■ Wide measuring range due to combined piezo/Pirani sensor, ideal e. g. for the maintenance of vacuum pumps and systems ■ Excellent long term stability ■ Pirani sensor with durable, elastic helix filament ■ Stable measuring values due to optimized temperature compensation ■ Integrated data logger for up to 2000 measurement values Overview VD8 vacuum meters ■ Can be used as a portable instrument or for permanent installation in vacuum facilities. The gauges can be operated by a battery or a plugin power supply ■ Integrated data logger for up to 2000 measurement values ■ Vacuum meters can be placed directly into a vacuum chamber, connected to an appliance with their flange or with a suitable adaptor ■ Storage of minimum and maximum pressures achieved during measurement ■ Pressure units: mbar, Torr, hPa ■ High battery lifetime due to cycled measurements; the user can choose between automatic switch off (time adjustable) for battery saving or continuous operation ■ USB interface for easy push button data transfer to PCs, but no PC connection is necessary during measurements ■ VacuGraph™ Software: To visualize, analyze and save measurements on a PC (lite version free of charge) Vacuum Instruments

Technical Data Measurement Principle Piezoresistive / heat conduction Pirani, (Pirani depending on gas type) Measurement Range 1200 - 5e-4 mbar (900 - 5e-4 Torr) Resolution 1200 - 1000 mbar: 1 mbar <1 mbar: 2 digits mantissa, 1 decimal place Materials With Vac. Contact Stainless steel 1.4307, gold, nickel, tungsten, glass, FKM Operating Temperature +5...+50 °C Power Supply 9 V battery or 12.15 VDC external Power Consumption Approx. 110 mW (clocked) Operating Time Li-battery: <100h, 6LR61 Alkaline:<40h Serial Interface Mini-USB, Type B, 5pin, female, Virtual Com Port protocol Electrical Connection...

VD85 - Compact Vacuum Meter Piezo / Pirani, Data Logger Absolute Pressure 1200 to 5 x 10-⁴ mbar Model designations Compact vacuum meter DN 16 ISO-KF flange power supply 15 V, incl. change-over plug, EURO, US, UK, AUS VD8ALK alkaline battery 9 V (vacuum tested); WUSB0002 interface cable, 2 m, USB; VGR VacuGraph™ software Further accessories as well as detailed information about our product family can be found in our VD8 brochure.