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Overview
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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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.
Specifications
| 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 |
Compatibility
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Dataloggers
| Product | Compatible | Note |
|---|---|---|
| 21X (retired) | ||
| CR10 (retired) | ||
| CR1000 (retired) | ||
| CR1000X | ||
| CR10X (retired) | ||
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR23X (retired) | ||
| CR300 | ||
| CR3000 (retired) | ||
| CR310 | ||
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) | ||
| CR9000 (retired) | ||
| CR9000X (retired) |
Additional Compatibility Information
Mounting
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]).