Model : 083E
The 083E Relative Humidity Sensor is a highly sensitive and stable temperature measurement
tool that provides outstanding accuracy. It is reliable in the full range of relative humidity conditions,
from 0-100% , performing equally well in meteorological, industrial, laboratory and other
demanding settings.
This model is also available with a mounted temperature sensor, and can be used with a variety
of radiation shields.

• All solid state construction, digital electronics
• Fast response of less than 5 seconds to 90%
of final value
• Low power consumption of 4 mA at 12 VDC
• Easily cleaned using distilled water
• 0-1V output for 0-100% RH
• Will operate from a 12 VDC battery
Operation
The 083E Relative Humidity Sensor measures
variance in the capacitance change of a onemicron
thick dielectric polymer layer.
This film absorbs water molecules through a metal
electrode, and causes capacitance change proportional
to relative humidity. The thin polymer layer
reacts very quickly, providing up to 90% of the final
value of relative humidity in fewer than five seconds.
The sensor’ s response is essentially linear, with small
hysteresis, and negligible temperature dependence

Construction
– The sensor is mounted on a small probe, which
measures, records and displays humidity levels
– Because the sensor measures only ambient
humidity, in most settings temperature
compensation is unnecessary
– The probe body is water tight and made from
corrosion resistant aluminum
– Immersion of the sensor element in water does
not adversely affect the calibration