Series-CDTR

CO2, RH & Temp Transmitters for Efficient Building Management Systems

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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

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Series-CDTR

From ^C$ 0.00

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Data Sheet

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Product Overview

Applications Building and Maintenance, HVAC
Carbon Dioxide Concentration, Max 2000 ppm
Carbon Dioxide Concentration, Min 0 ppm
Carbon Dioxide Response Time 120 s (τ90)
Compliance CE
Electrical Output 4 to 20 mA
Operating Temperature, Max 122 °F
Operating Temperature, Min 32 °F
Output Detail CO2 Output: 4-20 mA / 0 to (5 or 10) VDC; RH Output: 4-20 mA / 0 to (5 or 10) VDC
Output Signal Current, Voltage
Power Consumption Average: 2 W; Peak: 3.75 W
Relative Humidity 0 to 85% RH Non-Condensing
Relative Humidity Accuracy ± 2% RH
Relative Humidity Input Range 10 to 90% RH
Sensor Life 15 Years
Supply Power Type AC/DC
Supply Voltage 19 to 28 Vac/16 to 35 Vdc
Switch Type N/A
Voltage Output Range 0 to 5 Vdc, 0 to 10 Vdc

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.

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