Mold Inspection Consulting and Remediation Organization
15 Years
close menu

testo 420 Differential Pressure Measuring Instrument

The CEC compliant testo 420 differential pressure measuring instrument is suitable for accurate differential pressure measurement up to 120 Pa, suitable for checking filters in HVAC systems.

More info

testo 420 Differential Pressure Measuring Instrument
Roll over image to zoom Click image to expand
  • testo 420 Differential Pressure Measuring Instrument

The CEC compliant testo 420 differential pressure measuring instrument is suitable for accurate differential pressure measurement up to 120 Pa, suitable for checking filters in HVAC systems. The testo 420 calculates flow velocity and volume flow. This instrument can also be used for absolute pressure measurement.

Features:

  • Differential pressure measurement, useful for checking filters in air conditioning and ventilation systems

  • Calculate flow velocity and volume flow using an optional pitot tube

  • Live data feed integration now available with the MeasureQuick App

  • Match with a Testo CEC compliant air flow capture hood to measure volume flows at supplies and returns (0563 4200)

Technical Data

Differential Pressure

Measuring range

-0.480 to 0.480 InH₂O / -120 to +120 Pa

+19.7 to +2756 fpm / +0.1 to +14 m/s

Accuracy

±2 % of mv + 0.002 InH₂O at +72 °F, 405 InH₂O / ±2 % of mv + 0.5 Pa at +22 °C, 1013 hPa

Resolution

0.001 InH₂O / 0.001 Pa

0.01 fpm / 0.01 m/s

Reaction time

1 sec (t90)

Absolute Pressure

Measuring range

280 to 440 InH₂O / 700 to 1100 hPa

Accuracy

±1 InH₂O / ±3 hPa

Resolution

0.1 InH₂O / 0.1 hPa

Reaction time

1 sec

General technical data

Dimensions

6 x 3 x 1 in. / 150 x 85 x 35 mm

Operating temperature

23° to 122 °F / -5 to +50 °C

EU-/EG-guidelines

EU-guideline 2014/30/EU

Battery type

Alkaline, type AA

Battery life

40 h

Display size

3.5"

Display function

Dot matrix

Display ligthing

with illumination

Interface

Micro-USB

Memory

2 GB (internal)

Storage temperature

-4° to 140 °F / -20 to +60 °C