Heated Humidity Sensing Element for Radiosondes and Weather Balloons

  • Humidity

HMC03M

HMC03M is optimised 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).

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.

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  • Very short response time even at low temperature
  • Fast recovery after condensation or icing due to sensor heating
  • High sensitivity and outstanding linearity
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
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Matthew Nemeth | Managing Director E+E Elektronik Corporation USA
Matthew Nemeth | Managing Director E+E Elektronik Corporation USA
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