CDTHD – Indoor Air Quality Transmitter
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Description
Duct Mount (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 - 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 - Digital technology applied, multiple outputs optional, over-voltage and reverse polarity
protection, high reliability, and anti-interference capability - Light and state of art housing, easy installation
Additional information
| Carbon dioxide (CO2 ) | — |
|---|---|
| Sensor | : NDIR sensor, with ABC algorithm (Automatic Baseline Correction) |
| Sampling Method | : diffusion |
| Accuracy | see models |
| Response time | <10s (30cc/min, low airflow) |
| Drift | <±10ppm/year |
| Range | 0~2000ppm( measure range 400~2000ppm) |
| Output | 4~20mA, 0~10V, RS485/Modbus |
| T - Sensor | Digital, RTD or thermistor, see models |
| T- Range | 0~50 ° C |
| T- Accuracy | typical ±0.5 °C @ 15-30 °C, see models |
| T - Output | 4~20mA, 0~10V, RS485/Modbus or RTD/ thermister |
| Relative Humidity | — |
| RH - Sensor | : Digital polymer |
| RH - Range | : 0~100%RH |
| RH - Accuracy | 3%RH (25°C, 20~80%RH) |
| 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 | 15~28VAC/15-36VDC |
| RH - Load resistance | ≤500Ω (Current output), |
| Display | Optional LCD Display |
| D - Display resolution | : 1ppm, 0.1°C, 0.1%RH |
| D - Working environment | : 0~50°C, 0~95%RH (Non-cond.) |
