TESTO425 TESTO | Alldatasheet
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www.testo.com Data sheet Measurement of flow velocity, volume flow and temperature Point and timed mean value calculation Max./min. values Hold button for freezing measurement value Display illumination Auto-off function TopSafe, protection of the instrument from dirt and impact (optional) Thermal anemometer testo 425 – With fixed flow velocity probe m/s testo 425 is a compact anamometer with a fixed thermal flow velocity probe. The probe head has a diameter of 7.5 mm. With the extendable telescope (length max. 820 mm), the measuring instrument is suitable for flow velocity measurement in ducts. The testo 425 also measures extremely accurately in the low flow velocity range. The volume flow is directly shown in the display. For the purposes of volume flow calculation, the duct area can be easily entered into the testo 425. In addition to this, the instrument can be switched over to display the current temperature. Timed and point mean value calculation provide information on the average volume flow, flow velocity and temperature measurement value. The Hold function allows the current measurement value to be frozen in the display, min./max. values are also displayed at the press of a button.
Subject to change without notice. www.testo.com 0981 9664/msp/I/01.2018 Technical data / Accessories testo 425 testo 425 compact thermal anemometer with fixed velocity probe incl. temperature measurement and telescope (max. 820 mm), battery and calibration protocol Part no. 0560 4251 General technical data Operating temperature -20 to +50 °C Storage temperature -40 to +70 °C Battery type 9V block battery, 6F22 Battery life 20 h Dimensions 182 x 64 x 40 mm Weight 285 g Housing material ABS Accessories Part no. 0516 0191Case for measuring instrument and probes 0516 0221TopSafe, protects from impact and dirt 0515 00259V rech. battery for instrument, instead of battery 0520 0004ISO calibration certificate velocity hot wire, vane anemometer, Pitot tube; calibration points 1; 2; 5; 10 m/s 0520 0034ISO calibration certificate velocity hot wire, vane anemometer, Pitot tube; calibration points 5; 10; 15; 20 m/s Sensor types Thermal NTC Measuring range 0 to +20 m/s -20 to +70 °C Accuracy ±1 digit ±0.7 °C (remaining range) Resolution 0.01 m/s 0.1 °C 0520 0024ISO calibration certificate velocity hot wire, vane anemometer; calibration points 0.3; 0.5; 0.8; 1.5 m/s 0516 1201Service case for measuring instrument and probe, dimensions 454 x 316 x 111 mm