testo 425 - Hot wire anemometer

Order-Nr.  0560 4251

  • Telescoping hot wire probe

  • Measures velocity, volume flow (CFM), and temperature

  • Timed and multi-point average flow calculations

  • Auto-off function saves battery life

The testo 425 hot wire anemometer can measure cubic feet per minute (CFM) when conducting duct testing, as well as easily switch between flow and temperature readings. The telescoping handle of the thermal probe on this CFM meter makes it easy to reach ductwork above your head.

Product Description

The testo 425 hot wire anemometer provides incredible accuracy and is easy to use. The telescoping handle of this CFM meter extends to 33 inches, putting even high-up ductwork within reach. The testo 425 anemometer is ideally suited for low flow and velocity applications, and provides accurate, fast, and easy readings.
  • Min/Max/Average values make comparisons fast and easy
  • Compact thermal sensor is ideal for in-duct readings
  • Measures air velocity from 0 to 4000 FPM
  • Bright backlit display provides easy viewing in any environment

 

Delivery Scope

testo 425 thermal anemometer with permanently attached flow probe including temperature measurement and telescope (max. 820 mm), calibration protocol, and battery
Temperature - NTC

Measuring range

-4° to 158 °F / -20 to +70 °C

Accuracy

±0.9 °F (32° to 140 °F) / ±0.5 °C (0 to +60 °C)

±1.3 °F (Remaining Range) / ±0.7 °C (Remaining Range)

Resolution

0.1 °F / 0.1 °C

Velocity - Thermal anemometer

Measuring range

0 to +3937 fpm / 0 to +20 m/s

Accuracy

±(5.91 fpm + 5 % of mv) / ±(0.03 m/s + 5 % of mv)

Resolution

1.97 fpm / 0.01 m/s

General technical data

Dimensions

7 x 3 x 2 in. / 182 x 64 x 40 mm

Operating temperature

-4° to 122 °F / -20 to +50 °C

Housing

ABS

Battery type

9V block battery, 6F22

Battery life

20 h

Storage temperature

-40° to 158 °F / -40 to +70 °C

Weight

10 oz. / 285 g

Cases

Order Number: 0516 1201