HD48 Series – Active Temperature-Humidty Transmitters

Brand: Delta OHM S.R.L.

HD48 Series – Active Temperature-Humidty Transmitters

Brand: Delta OHM S.R.L.
HD48 transmitters are designed for temperature and humidity control in conditioning and ventilation applications (HVAC/BEMS).

The models of the HD48 series are active transmitters and accept both direct and 24Vac alternating power supply; they have standard current (4…20mA) or voltage (0…10V) outputs, or a serial RS485 output*, depending on the model.

Available models:
  • horizontal probe for duct mounting (TO),
  • vertical probe for wall mounting (TV),
  • probe with 2 or 5 m cable (TC),
  • fixed contact Pt100 probe for solar panel (TFP)

Specifications

Relative Humidity Sensor

  • Capacitive

Relative Humidity Measuring Range

  • 0 to 100 %RH

Relative Humidity Accuracy at T=15…35° C

  • ± 1.5 %RH (0…90 %RH)
  • ± 2.0 %RH (90…100 %RH)

Relative Humidity Accuracy at Rest of T Range

  • ± (1.5+1.5 % of the measure) %RH

Relative Humidity Repeatability

  • 0.4 %RH

Temperature Measuring & Working Range

  • Standard: -20° C to 80° C
  • Extended: -40° C to 150° C

Temperature Sensor

  • Standard: NTC 10kΩ
  • Extended: Pt100 class A

Temperature Accuracy

  • Standard: ± 0.3° C (0° C to 70° C)
  • Standard: ± 0.4° C (-20° C to 0° C, +70° C to 80° C)
  • Extended: ± 0.3° C

Temperature Repeatability

  • Standard: 0.05° C
  • Extended: 0.05° C

Dew Point Sensor

  • Parameter calculated from relative humidity and temperature

Dew Point Measuring Range

  • -20° C to 80° C DP

Dew Point Repeatability

  • 0.5° C DP

Power Supply

  • 18…40 Vdc or 24 Vac ± 10 %
  • 12…30 Vdc for Modbus output

Consumption

  • 4 mA @ 24 V(models with voltage output)
  • 4 mA @ 24 V with open output
  • 20 mA @ 24 V with 12 mA output (models with current output)
  • 2 mA @ 24 V models with serial RS-485 output

Electrical Connections

  • Screw type terminal block, max. 1,5 mm
  • M16 cable gland for input cable

Electronics Protection Class

  • IP66

Materials

  • ABS
  • Polycarbonate

Documentation

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