The H8000 capacitive polymer element is the latest generation technology, developed to reliably and accurately measure moisture in a wide range of relative humidity applications.
This element is the core measurement element of Michell’s new range of interchangeable HygroSmart sensors, probes and transmitters.

Product Features

  • Linearity ±1.5% RH
  • Stability ±1% RH per year
  • Operating temperature –40 to +200°C (–40 to +392°F)
  • Low thermal hysteresis
  • ø0.4mm (ø0.02”) leg diameter
  • Nominal capacitance 250 pF
  • Low RH hysteresis


Technical Specification

Performance Specifications
RH measurement range 0 to 100% RH
RH accuracy @ 23°C ±1.5% RH (5 to 95% RH)
RH hysteresis ±1% RH
RH measurement response time Less than 10 seconds
RH thermal drift (0 to +70°C (+32 to +158°F) / 10 kHz) @ 11%: –0.18% RH/°C
@ 75%: –0.24% RH/°C
Maximum mixing ratio 250g water/kg dry air
D factor (tangent of loss angle) 0.02 typical
RH long term stability @ 23°C (+73°F) < ±1% RH per year
Electrical Specifications
Nominal capacitance (75% RH @ 23°C (+73°F)) 250 pF ±15%
Nominal sensitivity (15 to 85% RH @ 23°C (+73°F)) 0.45 pF / %RH
Operating frequency range 5 / 300 kHz
Operating Specifications
Operating temperature –40 to +200°C (–40 to 392°F)
Operating pressure 0.04 to 30 bar
Mechanical Specifications
Weight 0.1g (without cap)
Leg diameter ø0.4mm
Leg length 12mm (1.3”), 50mm (5.3”)

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