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
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) |
Resolution |
0.1 °F / 0.1 °C |
Reaction time |
45 sec (t90) |
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 |
Resolution |
0.1 %rH |
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) |
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 |
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 |
Reaction time |
1 sec (t90) |
Resolution |
1 m³/h |
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 |