Series CDT Carbon Dioxide/Temperature Transmitter

NDIR CO2 Sensor, Universal Outputs, Optional Relay

The SERIES CDT Carbon Dioxide and Temperature Transmitters accurately monitor the CO2 concentration and temperature in indoor environments to help achieve energy savings. For increased sensor accuracy, a single beam dual wavelength nondispersive infrared (NDIR) sensor is used to automatically correct the measurement in both occupied* and unoccupied buildings against light source aging effects. The single beam dual wavelength sensor technology provides the highest level of accuracy compared to Automatic Baseline Correction methods which can unintentionally shift the calibration based on CO2 levels and barometric pressure conditions. In order to achieve a higher level of accuracy, the Series CDT includes digital barometric pressure adjustment and the ability to field-calibrate the sensor. For applications that require visual indication, the wall mount configurations of the Series CDT can be ordered with an integral LCD display. Push buttons are standard on all configurations of the transmitters for access to the menu structure, but wall mount configurations can be ordered without the buttons. To prevent tampering, the action of the buttons can be locked out using an internal dip switch selection.

*For buildings occupied 24 hours per day, it is recommended that calibration be verified every 6 to 12 months depending on application.

Single beam dual-wavelength sensor advantages:

  • Automatically corrects for aging effects in occupied and unoccupied buildings
    • Perfect for hospitals and manufacturing plants that are occupied 24 hours per day
  • Measures actual unfiltered light intensity directly
    • Eliminates error from incorrect assumptions of gas concentration in theoretical logic assumption methods

Product Applications

  • Demand control ventilation in schools, office buildings, hospitals, and other indoor environments
  • LEED® certification

Models & Ordering

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Model Description Usually Ships Price Order
CDT-2N40
Ships: Same Day
Price: $165.00
Carbon Dioxide, Wall Mount, universal current/voltage output, North American Housing. Same Day $165.00 Order
CDT-2N44
Ships: Same Day
Price: $175.00
Carbon Dioxide/Temperature, Wall Mount, universal current/voltage output, North American Housing. Same Day $175.00 Order
CDT-2N4A
Ships: Less Than 1 Week
Price: $170.00
Carbon Dioxide/Temperature, Wall Mount, universal current/voltage output, 10K Type III Thermistor Temperature Output, North American Housing. Less Than 1 Week $170.00 Order
CDT-2N4B
Ships: Less Than 1 Week
Price: $170.00
Carbon Dioxide/Temperature, Wall Mount, universal current/voltage output, 10K Type II Thermistor Temperature Output, North American Housing. Less Than 1 Week $170.00 Order
CDT-2N4C
Ships: Less Than 1 Week
Price: $171.00
Carbon Dioxide/Temperature, Wall Mount, universal current/voltage output, 3K Thermistor Temperature Output, North American Housing. Less Than 1 Week $171.00 Order
CDT-2N4D
Ships: Less Than 1 Week
Price: $171.00
Carbon Dioxide/Temperature, Wall Mount, universal current/voltage output, Pt100 RTD Temperature Output, North American Housing. Less Than 1 Week $171.00 Order
CDT-2N4E
Ships: Less Than 1 Week
Price: $171.00
Carbon Dioxide/Temperature, Wall Mount, universal current/voltage output, Pt1000 RTD Temperature Output, North American Housing. Less Than 1 Week $171.00 Order
CDT-2N4F
Ships: Less Than 1 Week
Price: $170.00
Carbon Dioxide/Temperature, Wall Mount, universal current/voltage output, 20K Thermistor Temperature Output, North American Housing. Less Than 1 Week $170.00 Order

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Specifications

Sensor:
Single beam, dual-wavelength NDIR.
Range:
CO2: 0 to 2000 or 0 to 5000 ppm (depending on model); Temperature: 32 to 122°F (0 to 50°C).
Accuracy:
CO2: ±40 ppm ±3% of reading; RH: ±2% (10 to 90% RH); Temperature: ±1°C @ 25°C.
Temperature:
±1°C @ 25°C.
Temperature Dependence:
±8 ppm/°C at 1100 ppm.
Non-Linearity:
16 ppm.
Pressure Dependence:
0.13% of reading per mm of Hg.
Response Time:
2 min for 99% step change.
Duct Air Velocity Range:
0-4000 FPM (20.32 m/s).
Temperature Limits:
32 to 122°F (0 to 50°C).
Humidity Limits:
10 to 95% RH (non-condensing).
Power Requirements:
16 to 35 VDC or 19 to 28 VAC.
Power Consumption:
Average: 2 w; Peak: 3.75 w.
Output:
Current: 4 to 20 mA (max 500 Ω); Voltage: 0 to 5 VDC or 0 to 10 VDC (min 500 Ω);
Relay: SPST NO 2 A @ 30 VDC;
Weight:
4.4 oz (125 g).
Enclosure Rating:
Duct mount: NEMA 4X (IP66) for housing only; Wall mount: IP20.
Agency Approvals:
CE.

Features

  • Single beam dual wavelength NDIR sensor eliminates draft due to light source aging
  • Integral passive temperature outputs reduce number of devices mounted in the space
  • Service display tool available for models without an integral LED
  • Optional integral display and relay output

Accessories

Model Number Description Usually Ships Price Order
Remote display with mini USB display. A-449 Remote display with mini USB display. Same Day $50.00 Order
Gas Calibration Kit <br><b>
(GROUND SHIPMENTS ONLY)</b> GCK-200CO-2000CO2 Gas Calibration Kit
(GROUND SHIPMENTS ONLY)
Same Day $345.00 Order
A-CDT-KIT Accessory kit including terminal block and power supply. Same Day $35.00 Order

Videos

Model Chart

EXAMPLE CDT 2 W 4 0 LCD Series CDT-2W40-LCD, Carbon Dioxide Transmitter, gas concentration range 200 ppm, wall mount, carbon dioxide output 0-5 VDC/0-10VDC/4-20mA, LCD display
SERIES CDT           Carbon DioxideTransmitter
GAS CONCENTRATION RANGE   2
5
        2000 ppm
5000 ppm
MOUNTING CONFIGURATION     W
D
E
N
      Wall Mount
Duct Mount
European Wall Mount
North American Wall Mount
CARBON DIOXIDE OUTPUT       4     0-5 VDC/0-10 VDC/4-20mA
TEMPERATURE OUTPUT         0
4
A
B
C
D
E
F
  NONE                        
0-5 VDC/0-10 VDC/4-20 mA
10K OHM Type 3 NTC Thermistor
10K OHM Type 2 NTC Thermistor
3K OHM NTC Thermistor
PT100 OHM RTD               
PT1000 OHM RTD              
20K OHM NTC Thermistor
OPTIONS           CE
COC
FC
LCD
NBC
RLY
CE Approval (Wall Mount only)
Certificate of Calibration
Factory Calibration Certificate
LCD Display
No Buttons (Wall Mount only)
Relay Output

Approvals

Photo Downloads

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