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Documents: CDTR-2D4A4

AQ-CDTR Duct Mount Manual (Pre April 2022)AQ-CDTR Duct Mount Manual (Post April 2022)AQ-CDTR-N Wall Mount Manual (Pre April 2022)AQ-CDTR-N Wall Mount Manual (Post April 2022)Series CDTR Catalog Page CDTR More Info

CDTR-2D4A4 | Carbon Dioxide/RH/Temperature Transmitter | 2000 ppm CO2 range | duct mount | 4 to 20 mA/0 to (5 or 10) VDC CO2 output | RH outputs & 10 kΩ Type 3 thermistor temperature output. | Dwyer

Carbon Dioxide/RH/Temperature Transmitter, 2000 ppm CO2 range, duct mount, 4 to 20 mA/0 to (5 or 10) VDC CO2 output, RH outputs & 10 kΩ Type 3 thermistor temperature output.

Brand: DwyerSKU: CDTR-2D4A4

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Overview Details for CDTR-2D4A4

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Carbon Dioxide/RH/Temperature Transmitter | 2000 ppm CO2 range | duct mount | 4 to 20 mA/0 to (5 or 10) VDC CO2 output | RH outputs & 10 kΩ Type 3 thermistor temperature output.

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 timewhile lowering material cost at the same time.Like our popular Series CDT Carbon Dioxide Transmitter, a single beam dualwavelength non-dispersive infrared (NDIR) sensor is used to automatically correct themeasurement in both occupied* and unoccupied buildings against light source agingeffects. In order to achieve the best possible accuracy, the Series CDTR also includesdigital barometric pressure adjustment and the ability to field calibrate the sensor.Universal outputs for both carbon dioxide and relative humidity allow users to selectthe transmitter output to be 4 to 20 mA, 0 to 5 VDC, or 0 to 10 VDC to work withvirtually any building management controller. Additionally, passive thermistor or RTDsensor can be ordered for a temperature output.For applications that require visual indication, the wall mount configurations of theSeries CDTR can be ordered with an integral LCD display. The display can beconfigured to display temperature only, relative humidity only, CO2 only, CO2 andhumidity, or CO2 and temperature. Push buttons are standard on all configurations ofthe transmitters for access to the menu structure. To prevent tampering, the action ofthe buttons can be locked out using an internal jumper selection.

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

For models with resistive thermistors or RTD outputs, please click here for temperature to resistance lookup tables.

Product Applications

Demand control ventilation in schools, office buildings, hospitals, and other indoorenvironments
LEED® certification

Digital Intelligence Temperature Compensation Algorithm (DITCA™) eliminates errordue 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

Specifications

Series: CDTR CARBON DIOXIDE/RH/TEMPERATURE TRANSMITTER
Category/Type: Air Quality
Type: Carbon Dioxide Transmitters
Series: CDTR CARBON DIOXIDE/RH/TEMPERATURE TRANSMITTER
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.