This multifunctional handheld instrument is used to measure differential pressure, airflow, air speed and temperature, as well as for the registration of humidity and barometric pressure. It is suitable for use for acceptance measurements at ventilation systems according to DIN EN 12599; 4 PA Pressure Test to confirm the combustion air availability; measurement of the ventilation loss and the surface loss; flow pressure, installation pressure, standing pressure, jet pressure; flow measurement in air and flue gas ducts; and a data logger. It is highly accurate and incorporates “no-drift” technology. It is tested to comply with standards for ventilation for buildings. It has a USB interface to communicate with your PC, or can print directly with the Wöhler TD 600 thermal fast printer. It can be operated with one hand and has a 4-button keypad.