Specification for: testo 420 – Volume flow hood
| Accuracy | 3 % of mv + 12 m/h at +22 C 1013 hPa (85 to 3500 m/h) |
| Battery life | 40 h |
| Battery type | Alkali manganese mignon type AA |
| Data transfer | Bluetooth |
| Dimensions | 610 x 610 mm (Standard hood) |
| Display function | Dot matrix |
| Display ligthing | with illumination |
| Display size | 3.5" |
| EU-/EG-guidelines | EU-guideline 2014/30/EU |
| Interface | Micro-USB; Bluetooth 4.0 wireless technology |
| Measuring range | 50 to 4000 m/h |
| Memory | 2 GB (internal) |
| MPN | 0563 4200 |
| Operating temperature | -5 to +50 C |
| Radio range | 10 m |
| Range | Climate |
| Reaction time | 1 s (t) |
| Resolution | 1 m/h |
| Storage temperature | -20 to +60 C |
| System requirements | requires iOS 12.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0 |
| Type | Anemometer |
| Weight | 2900 g |




