Testo 405 testo 405 is a thermal anemometer with a telescopic handle (max. extension length: 300 mm). It facilitates the measurement of air flow, volume flow and temperature. testo 405 thermal anemometer incl.duct holder and batteries Volume flow calculation up to 99,990 m3/h Temperature measurement Ideal for measurements in ducts Easy-to-read readings thanks to swivel display Telescopic handle to 300 mm Sensor protected by rotatable protection cap, 300 mm long telescopic handle Storage temperature -20 to +70 °C Operating temperature 0 to +50 °C Battery type 3 batteries Type AAA Battery life Approx. 20 h Weight 115 g Dimensions 490 x 37 x 36 mm Probe type NTC Meas. range -20 to +50 °C Accuracy ±0.5 °C Resolution 0.1 °C Probe type Thermo Meas. Range 0 to 5 m/s (-20 to 0 °C) 0 to 10 m/s (0 to +50 °C) Accuracy ±(0.1 m/s + 5% of mv) (0 to +2 m/s) ±(0.3 m/s + 5% of mv) (remaining range) Resolution 0.01 m/s Anemometer Testo Testo 405 à¤Ã×èͧÇÑ´¤ÇÒÁàÃçÇÅÁ à¤Ã×èͧÇÑ´»ÃÔÁÒµÃÅÁ à¤Ã×èͧÇÑ´ÍѵÃÒ¡ÒÃäËÅ