Measure multiple environmental parameters with a single self-contained pen-style anemometer. Ideal for field studies and HVAC à¤Ã×èͧÇÑ´¤ÇÒÁàÃçÇÅÁ ÍسËÀÙÁÔ ¤ÇÒÁª×é¹ Sper Scientific 850021 • Air Speed • Temperature • RH • Dew Point Measure multiple environmental parameters with a single self-contained pen-style anemometer. Ideal for field studies and HVAC. Measures wind speed in four units of measure, temperature in ºC & ºF, humidity, and dew point. This anemometer will display two parameters simultaneously and indicate when batteries are low. Also features hold, min/max and auto power off. The RH Anemometer Pen comes ready to use with four AAA batteries and a soft carrying case with belt loop. Weight: 182g with batteries Dimension: 205 x 48mm Specifications: Specifications Range Resolution Accuracy Airspeed ft/min: 80 ~ 5910 1 Airspeed m/s: 0.4 ~ 30 0.1 <20 m="" s="" 3="" fs="" br="">>20 m/s ± 4% fs Airspeed km/h: 1.4 ~ 108 Airspeed mph: 0.9 ~ 67 Airspeed knots: 0.8 ~ 58 Temperature ºC: 0 ~ 50º Temperature ºF: 32 ~ 122º Relative Humidity: 10 ~ 95% >70% RH ± (3% rdg. + 1% RH) <70% RH ± 3% RH Dew Point ºC: -26 ~ 48º 0.01 Sum of the Temp + RH accuracy of the measurement Dew Point ºF: -14 ~ 120º 850021 Anemometer Flow Meter SPER Scientific à¤Ã×èͧÇÑ´¤ÇÒÁàÃçÇÅÁ