Thermo-Anemometer 8918 8918 Benefits: · SMALL, COMPACT DESIGN! · DISPLAY AIR VELOCITY AND TEMPERATURE OR TEMPERATURE AND WINDCHILL ! · WIND SPEED UNITS SELECTABLE! · WATER-RESISTANT AND SHOCK PROOF ! · TRIPOD MOUNTABLE ! · MEASURE RELATIVE HUMIDITY AND DEW POINT FEATURE Pocket-knife design makes it convenient and portable. Precision measurement and easy to use. Temp / windchill: Average updates every second. Windspeed: Moving 2-sec average with Maximum 2-second gust. Measurement units: knots, mph, kph, ft / min, m/ sec, beaufort. Sealed precision thermistor. Water resistant and shock proof housing. Detented at 180° for fully opened. Detented at 90° for tripod mountable. Safety wrist strap included. Replaceable lithium battery. Replaceable impeller (33(Dia.) x 16(T) mm). SPECIFICATION Unit Range Resolution m/s meter per second 1.1~20.0 0.1 Ft /Min Feet per minute 60~3937 0.1/1 KNT Knot 0.4~38.8 0.1 KMH Kilometer per hour 0.8~72.0 0.1 MPH Mile per hour 0.5~44.7 0.1 BF Beaufort 1~8 1 Min/Max Windsepeed : 0.5 ~ 44.7 MPH 60 ~ 3937 FT/M Relative Humidity range : 0 ~100% One button Data Hold Records maximum readings. °C/°F unit switchable. Auto power off : Approx. 20 min. Operating temperature : -15 ~ 50 °C average readings : 5 / 10 / 13 second averages Dimension : 235 x 45 x 25 mm for 180° full opened. 140 x 45 x 25 mm for folded. Meter supplied with battery ( CR2032 ), wrist strap, and manual. 8918 Air Velocity Meter Thermo-Anemometer »ÃÔÁÒ³ÅÁ CFM/CMM à¤Ã×èͧÇÑ´¤ÇÒÁàÃçÇÅÁ à¤Ã×èͧÇÑ´»ÃÔÁÒµÃÅÁ