Testo - volume flow measuring bonnet 420

2,450 Points

ID: 80366

The testo 420 volumetric flow measuring bonnet is the lightweight, precise and convenient solution for controlling volumetric flows at larger air inlets and outlets. Especially at swirl diffusers, the flow rectifier significantly reduces common measurement errors. This enables users to quickly and precisely comply with hygienic guidelines and specifications for room air quality in ventilation systems, for example in industry, offices or clean rooms.
With a uniquely low weight of less than 2.9 kg and ergonomic handles, handling is particularly easy. For a more comfortable reading of the measured values, the measuring device can be tilted and removed. In addition, mobile devices can be used as a second display, for customer and measurement data management and as a remote control by means of app connection via Bluetooth. For example, the use of a tripod is particularly safe and convenient for high ceilings. In addition, users can finalise and send the measurement report directly on site with the app.
Operating temperature: -5 ... +50 °C
Compatibility: requires iOS 12.0 / Android 6.0 or newer, requires mobile device with Bluetooth 4.0
Storage temperature: -20 ... +60 °C
Battery type: alkali-manganese, Mignon, type AA
Battery life: 40 hours (zeroing interval 10 seconds, display illumination off, Bluetooth off)
Display: dot matrix with illumination, 3.5 inch
Memory: 2 GB internal (approx. 18,000 measurements)
Interface: micro-USB
Data transmission: Bluetooth (for example for connection to testo 400).
App connection via Bluetooth: for quick and easy monitoring and reporting on site
Measuring range volume flow: 40 ... 4000 cubic metres/hour, accuracy ±1 digit approx. +12 cubic metres/hour at +22 °C, 1013 hPa (85 ... 3500), resolution approx. 1 cubic metres/hour
Measuring range NTC: -20 ... +70 °C, accuracy ±1 digit approx.: ±0.5 °C (0 ... +70 °C) ±0.8 °C (-20 ... 0 °C), resolution approx. 0.1 °C
Measuring range humidity sensor capacitive: 0 ... 100 %rh, accuracy ±1 digit approx. ±1.8 %rh +3 % v. Mw. at +25 °C (5 ... 80 %rh), resolution approx. 0.1 %rh
Measuring range differential pressure sensor: -120 ... +120 Pa, accuracy ±1 digit approx. ±2 % of Mw. +0.5 Pa at +22 °C, 1013 hPa, resolution approx. 0.001 Pa
Measuring range absolute pressure probe: +700 ... +1100 hPa, accuracy ±1 digit approx. ±3 hPa, resolution approx. 0.1 hPa
Material housing measuring instrument: ABS, base body PP, standard cover Nylon
Dimensions: approx. 610 x 610 mm
Weight: approx. 2.9 kg