Kestrel Meter vs. Sling Psychrometer

Is your sling psychrometer reading different from your Kestrel?  It's not uncommon.   Typically, you might see that the sling gives a reading 5-10% higher than the Kestrel Meter. There are some real common errors seen with Slings. The Humidity on a Sling will err on the high side if: The sock on the wet bulb or the water used for the wet bulb thermometer is not clean. The sling is not swung around long enough. The thermometer measurements are not read quickly enough after swinging the sling. These are all of the common errors with a sling psychrometer causing...

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Kestrel DROP Specs

Kestrel DROP Specifications SENSOR ACCURACY RESOLUTION RANGE AMBIENT TEMPERATURE +/- 0.9°F / 0.5°C 0.1°F / 0.1°C 14 to 131°F / -10°C to 55°C RELATIVE HUMIDITY +/- 2% RH 0.1% RH 10% to 90% RH, 25°C non-condensing PRESSURE +/ 1.5 hPa|mbar0.044 inHg0.022 PSI 0.1 hPa|mbar0.01 inHg0.01 PSI 25°C/77°F700-1100 hPa|mbar20.67-32.48 inHg10.15-15.95 PSI MEASUREMENT ACCURACY RESOLUTION SENSORS EMPLOYED DEW POINT +/- 3.4°F / 1.9°C15-95% RH. Refer to range for temp. sensor 0.1°F / 0.1°C Temperature, Relative Humidity HEAT INDEX +/- 7.1°F / 4°C 0.1°F / 0.1°C Temperature, Relative Humidity DENSITY ALTITUDE +/- 69.0 m+/- 226.0 ft 1 ft1 m Temperature, Relative Humidity, Pressure...

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Battery level drops on Kestrel

The reason behind our battery life indicator dropping in cold, hot, or suddenly is because Lithium batteries don't lose their capacity in a linear fashion so it is difficult to precisely determine how much battery life is left based on the voltage of the battery. Essentially the battery keeps a very high voltage until the very end and then it drops off rapidly. If you take a look at this chart below, you can see that the line goes pretty much straight across until it drops suddenly. So the Kestrel may not show a drop in % until close to...

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