Weather Meter AZ 8909

Weather Meter AZ 8909 Features : A simple, hand-held meter for monitoring Wind speed Windchill * relative humidity Dew point Heat index Barometric pressure and upcoming storms. Altitude( Model 8910) 0, -2h, -4h, -8h, -16h bar chart shows the development of air pressure over the last 16 hours, forecast future weather. Records maximum readings. Twin button for multi-functions. Alarm functions are built-in for storm warning feature. Sealed precision thermistor & humidity sensor. Water resistant and shock proof housing. Replaceable lithium battery and impeller. Pocket-knife design makes it convenient. Low battery indication. Spesification : Wind Speed Functions: Modes: Current Wind Speed, Maximum Wind Speed, and Average Wind Speed. Scales Beaufort, Knots, MeterPerSecond, MilePerHour, FeetPerMinute, KilometerPerHour. Accuracy + / - 3% or + / - last significant digit. Range 1.1 to 20 M/ S ; 60 to 3937 FM ; or 0.5 to 44.7 MPH 0.4~ 38.8KNT ; 1~ 8BFT ; 0.8~ 72KMH Response Time 1 second Temperature Functions: Modes: Temperature Scales ? or ? Accuracy + / - 1 ? Range -15~ 50? Response Time 1 second Humidity Functions: Modes: Relative Humidity Scales RH% Accuracy + / - 3% Range 0% to 100% RH Response Time 15 second in slowly moving air at 25? Operating Temperature -40? to 85? Atmospheric Pressure Functions: Modes: Atmospheric Pressure Scales hPa ( millibar ) , or inches of mercury ( inHg ) Accuracy + / - 3hPa( at-10~ 60? ) Range 400 to 1100 hPa ( 11.8 to 32.5 inHg) Response Time 15 minutes Operating Temperature -20? to 65? History 16 Hours recall trends