testo 420 – Volume Flow Hood
Product Descriptions
The new volume flow hood 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 easyith 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 finalize and send the measurement report directly on site.
• testo 420 differential pressure measuring instrument
• Volume flow hood for larger swirl outlets for measuring volume flow, temperature and relative humidity
• Impressively light with a weight of 2.9 kg
• Precise measurement even at swirl outlets thanks to integrated volume flow straightener
• Fast set-up, convenient operation and protocol creation on site using the App
| Technical data | |
| Measuring range | -20 to +70 °C |
| Accuracy | ±0.5 °C (0 to +70 °C) / ±0.8 °C (-20 to +0 °C) |
| Resolution | 0.1 °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) |
| Resolution | 0.1 %RH |
| Differential Pressure – Piezoresistive | |
| Measuring range | 120 to 120 Pa |
| Accuracy | ±2 % of mv + 0.5 Pa at +22 °C, 1013 hPa |
| Resolution | 0.001 Pa |
| Reaction time | 1 s (t90) |
| Absolute Pressure | |
| Measuring range | 700 to 1100 hPa |
| Accuracy | ±3 hPa |
| Resolution | 0.1 hPa |
| Reaction time | 1 s |
| Volume flow | |
| 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) |
| Resolution | 1 m³/h |
| General technical data | |
| Battery type | Alkali manganese, mignon, type AA |
| Battery life | 40 h |
| Display size | 3.5″ |
| Display function | Dot matrix |
| Display ligthing | with illumination |
| Interface | Micro-USB |
| Memory | 2 GB (internal) |
| Size hood | 360 x 360 mm , 305 x 1220 mm , 610 x 1220 mm for testo 420 |
