Relative Pressure max. -1060 ... +340 mbarOverview VD800-series vacuum meters ■ Big graphic display ■ Intuitive menu-driven handling ■ Direct graphical visualization of pressure curves ■ Integrated data logger for saving multiple measurement series with RTC data ■ Storage of minimum and maximum pressures achieved during measurement ■ Automatic switch-off or continuous operation ■ Optical and acoustical alarm when reaching a predefined threshold ■ Charging per standard USB-C cable ■ Quick and easy data-transfer to PC, tablet, or smartphone via USB-C or wireless via Bluetooth® LE (optional) ■ Pressure units: mbar, Torr, hPa ■ Selectable menu language ■ Adjustable logging rate of 20 ms to 60 s for fast processes ■ VacuGraphTM-Software: To read-out data logger, and to visualize, analyze, and save measurements Overview VD850 vacuum meter ■ Wide measuring range of combined piezo/Pirani sensor ■ Measurement of absolute and relative pressure ■ Pirani sensor with durable, elastic helix filament ■ Integrated metal screen for protection against contamination such as oil and solvent vapors ■ High resolution and precision in whole measuring range, ideal e. g. for the maintenance of vacuum pumps and systems ■ Stable measuring values due to optimized temperature compensation ■ Excellent long-term stability ■ Leak-rate calculation via rate of rise measurement ■ Adjustable gas type correction factor ■ Long battery performance of min. 48 hours ■ Calibrated exchange sensor heads for quick and easy replacement by trained personnel Vacuum Instruments

Technical Data Measurement Priciple Piezoresistive / heat conducting Pirani (Pirani depending on gas type) Measurement Range Absolute pressure 1200 - 5e-5 mbar (900 - 5e-5 Torr) Relative pressure max. -1060 ... +340 mbar (-795 ... +255 Torr) Accuracy Absolute pressure: 1200 ... 40 mbar: 0,3% f. s. (of scale value) 40 ... 1,0x10-3 mbar: 10% f. r. (of measured value) Relative pressure: 0,25% f. spane Repeatability 1200 ... 40 mbar: 0,1% f. s. (of scale value) 40 ... 1e-2 mbar: 2% f. r. (of measured value) Resolution 1200 ... 1000 mbar: 1 mbar | 1000 ... 2,0 mbar: 0,1 mbar Materials with Vac.-Contact...

■ VD850 Compact vacuum meter DN 16 ISO-KF flange incl. WUSB_AC001 ■ VD850BT Compact vacuum meter DN 16 ISO-KF flange Bluetooth® LE incl. WUSB_AC001 protective plastic case silicone protective cover replacement sensor head charger 5 V VacuGraph™ software cable USB-C to USB-A, 1.0 m cable USB-C to USB-C, 2.0 m Further accessories as well as detailed information about our product family can be found in our VD800 brochure. Vacuum Instruments www.thyracont-vacuum.com