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Testo 420 Volume Flow Hood
Includes: testo 420 flow hood base, 24" x 24" flow hood, USB cable, batteries, soft case w/ telescoping handle and wheels.
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The testo 420 is used for volume flow measurements (main application), Pitot tube measurements and pressure measurements for air conditioning and ventilation systems. Thanks to its interchangeable flow hoods, the testo 420 can be used for air inlets and outlets of various sizes. With the additional App (Android/iOS), the readings can be conveniently displayed on a tablet or smartphone, and in addition a measurement can be started, stopped and saved via the App.
The testo 420 is the light, precise and convenient solution for regulating volume flows at larger air intakes and outlets. At swirl outlets in particular, the flow straightener significantly reduces the usual measurement errors. This allows users to fulfil hygienic Indoor Air Quality guidelines and stipulations in ventilation and air conditioning systems quickly and precisely, e.g. in industry, office rooms or in cleanrooms.
Handling is especially easy with a uniquely low weight of less than 2.9 kg and ergonomic handles. The measuring instrument can be tilted and removed for more comfortable readout of the measurement values. In addition to this, mobile devices can be used via Bluetooth App integration as a second display and remote control. This makes the use of a tripod for high ceilings especially secure and comfortable. Users can furthermore use the App to finalise and send the measurement report directly on site. The testo 420 App is completely free and is available for iOS from the App Store and Android via Google Play.
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.
|Measuring range||-20 to +70 °C.|
|Accuracy||±0.5 °C (0 to +70 °C)
±0.8 °C (-20 to +0 °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).
|Differential Pressure - Piezoresistive|
|Measuring range||-120 to +120 Pa.|
|Accuracy||±2 % of mv + 0.5 Pa at +22 °C, 1013 hPa.|
|Reaction time||1 s (t90).|
|Measuring range||700 to 1100 hPa.|
|Reaction time||1 s.|
|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).|
|General technical data|
|Dimensions||610 x 610 mm (Standard hood).|
|Operating temperature||-5 to +50 °C.|
|Battery type||Alkali manganese, mignon, type AA.|
|Battery life||40 h.|
|Display function||Dot matrix.|
|Display ligting||with illumination.|
|Interface||Micro-USB; Bluetooth® 4.0 wireless technology.|
|Memory||2 GB (internal).|
|Storage temperature||>-20 to +60 °C.|
|Standard Hood dimensions||610 x 610 mm.|
|Testo 420 warranty||2 years.|
No customer reviews for the moment.
|Replacement Hood||Replacement hood (360 x 360 mm) for mounting on the testo 420 volume flow hood.||0554 4200|
|Replacement Hood||Replacement hood (305 x 1220 mm) for mounting on the testo 420 volume flow hood.||0554 4201|
|Replacement Hood||Replacement hood (610 x 1220 mm) for mounting on the testo 420 volume flow hood.||0554 4202|
|Replacement Hood||Replacement hood (915 x 915 mm) for mounting on the testo 420 volume flow hood.||0554 4203|
|Extendable Tripod||Extendable tripod (up to 4 m) with wheels – ideal for measuring at ceiling outlets.||0554 4209|
|Hose||Connection hose; silicone; 5 m long; max. load 700 hPa (mbar).||0554 0440|
|Hose||Connection hose silicone-free for differential pressure measurement, length 5 m, load up to maximum 700 hPa, (mbar).||0554 0453|
|Pitot Tube||Pitot tube, 500 mm long, stainless steel, for measuring flow velocity.||0635 2045|
|Pitot Tube||Pitot tube, 350 mm long, stainless steel, for measuring flow velocity.||0635 2145|
|Pitot Tube||Pitot tube, length 1000 mm, stainless steel, for measuring flow velocity.||0635 2345|