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083E-L Temperature and Relative Humidity Sensor
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The 083E, manufactured by Met One, is a temperature and relative humidity sensor that is commonly used with the WMS100 for wind-farm power performance measurements. The sensor is made of corrosion-resistant aluminum and polymer, and it is water-tight. It measures the full range of relative humidity, from 0 to 100%.

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083E sensor with the 41003-5 shield and crossarm (sold separately)
083E sensor with the 41003-5 shield and crossarm (sold separately)
083E sensor with the 41003-5 shield and crossarm (sold separately)
083E sensor with the 41003-5 shield and mast (sold separately)

Detailed Description

The 083E Relative Humidity Sensor measures variance in the capacitance change of a one micron thick dielectric polymer layer. This film absorbs water molecules through a metal electrode, and causes a capacitance change that is proportional to relative humidity. The thin polymer layer reacts 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.

Temperature is measured with an internal thermistor.


Measurement Description Temperature, relative humidity
Signal Type/Output Analog voltage
Input Power 4 mA at 12 Vdc (10 to 14 Vdc)
Diameter 1.91 cm (0.75 in.)
Length 19.05 cm (7.5 in.)
Weight 70.9 g (2.5 oz)

Relative Humidity

Sensor Thin film polymer capacitor
Measurement Range 0 to 100% RH
Response Time 10 s (with 2 m s-1 aspiration)
Temperature Coefficient 0.04% RH per °C
Accuracy ±2.0% from 0 to 100% humidity
Output Signal Range 0 to 1 Vdc

Air Temperature

Sensor Thermistor (precision multi-element)
Operating Temperature Range -50° to +50°C
Accuracy ±0.10°C (0.18°F)
Output Resistive


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.


Product Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR1000 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR3000 (retired)
CR3000 (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR9000 (retired)
CR9000X (retired)

Additional Compatibility Information


When exposed to sunlight, the 083E must be housed in a 41003-5 or RAD14 naturally aspirated radiation shield. The 41003-5 and RAD14 attach to a crossarm, mast, or user-supplied pipe with a 2.5 to 5.3 cm (1.0 to 2.1 in.) outer diameter.

The RAD14 uses a double-louvered design that offers improved sensor protection from driving rain, snow, and insect intrusion. A better measurement can be made by providing lower self-heating in bright sunlight combined with higher temperatures (> 24°C [~75°F]) and low wind speeds (< 2 m s-1 [~4.5 mph]).