Sensor Specifications
| Wind Speed | |
| Selections: | mph | kt | B | m/s | ft/min / km/h | 
| Specification Range: | 
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| Operational Range: | 
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| Resolution: | 
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| Accuracy (+/-): | Larger of 3% of reading, least significant digit or 20 ft/min | 
| Notes: | 1 inch|25 mm diameter impeller with precision axle and low-friction Zytel® bearings. Startup speed stated as lower limit, readings may be taken down to 0.4 m/s | 79 ft/min | 1.5 km/h | .9 mph | .8 kt after impeller startup. Off-axis accuracy -1% @ 5º off-axis; -2% @ 10º; -3% @ 15º. Calibration drift < 1% after 100 hours use at 16 MPH | 7 m/s. Replacement impeller (PN-0801) field installs without tools (US Patent 5,783,753). Wind speed calibration and testing should be done with triangle on impeller located at the top front face of the Kestrel. *F/S only in Ballistics units. Beaufort not available in Ballistics units. | 
| Ambient Temperature | |
| Selections: | Fahrenheit, Celsius | 
| Specification Range: | 
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| Operational Range: | 
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| Resolution: | 
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| Accuracy (+/-): | 
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| Notes: | Hermetically sealed, precision thermistor mounted externally and thermally isolated (US Patent 5,939,645) for rapid response. Airflow of 2.2 mph|1 m/s or greater provides fastest response and reduction of insolation effect. Calibration drift negligible. Thermistor may also be used to measure temperature of water or snow by submerging thermistor portion into material -- remove impeller prior to taking submerged measurements and ensure humidity sensor membrane is free of liquid water prior to taking humidity-based measurements after submersion. | 
Calculated Measurements:
| Wind Chill | |
| Accuracy (+/-): | 
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| Resolution: | 
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| Sensors employed: | 
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