Technical Data; Accessories/Spare Parts - TESTO 425 Mode D'emploi

9.

Technical data

Characteristic
Parameters
Measuring range
Resolution
Accuracy
Probe
Measuring rate
Operating temperature range -20...+50°C / -4...+122°F
Storage temperature
Voltage supply
Battery life
Protection class
EC Directive
Warranty
10. Accessories/spare
parts
Name
TopSafe testo 425, protects from impact and dirt particles
For a complete list of all accessories and spare parts,
please refer to the product catalogues and brochures or
look up our website: www.testo.com
Value
Flow velocity (m/s)
Temperature (°C/°F)
0...+20m/s
-20...+70°C/-4...+158°F
0.01m/s
0.1°C / 0.1°F
±0.03m/s+5% of reading
±0.5°C/±0.9°F (0...+60.0°C/+32...+140°F)
±0.7°C/±1.3°F (rest of range)
Telescopic flow velocity/temperature probe (hot wire probe)
with NTC temperature sensor (permanently connected)
2/s
-40...+85°C / -40...+185°F
1x 9V monobloc battery/rech. battery
approx. 20h
with TopSafe (accessory part): IP65
89/336/EEC
2 years
9. Technical data 31
Part no.
0516 0221