testo 420 Air Capture Hood (Flow Hood) 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 Overview The rugged and tough testo 420 balometer is an accurate, lightweight flow hood with Bluetooth. • The capture hood with flow straightener significantly improves measurement accuracy, saving you time and headaches for these difficult situations. • The display can be tilted for a more comfortable readout. • Bluetooth allows for connection to mobile devices, which can be used as a second display or remote control • The App can be utilized to finalize and send measurement reports while still on site • Use of an optional tripod is especially easy for high ceilings Delivery Scope (What's Included): testo 420 volume flow hood including measuring instrument, 610 x 610 mm hood, 5 x tension rods, USB cable, batteries, trolley and calibration protocol. Temperature - NTC Technical data Measuring range -4° to 158 °F / -20 to +70 °C Accuracy ±1 °F (32° to 158 °F) / ±0.5 °C (0 to +70 °C) ±1.4 °F (-4° to 32 °F) / ±0.8 °C (-20 to +0 °C) Resolution 0.1 °F / 0.1 °C Reaction time 45 sec (t90) Top Humidity - Capacitive Technical data Measuring range 0 to 100 %rH Accuracy ±1.8 %rH + 3 % of mv at +77 °F / ±1.8 %RH + 3 % of mv at +25 °C (5 to 80 %rH) Resolution 0.1 %rH Top Differential Pressure Technical data Measuring range -0 to 0 InH₂O / -120 to 120 Pa Accuracy ±2 % of mv + 0.0 InH₂O at +72 °F, 405 InH₂O / ±2 % of mv + 0.5 Pa at +22 °C, 1013 hPa Resolution 0.000 InH₂O / 0.001 Pa Reaction time 1 sec (t90) Top Absolute Pressure Technical data Measuring range 280 to 440 InH₂O / 700 to 1100 hPa Accuracy ±1 InH₂O / ±3 hPa Resolution 0.0 InH₂O / 0.1 hPa Reaction time 1 sec Top Volume flow Technical data Measuring range 40 to 4000 m³/h Accuracy ±3 % of mv + 12 m³/h at +72 °F / ±3 % of mv + 12 m³/h at +22 °C 405 InH₂O (85 to 3500 m³/h) / 1013 hPa (85 to 3500 m³/h) Reaction time 1 sec (t90) Resolution 1 m³/h Top General technical data 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 ligthing 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 Accessories Product name Order no. Extendable tripod (up to 4 m) with wheels 0554 4209 Top Additional accessories and Spare parts Product name Order no. Connection hose, silicone, 15 ft. long 0554 0440 Connection hose silicone-free for differential pressure measurement, length 5 m, load up to maximum 700 hPa, (mbar) 0554 0453 Pitot tube, 500 mm long, stainless steel, for measuring flow velocity 0635 2045 Pitot tube, stainless steel, for measuring flow velocity 0635 2145 Pitot tube, 1000 mm long, stainless steel, measures velocity in connection with pressure probes 0638 1345/..1445/..1545 0635 2345 Top Certificates Product name Order no. With a Testo NIST Calibration Certificate, we will calibrate your Testo meter to three factory standard velocity points. Testo NIST Velocity Calibration Certificates are archived for 7 years, ensuring that crucial data is available when needed. 400520 4401
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