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Home > Featured Products > Weather > Dew Point Monitors > Ambient Weather WM-4 Handheld Weather Meter w/ Windspeed, Direction, Temperature, Humidity, Compass, Dew Point, Comfort Index, Psychrometer

Ambient Weather WM-4 Handheld Weather Station w/ Windspeed, Direction, Temperature, Humidity, Compass, Dew Point, Heat Index and more

Ambient Weather WM-4 Handheld Weather Meter w/ Windspeed, Direction, Temperature, Humidity, Compass, Dew Point, Comfort Index, Psychrometer

Item #: WM-4

The Ambient Weather WM-4 is a comprehensive handheld wind meter, directional compass, comfort index monitor and psychrometer, all in one compact, porta... [Read More]

Our Price: $119.99

The Ambient Weather WM-4 is a comprehensive handheld wind meter, directional compass, comfort 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 comfort 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.

Unlike traditional compasses which require leveling, the WM-4 reads when held vertically and can be used to take a bearing on a distant landmark or reference location.

The jack knife case design protects the unit, and allows you to hold the case while taking precise temperature meaurements, avoiding false readings from your hand temperature.

The WM-4 can be tripod-mounted and accessories include a wind tunnel for very accurate directional measurements, replacement impeller, soft belt carrying case, and humidity calibration kits to insure the humidity is within specified range.

Includes a 2 year factory warranty from Ambient Weather.

Features
	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

	Exclusive AccuWeather.com® patented Comfort Index™

	USA fluxgate compass

	Use as a bearing compass

	Replaceable 400 hour lithium battery

	Swiss-made impeller components

	Lifetime calibrated Swiss-made humidity sensor

	Easy to read backlit LCD display

	Auto shutoff after five (5) minutes

	Threaded for tripod mounting

	Unique pocket-knife design to protect unit when not in use

	Comes with adjustable lanyard

	Water resistant and floats

	Two (2) year warranty

	Specifications:

	Wind speed range: .8-89 mph

	Wind speed accuracy: ±3% when aligned with winds axis

	Current wind response time: 1-second

	Average wind response time: over 10 seconds

	Maximum wind response time: 1-second

	Cross wind head/tail wind response time: 5 seconds

	Wind direction response time: 1 second

	Temperature range: -20° to +158°F

	Temperature accuracy: ±1.8°F

	Temperature response time: 1 minute

	Dew point range: -20° to +158°F

	Dew point accuracy: ±3.6°F

	Dew point response time: 1 minute

	Wet bulb accuracy: ±3.6°F

	Wet bulb range: 32° to 100°F

	Wet bulb response time: 1-minute

	Wind chill range: -50° to +50°F

	Wind chill accuracy: ±1.8°F

	Wind chill response time: 1 second

	Relative humidity range: 5-95%

	Relative humidity accuracy: ±3%

	Relative humidity response time: 1 minute

	Delta T response time: 1-minute

	Compass accuracy: ±2°

	Compass range: 0 to 360

	Compass response time: 1 second

	Other:

	Power requirement: CR2032 Lithium battery (included)

	Dimensions: Unit (closed): 5.5" x 1.75" x .75"

	User Manual included (English)

	Manual available online...

Applications:

Outdoor:
Backpacking & hiking, biathlon, camping, climbing & mountaineering, conditions monitoring by, athletic trainers, dog sledding, figure skating, fishing & hunting, geocaching, golfing & caddying, hang gliding, kite boarding, kite surfing, model airplanes, paddle sports, sailing & yachting, scuba diving, skeleton & luge, ski patrol, sky diving, snow making, snow sports, wind surfing.

Military:
Combat weather, critical response teams, drop & landing zone safety, expeditionary flight operations, hvac & space conditions, monitoring, k9 operations, medic support, mine removal, nbc & hazmat response, sniper training & operations, thermal imaging systems (flir), unmanned aerial vehicles.

Forestry & Firefighting:
Environmental conservation, fire & rescue training, hazardous materials response, ladder trucks, prescribed burning, smoke coordinators, smoke jumping, structural firefighting, wildland firefighting.

Weather:
Amateur weather watching, meteorology, noaa weather data collection, storm chasing, skywarn spotters, tv weather reporting, wind power generation.

Construction & Industrial:
Air quality monitoring, asphalt placement, brick drying systems, building science, civil engineering construction, concrete installation, construction site monitoring, crane operations, demolition work, electrical line work, exterior painting , facilities monitoring, furnace industry, "heating, ventilation, air conditioning", home inspections, indoor air surveys, infrared roof inspection, micro climate surveys, mine operations, mold samplings, odor control surveys, spray applications, steel bridge coating & lining, water damage restoration, welding inspection.

Rescue Services:
Avalanche patrol, border patrol, coroner reports & studies, dive rescue specialists, emergency management, emt & first responders, forensics, hazmat/biohazard, k9 handlers, mountain rescue, search & rescue

Motor Sports:
Drag racing, engine tuning, go-carting, jetting, motocross, open wheel racing, snowmobiling, stock car racing, track monitoring.

Shooting Sports:
Archery, and bench rest shooting, firearm ballistics, long range rifle competition, swat, safari guides, sniper training & operations, target shooting.

Scientific & Education:
Academic research, animal behavior research, arboriculture, astronomy, biological research, bird watching, botany observation, boy scouts, cave research, child care, classroom use, ecology & geology, environmental conservation, horticulture, infrared thermography, lab safety, marine & ocean research, mine surveys, scientific expeditions, survey, windmill & wind power generation.

Agricultural:
Animal husbandry, arboriculture, barn ventilation & rh monitoring, crop harvesting, golf course management, grain handling, herbicide & pesticide application, irrigation audits, landscaping, livestock comfort, poultry farming, spray drift monitoring, spraying, vineyard management.

Aviation:
Air plane engine tuning, crop dusting, drop zone monitoring, glider flying, hot air ballooning, parachuting, paragliding & sailing, powered parachute training, small airport weather reporting, space shuttle operations, ultralight flying.