DatasheetPrecise, reliable measurement of all air velocity and IAQ parameters with the testo 440 dP: the multifunction measuring instrument features an integrated differential pressure sensor and intuitive operation with clearly structured measurement menus. Adjusting air conditioning and ventilation systems, monitoring air quality or carrying out comfort level measurements – thanks to versatile options for combining with high-quality, digital probes, you are ideally equipped to carry out your measuring task (please order probes separately).
The device can store up to 7500 measurement reports, which can be exported via USB in CSV format for further analysis or documentation. Whether used for duct measurements, comfort studies, cleanroom monitoring, or IAQ assessments, the testo 440 dP is engineered for accuracy, ease of use, and operational efficiency in demanding environments.
Delivery Scope
Technical data
Temperature – NTC
| Measuring range |
-40 to +150 °C
|
|---|---|
| Accuracy |
±0.4 °C (-40 to -25.1 °C)
±0.4 °C (+75 to +99.9 °C)
±0.5 % of mv (Remaining Range)
±0.3 °C (-25 to +74.9 °C)
|
| Resolution |
0.1 °C
|
Temperature – TC Type K (NiCr-Ni)
| Measuring range |
-200 to +1370 °C
|
|---|---|
| Accuracy |
±(0.3 °C + 0.3 % of mv)
|
| Resolution |
0.1 °C
|
Differential pressure (internal sensor) – Piezoresistive
| Measuring range |
-150 to +150 hPa
|
|---|---|
| Accuracy |
±0.05 hPa (0 to 1.00 hPa)
(1.01 to +150 hPa)
±0.2 hPa + 1.5 % of mv
|
| Resolution |
0.01 hPa
|
General technical data
| Weight |
250 g
|
|---|---|
| Dimensions |
154 x 65 x 32 mm
|
| Operating temperature |
-20 to +50 °C
|
| Connectable probes |
1 x digital probe with cable or 1 x Temperature NTC TUC, 1 x digital Bluetooth probe or testo Smart Probe, 1 x differential pressure (internal), 1 x Temperature TC Type K
|
| Product colour |
black/orange
|
| Battery life |
12 h (typically vane measurement)
|
| Battery type |
3 AA mignon 1.5 V
|
| Interface |
Bluetooth®; USB
|
| Storage temperature |
-20 to +50 °C
|
