Close

Are you visiting bsria.com from outside your region? Visit your regional site for more relevant services and pricing.

Testo 425

Contact Instrument Solutions

Overview

The Testo 425 air velocity meter instrument covers the air velocity range from 0 to 20 m/s and the temperature range from - 20 to 70 °C. The compact 425 uses a heated wire NTC sensor on a hand held telescopic probe to measure velocity and temperature for applications in the HVAC industry.

Features

  • Multi-point averaging
  • Time averaging
  • Parallel temperature measurement
  • Velocity and temperature values at a glance
  • Volume flow capability
  • Max/min values
  • Backlight
  • Auto Off function

Technical

Measuring ranges 0 to 20 m/s, - 20 to 70°C

Accuracies ± (5 % ind + 0.03 m/s), 0 to 60 °C; ± (0.5 °C), remaining range ± (0.7 °C)

Resolutions 0.01 m/s, 0.1 °C

Operating temperature - 20 to + 70 °C

Probe head 7 mm diameter x 820 mm maximum length

Battery 9 V block type

Battery life 20 h

Weight 285 g

Dimensions 182 mm x 64 mm x 40 mm

Support documents

  • Download
  • Category
  • File type
  • Download
Download
Testo 425 user manual.pdf Testo 425 user manual
Category
Technical document
File type
Adobe Acrobat
Download (284 KB)