UPC 857450002890

• 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.

Features: 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 IndexTM USA fluxgate compass Swiss-made impeller