Ambient Weather WM-4 Handheld Weather Station w/ Windspeed, Direction, Temperature, Humidity, Compass, Dew Point, Comfort Index, Psychrometer
Features:Current wind speed, Maximum wind speed, Average wind speedWind measurement units: knots, mph, kph, feet/minute, meters/second, BeaufortWind direction in degrees and compass pointsCalculates cross wind, head/tail windCurrent 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 TAccuWeather.com® patented Comfort Index™USA fluxgate compassSwiss-made impellerLifetime calibrated Swiss-made humidity sensorBacklit LCD displayAuto shutoff after 5-minThreaded for tripod mountingPocket-knife design to protect unit when not in useAdjustable lanyardWater resistant and floatsSpecifications:Wind speed range: .8-89 mphWind speed accuracy: ±3% when aligned with winds axisCurrent wind response time: 1-secAvg wind response time: over 10 secMax wind response time: 1-secCross wind head/tail wind response time: 5 secWind direction response time: 1 secTemperature range: -20° to +158°FTemperature accuracy: ±1.8°FTemperature response time: 1 minDew point range: -20° to +158°FDew point accuracy: ±3.6°FDew point response time: 1 minWet bulb accuracy: ±3.6°FWet bulb range: 32° to 100°FWet bulb response time: 1-minWind chill range: -50° to +50°FWind chill accuracy: ±1.8°FWind chill response time: 1 secRel. humidity range: 5-95%Rel. humidity accuracy: ±3%Rel. humidity response time: 1 minDelta T response time: 1-minCompass accuracy: ±2°Compass range: 0 to 360Compass response time: 1 secOther Specifications:Power: CR2032 Lithium battery (included and replaceable)Dimensions: 5.5" x 1.75" x .75"