■ External, detachable Pirani sensor, ideal for complex appliances or for checking the pressure at several measuring stations e. g. for checking the vacuum insulation of liquid gas tanks ■ Pirani sensor with durable, elastic helix filament ■ Measuring values are stable due to optimized temperature compensation ■ Integrated metal facing protects the sensor against contamination like oil vapours or solvent vapours ■ Gas type correction factors for immaculate pressure readings 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 Heat conduction Pirani (gas type dependent) Measurement Range 100 - 1e-3 mbar (75 - 1e-3 Torr) Resolution 100 - 10 mbar: 1 mbar, <10 mbar: 2 digits mantissa, 1 decimal place Materials With Vac. Contact Stainl. steel 1.4305, nickel, tungsten, glass 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 Mini-jack 2.5 mm for plug-in power supply...

■ VD84/1 Compact vacuum meter with probe type VSP841 ■ VD84/2 Compact vacuum meter with probe type VSP842 ■ VSP841 Passive (external) Pirani sensor DN 16 ISO-KF flange ■ VSP842 Passive (external) Pirani sensor 1/8" NPT male VD8N4 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; Further accessories as well as detailed information about our product family can be found in our VD8 brochure. THY RAC O NT Vacuum Instruments www.thyracont-vacuum.com