Duct Humidity & Temperature Transmitters HDTT-series

Duct Humidity and temperature transmitters HDTT series

The duct humidity and temperature transmitter HDTT measures the relative humidity and temperature of air.

The duct humidity and temperature transmitter HDTT converts the measurands into standard signals of
0-10 Vdc or 4-20 mA and is optional available with or without display.

Display-versions show actual humidity and actual temperature.

Terminal box enclosure made of impact-resistant plastic with enclosure cover with quick-locking screws.

The duct humidity and temperature transmitter HDTT has four switchable temperature ranges and is applied in non-aggressive dust-free ambiences in refrigeration, air conditioning, ventilation and clean room technology.

Relative humidity (in % r. H.) is the quotient of water vapour partial pressure divided by the saturation vapour pressure at the respective gas temperature.

These measuring transducers are designed for exact detection of humidity.

A digital long-term stable sensor is used as measuring element for humidity measurement.

Fine adjustment by the user is possible.

Mounting flange is included in the scope of delivery for the the duct humidity and temperature transmitter HDTT.

  • Outputs

    • Humidity and temperature
    HDTT 010 with 2 x 0-10 Vdc outputs
    HDTT 420 with 2 x 4-20 mA outputs.

    As option passive (direct) temperature output such
    PT100, PT1000, Nickel, NTC 10K, NTC 1.8K,NTC 20K and PTC etc.

  • Humidity measuring range range

    • 0 to 100% r.H. (output corresponding to 0-10 Vdc or 4-20 mA)

  • Temperature measuring ranges

    • 4 different measuring temperature ranges selectable by jumpers on pcb -35°C to +35°C, -35°C to +75°C, 0 to 50°C or 0 to +80°C.

  • Accuracy

    • - Humidity +/- 3% (20 to 80% r.H.), at +20°C, otherwise+/- 5%
    - Temperature +/- 0.8 Kelvin at +20°C.

  • Long-term stability
  • Small hysteresis
  • Easy to fix penetration dept with mounting flange
  • With or without LCD display

Download datasheet

Duct Humidity & Temperature Transmitters HDTT-series.pdf

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