FYI:#1-Ambient Weather WM-4 Handheld Weather Station w/ Windspeed, Direction, Temperature, Humidity, Compass, Dew Point, Comfort Index, Psychrometer

FYI:#1-Ambient Weather WM-4 Handheld Weather Station w/ Windspeed, Direction, Temperature, Humidity, Compass, Dew Point, Comfort Index, Psychrometer

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The Ambient Weather WM-4 is a comprehensive handheld weather station, directional compass, heat index monitor and psychrometer, all in one compact, portable, rugged package. The WM-4 measures wind speed, wind direction, temperature, relative humidity and compass direction, and calculates wind gust, dew point, wet bulb and dry bulb temperature, Delta T, wind chill and heat index. It has a USA-made fluxgate compass for precise digital wind direction measurement, and it can also be used to calculate crosswind & head/tail wind readings with the built in wind vane. The jack knife case design protects the unit, and allows you to hold the case while taking precise temperature measurements, avoiding false readings from your hand temperature. @FYI:#1-Ambient Weather WM-4 Handheld Weather Station w/ Windspeed, Direction, Temperature, Humidity, Compass, Dew Point, Comfort Index, Psychrometer lontong : Ambient Weather : Current wind speed, Maximum wind speed, Average wind speed Wind measurement units: knots, mph, kph, feet/minute, meters/second, Beaufort Wind direction in degrees and compass points Calculates cross wind, head/tail wind Current temperature (F or C) Current dew point (F or C) Current wet bulb (F or C) Current wind chill (F or C) Current relative humidity (%RH) Current Delta T AccuWeather.com patented Comfort Index USA fluxgate compass Swiss-made impeller Lifetime calibrated Swiss-made humidity sensor Backlit LCD display Auto shutoff after 5-min Threaded for tripod mounting Pocket-knife design to protect unit when not in use Adjustable lanyard Water resistant and floats Specifications: Wind speed range: .8-89 mph Wind speed accuracy: 3% when aligned with winds axis Current wind response time: 1-sec Avg wind response time: over 10 sec Max wind response time: 1-sec Cross wind head/tail wind response time: 5 sec Wind direction response time: 1 sec Temperature range: -20 to +158F Temperature accuracy: 1.8F Temperature response time: 1 min Dew point range: -20 to +158F Dew point accuracy: 3.6F Dew point response time: 1 min Wet bulb accuracy: 3.6F Wet bulb range: 32 to 100F Wet bulb response time: 1-min Wind chill range: -50 to +50F Wind chill accuracy: 1.8F Wind chill response time: 1 sec Rel. humidity range: 5-95% Rel. humidity accuracy: 3% Rel. humidity response time: 1 min Delta T response time: 1-min Compass accuracy: 2 Compass range: 0 to 360 Compass response time: 1 sec Other Specifications: Power: CR2032 Lithium battery (included and replaceable) Dimensions: 5.5" x 1.75" x .75"