Testo 405-V1 Thermal Anemometer with Duct Holder Air/Wind Flow Volume Speed Temperature Meter Tester Testo 405-V1 Thermal Anemometer with Duct Holder Air/Wind Flow Volume Speed Temperature Meter Tester Specifications Temperature - NTC Measuring range -20 to +50 C Accuracy +/-0.5 C Resolution 0.1 C Velocity -Thermal anemometer Measuring range 0 to 5 m/s (-20 to 0 C) 0 to 10 m/s (0 to +50 C) 0 to 99990 m/h 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 General technical data Dimensions 490 x 37 x 36 mm Operating temperature 0 to +50 C Battery type 3 AAA micro batteries Battery life Approx. 20 h Display type LCD Length probe shaft 300 mm Diameter probe shaft 16 mm Diameter probe shaft tip 12 mm Storage temperature -20 to +70 C Weight 115 g (with batteries, without packaging) Product advantages: Measuring the amount of wind up to 99,990 m3 / h Rotating display, easy to read 300mm telescopic measuring rod Suitable for detecting the ventilation ducts Product Description testo 405 is a thermal anemometer. It can measure wind speed, wind and temperature. testo 405 is suitable for detection of ventilation ducts, vents or sealed windows. Technical parameters Storage temperature: -20 ... +70 C Operating temperature: 0 ... +50 C Battery Type: Section 3 AAA micro batteries (not included package, are unable to pass) Battery life: about 20 hours Dimensions: 490 x 37 x 36 mm NTC Technical parameters Measuring range: -20 ... +50 C Accuracy class: +/- 0.5 C