Measurement Solutions for Refrigeration Technology

17Measuring air velocity with thermal flow probetesto 425The compact anemometer withpermanently attached thermalflow probe inc. telescope (max.820 mm). The volume flow isshown directly in the display.Exact calculation of volume flowdue to input of duct area.Additionally, the instrument canbe switched over to the currenttemperature reading.• Temperature, flow and volumeflow measurement• Multi-point and timed meancalculation• Max/min values• Hold button to freeze readings• Display light• Auto Off function• TopSafe, the indestructibleprotective case (optional)testo 425testo 425, thermal anemometer withpermanently attached flow probe (Ø probehead 7.5 mm), incl. temperaturemeasurement and telescopic handle (max.820 mm), battery and calibration protocolPart no. 0560 4251Ø 7.5 mmTelescopic flow probe(max. 820 mm)Monitoring air velocity in air conditioning ductsAccessories Ordering dataPart no.Case for measuring instrument and probes 0516 0210TopSafe, protects from impact and dirt 0516 0221Recharger for 9V rechargeable battery, for external recharging of0515 0025 battery 0554 00259V rech. battery for instrument, instead of battery 0515 0025ISO calibration certificate velocity, hot wire, vane anemometer,Pitot tube; calibration points 1; 2; 5; 10 m/s 0520 0004ISO calibration certificate/Velocity, hot wire, vane anemometer,Pitot tube; calibration points 5; 10; 15; 20 m/s 0520 0034Technical dataProbe typeMeas. rangeAccuracy±1 digitResolutionOper. temp. -20 to +50 °CBattery typeWeightThermal0 to +20 m/s±(0.03 m/s +5% of mv)0.01 m/s9V block battery, 6F22285 gNTC-20 to +70 °C±0.5 °C (0 to +60 °C)±0.7 °C (remaining range)0.1 °CStorage temp. -40 to +85 °CBattery life 20 hDimensions 182 x 64 x 40 mmMeasure air flow, volume flow and temperature, with a thermal anemometertesto 405testo 405 is a thermalanemometer. It allows themeasurement of air flow velocity,volume flow and temperature.testo 405 is ideal for measuringthe flow in ducts or at ductopenings or draughty windows.• m/s and m³/h (volume flowcalculation 0 to 99,990 m³/h)• Measures in ducts and at ductopenings• Duct holder and holding clip forfast positioningtesto 405testo 405; thermal anemometer withduct holder, holding clip, batteryincludedPart no. 0560 4053Sensor protected byrotatable protectioncap, 300 mm longtelescopic handleØ 16 mmAccessories Ordering datatestovent 410, volume flow funnel, Ø 340mm/330x330 mm, incl. casetestovent 415, volume flow funnel, Ø 210mm/210x210 mm, incl. caseISO calibration certificate velocity, two point calibration;calibration points 5m/s and 10m/sISO calibration certificate velocity, hot wire, vane anemometer,Pitot tube; calibration points 1; 2; 5; 10 m/sPart no.0554 04100554 04150520 00940520 0004Easy-to-read readingsthanks to swivel displayIdeal for measurements in ductsTechnical dataMeas. range 0 to 5 m/s (-20 to 0 °C)0 to +99990 m³/h0 to 10 m/s (0 to +50 °C)Accuracy±1 digit±(0.1 m/s + 5% of mv) (0 to +2 m/s)±(0.3 m/s + 5% of mv) (remaining range)±0.5 °CResolution 0.01 m/s / 0.1 °C Battery life Approx. 20 hOper. temp. 0 to +50 °C Battery type 3 batteries Type AAA