à¤Ã×èͧÇÑ´¤ÇÒÁàÃçÇÅÁ AN340 Extech AN340 Mini-Vane Anemometer & Psychrometer The AN340 Mini-Vane Anemometer & Psychrometer from Extech features a 0.7" (18mm) mini-vane probe which can measure air velocity and air volume, temperature, humidity, wet bulb, and dew point. Perfect for taking measurements in ductwork or anywhere that access is an obstacle. The AN340 can datalog up to 12,000 readings at an interval from 1s to 5 hours. Then use the included USB cable and PC software to interpret and analyze the data. Vane telescopes from 1ft (0.3m) up to 3.3ft (1m) Measures air velocity, air volume, and air temperature Measures relative humidity (RH), dew point, and wet bulb Store and recall up to 99 readings Datalog up to 12,000 readings Min/Max/Avg, Data Hold Auto power off with disable function Built-in PC Interface Specifications: Specifications Range Basic Accuracy m/s 0.5 to 20m/s ±3% ft/min 100 to 3940ft/min ±3% Temperature -4 to 140°F (-20 to 60°C) ±1.1°F (0.6°C) Humidity 0.1 to 99.9%RH ±3%RH Wet Bulb -4 to 140°F (-20 to 60°C) Dew Point -4 to 140°F (-20 to 60°C) CFM/CMM 0 to 99999 Dimensions 6.7x3x1.7” (169x78.3x44.4mm) Weight 7.4oz (210g) Includes: AN340 Mini-Vane Anemometer with external mini vane probe, Windows compatible software, USB cable, 6 AAA batteries, and hard carrying case AN340 Anemometer Extech à¤Ã×èͧÇÑ´¤ÇÒÁàÃçÇÅÁ à¤Ã×èͧÇÑ´»ÃÔÁÒµÃÅÁ à¤Ã×èͧÇÑ´ÍѵÃÒ¤ÇÒÁàÃçÇÅÁ