Description
The WM-300 is a comprehensive instrument for agriculture, forestry, emergency management and other industry professionals. In addition to relative humidity, the unit measures dew point, wet bulb, Delta T, temperature & wind chill. 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. Unlike a traditional compass, the WM-300 reads when held vertically and can be used to take a bearing on a distant landmark or reference location. The WM-300 includes the Accuweather patented Comfort Index, which is the effect of temperature, wind speed, relative humidity and sun intensity on the human body for a superior human based reference to Heat Index. WM-300 can be tripod-mounted and accommodates the Model SM-WT wind tunnel accessory for very precise measurements. All WindMates are designed with a wind speed accuracy of better than +/- 3%.
| WM100 | WM200 | WM300 | WM350* | |
|---|---|---|---|---|
| Current & Max windspeed 1 Mph, km/h, kt, ft/min, m/s, BF | x | x | x | x |
| Average windspeed (secs) | 5,10,15 | 10 | 10 | 10 |
| Temperature & windchill 2 | x | x | x | |
| Time/Date/Alarm | x | |||
| Wind Vane | x | x | x | x |
| Digital compass 3 / wind direction | x | x | x | |
| Cross wind, head/tail wind | x | x | x | |
| Relative humidity 4 | x | x | ||
| Relative humidity, no calibration needed 4 | x | x | ||
| Wet Bulb, Dewpoint 5 | x | x | ||
| Dewpoint 5, Heat Index 9 | ||||
| Delta T | x | x | ||
| Accuweather.com® Comfort Index™ | x | x | ||
| Barometer 6 with 48-hr graph & hr-by-hr history | x | |||
| Barometer 6 with 16-hr graph | x | |||
| Altitude 7 | x | |||
| Density Altitude 8 | x | |||
| EL Light | x | x | x | |
| Auto Shutoff (after 5 mins) & Tripod Fitting | x | x | x | x |
| Disable Auto Shutoff | x | |||
| CR 2032 Lithium battery | x | x | x | x |
1 Windspeed accuracy +/− 3% from .8−89mph. Windspeed ranges are higher than specifications
2 Temperature/windchill accuracy +/− 1.8°F
3 Digital compass accuracy +/− 2°
4 RH accuracy +/− 3%
5 Wet Bulb, Dewpoint accuracy +/− 3.6°F
6 Barometer accuracy +/− .05 inHg
7 Altitude accuracy +/− 50 Ft
8 Density Altitude accuracy +/− 246 Ft
9 Heat Index accuracy +/− 4°F
* WM350 has 48hr graph & hour-by-hour history for all functions
