Series CDTR Carbon Dioxide/RH/Temperature Transmitter

NDIR CO2 Sensor, Universal CO2/RH Outputs, Optional Relay

The SERIES CDTR Carbon Dioxide, Relative Humidity and Temperature Transmitters reduce the number of sensors mounted on a wall or in a duct. By combining CO2, RH, and temperature in one device, system integrators are able to reduce installation time while lowering material cost at the same time. Like our popular Series CDT Carbon Dioxide Transmitter, a single beam dual wavelength non-dispersive infrared (NDIR) sensor is used to automatically correct the measurement in both occupied* and unoccupied buildings against light source aging effects. In order to achieve the best possible accuracy, the Series CDTR also includes digital barometric pressure adjustment and the ability to field calibrate the sensor. Universal outputs for both carbon dioxide and relative humidity allow users to select the transmitter output to be 4 to 20 mA, 0 to 5 VDC, or 0 to 10 VDC to work with virtually any building management controller. Additionally, passive thermistor or RTD sensor can be ordered for a temperature output. For applications that require visual indication, the wall mount configurations of the Series CDTR can be ordered with an integral LCD display. The display can be configured to display temperature only, relative humidity only, CO2 only, CO2 and humidity, or CO2 and temperature. Push buttons are standard on all configurations of the transmitters for access to the menu structure. To prevent tampering, the action of the buttons can be locked out using an internal jumper selection.

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

Product Applications

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

Models & Ordering

Filter By

Build Your Custom Part. Use our Product Configurator

Model Description Usually Ships Price Order
CDTR-2N404
Ships: Less Than 1 Week
Price: $210.00
Carbon Dioxide/Humidity, Wall Mount, universal current/voltage output, North American Housing. Less Than 1 Week $210.00 Order
CDTR-2N4A4
Ships: Less Than 1 Week
Price: $215.00
Carbon Dioxide/Temperature/Humidity, Wall Mount, universal current/voltage output, 10K Type III Thermistor Temperature Output, North American Housing. Less Than 1 Week $215.00 Order
CDTR-2N4B4
Ships: Less Than 1 Week
Price: $215.00
Carbon Dioxide/Temperature/Humidity, Wall Mount, universal current/voltage output, 10K Type II Thermistor Temperature Output, North American Housing. Less Than 1 Week $215.00 Order
CDTR-2N4C4
Ships: Less Than 1 Week
Price: $216.00
Carbon Dioxide/Temperature/Humidity, Wall Mount, universal current/voltage output, 3K Thermistor Temperature Output, North American Housing. Less Than 1 Week $216.00 Order
CDTR-2N4D4
Ships: Less Than 1 Week
Price: $216.00
Carbon Dioxide/Temperature/Humidity, Wall Mount, universal current/voltage output, Pt100 RTD Temperature Output, North American Housing. Less Than 1 Week $216.00 Order
CDTR-2N4E4
Ships: Less Than 1 Week
Price: $216.00
Carbon Dioxide/Temperature/Humidity, Wall Mount, universal current/voltage output, Pt1000 RTD Temperature Output, North American Housing. Less Than 1 Week $216.00 Order
CDTR-2N4F4
Ships: Less Than 1 Week
Price: $215.00
Carbon Dioxide/Temperature/Humidity, Wall Mount, universal current/voltage output, 20K Thermistor Temperature Output, North American Housing. Less Than 1 Week $215.00 Order

Can't find what you need? Build Your Custom Part. Use our Product Configurator

Specifications

Range:
CO2: 0 to 2000 or 0 to 5000 ppm (depending on model); Relative humidity: 0 to 100% ; Temperature: 32 to 122°F (0 to 50°C).
Accuracy:
±40 ppm + 3% of reading (CO2); ±2% (RH).
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 minutes for 99% step change.
Temperature Limits:
32 to 122°F (0 to 50°C).
Duct Air Velocity Range:
0-4000 FPM (20.32 m/s).
Humidity Limits:
10 to 95% RH (non-condensing).
Power Requirements:
16 to 35 VDC / 19 to 28 VAC.
Power Consumption:
Average: 2 watts; Peak: 3.75 watts.
Sensor:
Single-beam, dual-wavelength NDIR.
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 2A @ 30 VDC; RTD or thermistor per r-t curves (depending on model).
Weight:
5.6 oz (158.8 g).
Enclosure Rating:
Duct mount: NEMA 4X (IP66) for housing only; Wall mount: IP20.
Agency Approvals:
CE.

Features

  • Digital Intelligence Temperature Compensation Algorithm (DITCA™) eliminates error due to the self heating effects of wall mount combination devices
  • Single beam dual wavelength NDIR CO2 sensor
  • Replaceable humidity/temperature sensors
  • Physical hardware lockout
  • Service display tool available for duct mount and wall mount units without an LCD
  • Relay output option

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 CDTR 2 W 4 0 4 LCD Series CDTR-2W404-LCD, Carbon Dioxide/RH/Temperature Transmitter, gas concentration range 2000 ppm, wall mount, carbon dioxide output 0-5 VDC/0-10VDC/4-20mA, RH output 0-5 VDC/0-10 VDC/4-20 mA, LCD display
SERIES CDTR             Carbon Dioxide/RH/Temperature Transmitter
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      
RH OUTPUT           4   0-5 VDC/0-10 VDC/4-20 mA
OPTIONS             CE
COC
FC
LCD
NBC
RLY
CE Approval (Wall Mount Only)
Certificate of Calibration
Factory Calibration Certificate
LCD Display
No Buttons
Relay Output

Approvals

Photo Downloads

You must be logged in to view this content.
Click here to login to your account.