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testo 425 - Hot wire anemometer

Order-Nr. 0560 4251

Where to buy

Telescoping hot wire probe
Measures velocity, volume flow (CFM), and temperature
Timed and multi-point average flow calculations
Auto-off function saves battery life

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Details

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

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Technical Data

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

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
Weight	10 oz. / 285 g
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