Ambient Temperature & Humidity Sensor
Air temperature and relative humidity with passive or fan-aspirated radiation shield.
Overview
The temperature and humidity sensor measures relative humidity and air temperature, and comes with a passive solar radiation shield or a 24-hour fan-aspirated radiation shield.
The passive shield is made of a proprietary plastic designed for high thermal reflectance and low thermal conductivity. The 24-hour shield includes a solar- and battery-powered fan that pulls air up through the shield and over the sensors for the highest temperature accuracy.

Technical specifications
| Operating Temperature | -40° to +150°F (-40° to +65°C). |
|---|---|
| Storage Temperature | -40° to +158°F (-40° to +70°C). |
| Sensor Temperature | PN junction silicone diode. |
| Sensor Relative Humidity | Film capacitor element. |
| Cable Length | 25 feet (7.6 meters). |
| Dimensions 6380 | 1" high x 9.5" wide x 7.8" deep (206mm x 241mm x 198mm). |
| Dimensions 6382 | 8.1" high x 9.5" wide x 7.8" deep (206mm x 241mm x 198mm). |
| 6380 (Weight) | 3.5 lbs. (1.6 kg). |
| 63820 (Weight) | 6.6 lbs. (3.0 kg). |
| Dimensions (length x width x height) | 15.0" x 1.5" x 18.0" (381 mm x 38 mm x 457 mm). |
| Weight | 1 lbs. 4 oz. (1.332 kg). |
| Humidity Range | 1 to 100% RH. |
| Humidity Accuracy | ±2% |
| Humidity Drift | <0.25% per year. |
| Temperature (Air only) Range | -40° to +150°F (-40° to +65°C). |
| Temperature (Air only) Sensor Accuracy | ±0.5°F (±0.3°C) See Graph Below. |
| Solar-powered, full sun | 190 ft./min. (0.96 m/s). |
| Battery only | 80 feet/min (0.4 m/s). |
| Radiation Induced Temperature Error | +0.6°F (0.3°C) at solar no on (insolation=1040W/m2, avg.wind speed < 2 mph (1 m/s)) (reference: RM Young Model 43408 Fan-Aspirated Radiation Shield). |
| Battery Charge / Operating Temperature | 32° to +113°F (0° to +45°C). |
| Battery Discharge / Storage Temperature | 4° to +140°F (-20° to +60°C). |
| Fan Primary Power | Solar panel. |
| Fan Secondary Power | One or two 1.2v NiMHC-cells. |
| Certificate | CE certified. |
Note: Different Models are Available.
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