Active humidity transmitter for 4…20 mA, 0…10 V or RS485 outputs, HD48… serie
Humidity transmitter for HVAC and building monitoring, measuring relative humidity, temperature or dew point, with 4…20 mA, 0…10 Vdc or RS485 Modbus-RTU output and IP65 housing.
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Product description
Stable indoor climate data helps keep HVAC, BEMS and controlled environments running with confidence. HD48 transmitters measure relative humidity, temperature and calculated dew point, making them suitable for ventilation ducts, cleanrooms, museums, pharmacies, greenhouses, farms and industrial or civil buildings.
The series adapts to different installation points without changing the measurement concept. Choose vertical wall probes, horizontal duct probes or remote probes with 2, 5 or 10 m cable, plus 135 mm or 335 mm stem lengths where applicable. Standard versions cover -20...+80 °C, while selected horizontal and cable probe versions extend to -40...+150 °C.
Integration is straightforward in both analog and digital systems. HD48 versions offer active 4...20 mA, 0...10 Vdc or RS485 Modbus-RTU output, with optional 4-digit LCD display and factory calibration for immediate use. The IP65 ABS housing and protected probe filters support reliable operation with low routine maintenance.
Flexible installation
Wall, duct and remote probes cover common HVAC and BEMS mounting points.
Wide temperature use
Selected probe versions extend the range from -40...+150 °C.
Analog or Modbus
Choose 4...20 mA, 0...10 Vdc or RS485 Modbus-RTU outputs.
Ready to install
Factory calibration allows immediate use without on-site adjustment.
Features
- Measured quantities
Models are available for relative humidity, temperature, relative humidity with temperature, or dew point with temperature. - Probe configurations
The series includes fixed vertical wall probes, fixed horizontal duct probes and cable probes with M16 connector. - Sensor technology
Relative humidity is measured with a capacitive sensor, while temperature is measured with NTC or Pt100 depending on version. - Display option
Versions with 4-digit LCD display can show one measured parameter or alternate two parameters in sequence. - RS485 communication
HD48S models use Modbus-RTU and include configurable address, baud rate, parity and stop bit settings. - Configuration software
HD4817CAL software supports analog range scaling, serial communication settings, display mode, temperature unit and RH calibration.