Heated Humidity Sensor for Radiosondes

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  • Humidity


HMC03M is optimized for short response time even at very low temperature in the upper atmosphere. It combines on a silicon substrate a capacitive relative humidity sensor and a heating resistor (heater).

  • HMC03M heated humidity sensor

  • Response time for HMC03M

    The heater is dedicated for fast recovery of the humidity sensor after condensation or icing. This leads to outstanding measuring performance in high-end weather observation.

    Key Features

    • Very short response time even at low temperature
    • Fast recovery after condensation or icing due to sensor heating
    • High sensitivity and outstanding linearity

    Technical data

    Nominal capacitance C0 (at 30 °C / 86 °F)
    120 ± 40 pF
    Sensitivity (for C0 = 120 pF, in average)
    0.41 pF / % RH
    Response time t63 (see Graph for details)
    < 8 sec. at -30 °C (-22 °F)
    < 11 sec. at -40 °C (-40 °F)
    Working range temperature
    -80...60 °C (-112...140 °F)

    Working range humidity
    0...100 % RH
    Linearity (0...98% RH)
    < ± 2 % RH

    Related products


    Downloads HMC03M

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