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Testo 420 air capture hood including measuring instrument, 610 x 610 mm hood, 5 x tension rods, USB cable, batteries and trolley

Air Capture Hood - Testo 420
Model No: Testo 420 Part No: 0563 4200

Testo 420 air capture hood for larger air inlets and outlets enables fast and precise compliance with hygiene guidelines and requirements concerning room air quality. It provides reliable support with the calculation of the overall air capture on HVAC systems, for instance in hospitals, office buildings or commercial buildings.

  1. Less than 2.9 kg weight
  2. Flow straightener for more precise measurement at swirl outlets
  3. Removable and tiltable measuring instrument with a large display
  4. App integration via Bluetooth for fast and easy monitoring and reporting on site


Temperature - NTC
Measuring Range -20 to +70 °C
Accuracy ±0.5 °C (0 to +70 °C) ±0.8 °C (-20 to +0 °C)
Resolution 0.1 °C
Reaction time 45 s (t90)
Humidity - Capacitive
Measuring range 0 to 100 %RH
Accuracy ±1.8 %RH + 3 % of mv at +25 °C (5 to 80 %RH)
Resolution 0.1 %RH
Volume flow
Measuring range 40 to 4000 m³/h
Accuracy ±3 % of mv + 12 m³/h at +22 °C 1013 hPa (85 to 3500 m³/h)
Reaction time 1 s (t90)
Resolution 1 m³/h
Differential Pressure - Piezoresistive
Measuring range -120 to +120 Pa
Accuracy ±2 % of mv + 0.5 Pa at +22 °C, 1013 hPa
Resolution 0.001 Pa
Reaction time 1 s (t90)
Absolute Pressure
Measuring range 700 to 1100 hPa
Accuracy ±3 hPa
Resolution 0.1 hPa
Reaction time 1 s
General technical data
Dimensions 610 x 610 mm (Standard hood)
Operating temperature -5 to +50 °C
Storage temperature -20 to +60 °C
Battery type Alkali manganese, mignon, type AA
Display size 3.5"
Interface Micro-USB; Bluetooth® 4.0 wireless technology
Memory 2 GB (internal)
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