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Technical data

testo 420 set

testo 420 flow hood base, 24" x 24" flow

hood, USB cable, batteries, soft case

w/ telescoping handle and wheels, NIST

Certificate

Part no. 400563 4200

General technical data

Operating temperature 23 to 140 °F (-5 to +60 °C)

Storage temperature -4 to 140 °F (-20 to +60 °C)

Weight

Standard hood

6.3 lbs. (2.9 kg)

24" x 24" (610 x 610 mm)

Battery type

Type AA

Battery life

40 h

Display

Dot matrix with illumination

Memory

2 GB internal

Interface

Micro USB

Warranty

2 years

Sensor types

Measuring range

50 to 2120 CFM

-4 to 158 °F /

(-20 to +70 °C)

Volume flow

Temperature

Accuracy

±1 digit

±3 % of m.v.

±0.9 °F (32 to 158 °F) /

±0.5 °C (0 to +70 °C)

Resolution

.5 CFM

0.1 °

0 to 100 %RH

Humidity sensor

±1.8 %RH

0.1 %RH

0 to 5" H2O /

(0 to 120 Pa)

Differential pressure

±2 % of m.v.

0.001 Pa

We measure it.

Flow straightener for significantly

more precise measurements at

turbulent outlets.

Bluetooth App allows for hands

free operation, displaying

measurement data on mobile

devices and finalizing the

measurement report on site.

Sturdy, wheeled tripod (optional)

with central fitting for safe

measuring of high ceiling outlets.

Functional principle of the flow

straightener.

testo 420