Product Description

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
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 +158°F
Temperature accuracy: ±1.8°F
Temperature response time: 1 min
Dew point range: -20° to +158°F
Dew point accuracy: ±3.6°F
Dew point response time: 1 min
Wet bulb accuracy: ±3.6°F
Wet bulb range: 32° to 100°F
Wet bulb response time: 1-min
Wind chill range: -50° to +50°F
Wind chill accuracy: ±1.8°F
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"

Feature

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.
Brand : Ambient Weather
Item model num : WM-4
MPN(PartNumber) : WM-4
EAN : 0857450002890
Product Dimensions(LxWxH) : 16x13x35cm ; 181 g
Package Dimensions(LxWxH) : 20x17x2cm ; 181 g

Attention for order international goodsAll items are delivered from oversea(USA,KOREA,JAPAN,Malaysia)DirectlyDelivery would be done local shipping company in country of Production Place and Qxpress or POST in singaporeTotal shipping takes 7~14 working daysThe item from the third country could take 2 week more than normal delivery in transitNo exchange or Return is Allowed because of simple mind change Such Return or exchange is ly allowed for the reason below Major defect is discovered Wrong item is Delivered If you want to retunr or exchage at you cost, kindly Contact us via email Please check when you return the item just for changing your mind, you could be charge return cost (orginal + return shipping , duty, and etc) You should let us know within 7 days from the date you received the item if you'd like to get a refund for the item About Votage of electronics The voltage of most electronics goods listed on our shop is 110V Need transfomer to use US electronics We cannot accept return for dameged electronic item because of not using transfomer