sensor installs on the outside of a
return air duct with the sampling tube inserted into
the duct. Mount the sensor in an easily accessible
location in a straight section of duct at least five
feet from corners and other items that may cause
disturbances in the air flow. Avoid areas with
vibrations or rapid temperature changes.
The enclosure provides mounting tabs for ease of
installation.

PART NUMBER
CD2DT
ORDERING
PRODUCT CD2DT Duct Carbon Dioxide Transmitter
ENCLOSURE B Polycarbonate with hinged and gasketed cover
F Same as B, with thread adapter (1/2” NPT to M16) and cable gland fitting
OPTIONAL TEMPERATURE SENSOR XX None
02 100Ω Platinum, IEC 751, 385 Alpha, thin film
05 1801Ω NTC Thermistor, ±0.2°C
06 3000Ω NTC Thermistor, ±0.2°C
07 10,000Ω Type 3, NTC Thermistor, ±0.2°C
08 2.252KΩ NTC Thermistor, ±0.2°C
12 1000Ω Platinum, IEC 751, 385 Alpha, thin film
13 1000Ω Nickel, Class B, DIN 43760
14 10,000Ω Type 3, NTC Thermistor, ±0.2°C c/w 11,000 shunt resistor
20 20,000Ω NTC Thermistor, ±0.2°C
24 10,000Ω Type 2, NTC Thermistor, ±0.2°C
59 10,000 Ω, 25°C, ±1%, B = 3435 ±1% (25/85)
OPTIONAL RELAY X None
R Adjustable Relay
ACCESSORIES CDD1-CALKIT-GS Calibration kit (Gas not included) for calibrating CD & CDD series CO2 Transmitters
2025 Apr 3rd

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