Heated Humidity Sensor for Radiosondes
HMC03M
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).
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