CDTHW : Carbon Dioxide (CO2) / Temperature / Humidity Transmitter

Model :CDTHW
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Description

Carbon Dioxide (CO2) / Temperature / Humidity Transmitter

Applications & Features:
  • CDTH series carbon dioxide ( CO2 ) / temperature /
    humidity transmitters are designed for monitoring &
    controlling indoor air quality, temperature, and humidity in
    one unit
  • CDTHW is suitable for wall mount and CDTHD is suitable
    for duct mount
  • High-performance NDIR digital sensor and circuit, ensure
    precise measurement and temperature compensation
  • Multiple optional RTD or thermistor sensors, compatible
    with a variety of control systems
  • Stable, reliable, and fast response
  • 15 years of CO2 sensor life without maintenance
  • All electrical terminals are on the inside bottom, avoid any
    possible destroy to PCB when wiring(CDTHW)
  • Digital technology applied, multiple outputs optional, over
    voltage and reverse polarity protection, high reliability
    and anti-interference capability
  • Large LCD with the unit indicator( CDTHW ), display carbon
    dioxide ( CO2 ), temperature and humidity alternatively

Accuracy table for temperature/ humidity :

Outputs T (@10~40°C) RH (25°C,20~80%RH)
0~10V DC <±0.5° C 3%RH
4~20mA <±1.0°C 5%RH
RS485/ Modbus <±0.5°C 3%RH
RTD/thermistor See models See models

Additional information

Carbon dioxide (CO2 )

—
Sensor

: NDIR sensor, with ABC algorithm*
Sampling Method

: diffusion
Accuracy

: (40+3%MV) ppm
Response time

: <10s (30cc/min, low airflow)
Drift

: <±10ppm/year
Range

: 0~2000ppm (measure range 400~2000ppm)
Output

: 4~20mA, 0~10V, RS485/Modbus
Temperature

—
T- Sensor

: Digital, RTD or thermistor, see models
T- Range

: 0~50°C
T- Accuracy

: see accuracy table
T- Output

: 4~20mA, 0~10V, RS485/Modbus or RTD / thermistor
Relative Humidity

—
RH - Sensor

: Digital polymer
RH - Range

: 0~100%RH
RH - Accuracy

: see accuracy table
RH - Hysteresis

: <±1%RH
RH - Response time

: <10s (25°C, in slow air)
RH - Drift

: <±0.5%RH/year
RH - Output

: 4~20mA, 0~10V, RS485/Modbus
RH - Power supply

: 16~28VAC/16-35VDC
RH - Load resistance

: ≤500Ω (Current output),≥2kΩ (Voltage output)
Display

— Optional LCD Display (CDTHW)
D - Display resolution

: 1ppm, 0.1°C, 0.1%RH
D - Working environment

: 0~50°C, 0~95%RH (Non-cond.)
D - Temp. compensation

: 0~50°C
D - Storage temperature

: -20~60°C

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