Description:Measurement of gas flow and static pressure,Measurement menu for pressure drop test including alertsSimple configuration and determination of volume flow with Pitot tubeMagnetic holder for easy attachmentHandy and intelligent: the compact testo 510i differential pressure measuring instrument featuring professional measuring technology and smartphone operation for measuring differential pressure, air flow velocity and volume flow. Readings can be viewed conveniently on your smartphone/tablet via the testo Smart Probes App and emailed directly.Operating temperature: -20 to +50 °C Storage temperature: -20 to +60 °CDifferential pressure (internal sensor) – Piezoresistive Measuring range: -150 to +150 hPaAccuracy: ±0.05 hPa (0 to +1 hPa)±(0.2 hPa + 1.5 % of mv) (+1 to +150 hPa); Resolution: 0.01 hPa Accessories: TESTO 510 i - differential pressure measuring instrument with smartphone operation