Airflow measuring instrument testo 425

Airflow measuring instrument testo 425 measuring range 0 - 20 m/s Anemometer with permanently connected thermal flow sensor (cable length approx. 1.2 m) incl. telescope tube (telescope length max. 820 mm). Volume flow calculation by entering the channel area. Measurement of temperature, flow and volume flow Determination of points and average value over time Max/Min value Hold key for holding the measured value. Display backlighting Auto-Off function. Technical data: Thermal NTC Measuring ranges 0 to +20 m/s -20 to +70 °C Accuracy ±0.03 m/s or 5 % v. mw. ±0.5 °C (0 to +60 °C) ±0.7 °C (outside) Resolution 0.01 m/s 0.1 °C Operating temperature -20 to +50 °C Dimensions (W x D x H) 64 x 40 x 182 mm Weight 285 g Delivery incl. airflow measuring instrument testo 425 with permanently connected flow sensor incl. telescope tube, E-block battery 9 V and calibration protocol.