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All Categories > Humidity Instruments > Order # HTM-D-420  
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Order # HTM-D-420, Economy 3% Duct Humidity Transmitter

Base Price $250.00 ( Quantity Discount Available )

  • Temperature compensated
  • 2-Wire, 4...20mA
  • Economical pricing
  • 3% accuracy
  • Measures 10 to 90% rH

  • Our temperature compensated humidity transmitter has been designed to meet the demands of energy management, environmental and process industries. The polymer based humidity sensor is one of the most stable sensors available. The 2 wire, 4-20 mA design provides ease of installation, lowering the cost of field wiring.
    The high accuracy over the wide range of 10-90% rH allows precise measurement of the humidity over the operating range of 0 to +60ºC. Even condensation on the sensor will not harm it.
    Each transmitter is calibrated in our computer operated atmospheric simulation chamber against our traceable Standard, a Condensation Dew Point Hygrometer.

    Technical Data


    3% duct humidity transmitter

    Operating Range

    10 - 98% rH

    Calibration Range

    0 - 100% rH


    +/- 3%

    Temperature Dependence

    0.2% rH per ºC

    Response Time

    1 minute from 90% to 10% rH


    4 to 20mA in 2-wire technology


    250/500 ohms +/-.1% at 12/24 VDC supply

    Power Supply

    24 VDC +/- 15%

    Operating Temperature - Probe

    0 to +60 ºC/-20 to +70 ºC for 0-100%rH, non-condensing


    +/- 2% rH in 24 months typical


    Do not expose to vapours such as acetone that attack plastic.

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