Compact Vacuum Meter / Data Logger Absolute Pressure 1600 to 1 mbar The versatile VD81 digital vacuum meter measures absolute pressure in the rough vacuum range. It is available with USB interface and can be used as data logger. The VD81 can be operated with either battery or external power supply making it ideal for both, portable or stationary applications. Typical Applications • Checking and setup of vacuum plants • Chemically resistant ceramic sensor with FKM sealing • Operational control and documentation at vacuum plants and pumps • High repeatability • Modern teaching aid with PC interface • Vacuum connection by small flange, G1/4 female thread or screw in hose nozzle • Leak tests • Packing machines • Analysis instruments • Chemical process engineering • Compact, easy to use • Min/Max Memory: Storage and display of high and low values • Automatic switch off or continuous operation • Pressure units mbar, Torr, hPa • Exact readjustment without a potentiometer • USB interface • Easy configuration of the vacuum meter by VacuGraphTM software or directly at the instrument • Measuring rate of the data logger can be arbitrarily set by means of VacuGraphTM software or directly selected at the instrument • Optionally measurements are saved only on pressure change to reduce data volume • Online data transfer to PC via USB • Data logger functionality: Save up to 2000 measurements in the vacuum meter and push button data transfer to a PC; no PC connection is necessary during the measurement • VacuGraphTM software for saving and plotting measurements on PC Actual Pressure • Replacement of mercury manometers in research and teaching, laboratories and manufacturing • Excellent long term stability • User friendly operational concept

Technical Data Product Codes _______________________________________________________________________________________ Measuring Principle Piezo resistive, independent of gas type _______________________________________________________________________________________ Materials In Contact With Vacuum Stainless steel 1.4305, Al2O3 ceramic, FKM _______________________________________________________________________________________ Measurement Range 1600 - 1 mbar (1200 - 1 Torr), max. overpressure 4 bar absolute _______________________________________________________________________________________...