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:
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Differential pressure measurement, useful for checking filters in air conditioning and ventilation systems
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Calculate flow velocity and volume flow using an optional pitot tube
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Live data feed integration now available with the MeasureQuick App
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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
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3.5"
|
|
Display function
|
Dot matrix
|
|
Display ligthing
|
with illumination
|
|
Interface
|
Micro-USB
|
|
Memory
|
2 GB (internal)
|
|
Storage temperature
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-4° to 140 °F / -20 to +60 °C
|
