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Humidity & Temp transmitters are designed for environmental monitoring and controlling in industrial, commercial and other buildings.
Item Number: HG803-2W4P-02
Power supply: DC 10-30V
Temperature range: -40℃~+120℃, default: -40℃~+80℃
Humidity range: 0%RH-100%RH
External probe accuracy: ±2%RH, ±0.4℃(25℃)
Built-in probe accuracy: ±3%RH, ±0.5℃(25℃)
Resolution: 0.1℃, 0.1%RH
Long-term stability: humidity ≤1%RH/y, temperature ≤0.1℃/y
Response time: humidity ≤4s (1m/s wind speed), temperature ≤15s (1m/s wind speed)
Output signal: RS485 (Modbus protocol)/4-20ma/0-5v/0-10v
Installation method: wall-mounted
| Technical Data | Description |
|---|---|
| DC power supply | 10 ~ 30V DC (12V recommended) |
| Maximum power consumption | About 1.2W |
| Current output | About 1.2W |
| Voltage output | About 1.2W |
| Typical accuracy (Temperature) | ±0.3℃ (25℃) / ±0.54℉ (77℉) |
| Typical accuracy (Humidity) | ±3%RH (60%RH, 25℃) |
| Measuring medium | Air |
| Measuring range (Temperature) | -40℃ ~ 80℃ / -40℉ ~ 176℉ (default) |
| Measuring range (Humidity) | 0%RH – 100%RH |
| Long-term stability (Temperature) | ≤ 0.1℃ /y |
| Long-term stability (Humidity) | ≤ 1%RH /y |
| Response time (Humidity) | ≤ 8s (1m/s Wind speed) |
| Response time (Temperature) | ≤ 15s (1m/s Wind speed) |
| Analog output | Signal Current 4 – 20 mA |
| Digital output | RS485 Communication (Modbus) protocol |
| Data bit length | 8 bits |
| Parity check mode | None |
| Stop bit length | 1 bit |
| Default Modbus communication address | 1 |
| Function code | 03 |
| Baud rate | 1200, 2400, 4800, 9600, 19200, 115200 (optional, default 9600 bps) |
| Load capacity (Current output) | ≤ 600Ω |
| Load capacity (Voltage output) | ≤ 250Ω |
| Transmitter circuit operating temperature | -20℃ ~ +60℃, 0%RH ~ 95%RH (non-condensation) |
| Line Color | Definition | Specification |
|---|---|---|
| Power Cord | ||
| Red | Power supply positive | 10 ~ 30V DC |
| Black | Power supply negative | GND |
| Analog Output Lines | ||
| Brown | Temperature signal positive | 4-20mA output |
| Blue | Temperature signal negative | Connects to Black (GND) |
| Grey | Humidity signal positive | 4-20mA output |
| White | Humidity signal negative | Connects to Black (GND) |
| RS485 Wiring | ||
| Yellow | RS485A | Twisted pair cable |
| Green | RS485B | Twisted pair cable |
Additional Notes:
Important:
These transmitters can be used for indoor air temperature and humidity monitoring in various industrial plant, clean room, lab, machine room, commercial buildings, airport, and schools.
The modbus interface is documented and integrator friendly. They also have transducer outputs for connecting as analog inputs to all popular control systems.
Various models are available:
Duct Mount,
Wall Mount,Room Mount and 2 meter cable.BACnet MS/TP and
Modbus RTU protocols over RS485,with an ethernet port.
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HENGKO is a prominent supplier of temperature and humidity monitoring solutions for various industries, specializing in manufacturing advanced temperature and humidity transmitters and sensors.
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