testo 425

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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 0191

Case for measuring instrument and probes

0516 0221

TopSafe, protects from impact and dirt

0515 0025

9V rech. battery for instrument, instead of battery

0520 0004

ISO calibration certificate velocity

hot wire, vane anemometer, Pitot tube; calibration points 1; 2; 5; 10 m/s

0520 0034

ISO 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

±(0.03 m/s +5% of m.v.)

±0.5 °C (0 to +60 °C)

±0.7 °C (remaining range)

Resolution

0.01 m/s

0.1 °C

0520 0024

ISO calibration certificate velocity

hot wire, vane anemometer; calibration points 0.3; 0.5; 0.8; 1.5 m/s

0516 1201

Service case for measuring instrument and probe, dimensions 454 x 316 x 111 mm