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What’s Included:
0563 4200 -- testo 420 accurate, lightweight flow hood base with Bluetooth; USB cable, batteries, soft case w/ telescoping handle and wheels

Overview: The testo 420 accurate, lightweight flow hood with Bluetooth is the precise and convenient solution for measuring volume flows at supplies and returns. Handling this capture hood with flow straightener and tiltable display is especially easy with the low weight of less than 6.2 lbs. and ergonomic handles.

Key Features:
  • Rugged and toughflow hood that weighs less than 6.2 lbs. (2.9 kg.)
  • Large, easy to read, tiltable, backlit display (removable) makes it easy to see the readings
  • Flow straightener for more precise measurement at turbulent outlets
  • App integration via Bluetooth for fast and easy monitoring and reporting on site

Technical data
  • EU-/EG-guidelines: EU-guideline 2014/30/EU
  • Warranty: 2 years
  • Battery type: Alkaline, type AA
  • Battery life: 40 h
  • Display size: 3.5"
  • Display function: Dot matrix
  • Display lighting: with illumination
  • Interface: Micro-USB; Bluetooth 4.0 wireless technology
  • Memory: 2 GB (internal)
  • Storage temperature: -4° to 140 °F / -20 to +60 °C
  • Weight: 102 oz. / 2900 g
  • Dimensions: 24 x 24 in. (Standard hood) / 610 x 610 mm (Standard hood)
  • Operating temperature: 23° to 122 °F / -5 to +50 °C
Hide Description
Product Type:









Volume Flow

Operating Temp Range:

-20°C to 60°C

-4°F to 140°F

Measurement Range:

-4° to 158 °F / -20 to +70 °C


2 Years


USB Cable



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