425 TESTO, 425 Datasheet - Page 2

• Manufacturer Part Number: 425
• Description: ANEMOMETER, THERMO
• Manufacturer: TESTO

Specifications of 425

• Air Velocity Range: 0m/s To 20m/s
• Operating Temperature Range: -20°C To +50°C
• External Height: 182mm
• External Width: 64mm
• External Depth: 40mm
• Svhc: No SVHC (15-Dec-2010)
• Battery Lifetime: 20h
• External Length /: RoHS Compliant

Case for measuring instrument and probes
TopSafe, protects from impact and dirt
Recharger for 9V rechargeable battery
For external recharging of 0515 0025 battery
9V rechargeable battery for instrument
Instead of battery
ISO Velocity Calibration.
5 points across range
For further information please contact:
Testo Ltd
Newman Lane
Alton
Hampshire
GU34 2QJ
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.testo.co.uk
testo 425
The testo 425 is an easy to use,
compact anemometer with an
attached thermal probe on a
telescopic handle.
Duct measurements are easily
entered into the testo 425 and the
volume flow measurement is
calculated and shown on the
clear display. In addition, it is
possible to switch easily between
flow and temperature readings.
Timed and multi-point mean flow
calculations allow easy flow
analysis and temperature variation
monitoring.
Min-Max values are one button
simple, while the "Hold" function
freezes the current readings in the
display for easy data recording.
testo 425, thermal anemometer with
permanently attached flow probe,
including temperature measurement
and telescopic handle (max. 820 mm),
battery and calibration protocol
Part no.
0560 4251
Accessories
Zubehör
Compact Thermal Anemometer
Temperature, flow and volume
flow measurement
Multi-point and timed mean
calculation
Max/min values
Hold button to freeze readings
Display light
Auto Off function
Part no.
0516 0210
0516 0221
900 000 0123
0515 0025
300 520 0012
Technical data
Probe type
Meas. range
Accuracy
±1 digit
Resolution
Oper. temp.
Storage temp.
Battery type
Battery life
Using the testo 425 to monitor the volume flow of exhaust air
Using the testo 425 to set the air input in a kitchen
Thermal
0 to +20 m/s
±(0.03 m/s +5% of mv)
-20 to +50 °C
-40 to +85 °C
20 h
0.01 m/s
9 V
Dimensions
Weight
Material/Housing
Warranty
NTC
-20 to +70 °C
±0.5 °C (0 to +60 °C)
±0.7 °C (remaining range)
0.1 °C
182 x 64 x 40
285 g
ABS
2 years