Absolute Pressure Meter Testo 511 is a compact and portable Pressure Meter designed for precise measurement of absolute pressure with an accuracy of ±3 hPa. This highly reliable Absolute Pressure Gauge is ideal for flow measurements, duct testing, laboratory applications, HVAC systems, and industrial processes. As a professional Digital Pressure Meter and Digital Pressure Gauge, it provides accurate pressure readings for critical monitoring tasks. By entering the on-site altitude above sea level, the Testo 511 automatically converts measured values into barometric air pressure, allowing easy comparison with sea-level conditions. It also enables users to determine barometric altitude differences between two locations, making it an efficient and versatile tool for field and industrial applications. Applications:  laboratory testing, cleanroom pressure verification, industrial process monitoring, environmental and weather monitoring etc.