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VD85 - Digital Compact Vacuum Meters / Data Loggers

Absolute Pressure 1200 - 5 x 10-4 mbar (=hPa), 900 - 5 x 10-4 Torr

VD85 digital vacuum meter reads pressure over 7 decades in the rough and fine vacuum range. Its sensor combination of piezo and Pirani guarantees high resolution and precision over the whole range. It is equipped with USB interface and can be used as data logger (save up to 2000 measurements).
The VD85 can be operated with battery or external power supply making it ideal for either portable or stationary applications.


  • Wide measuring range due to combined sensor piezo/Pirani
  • High precision and optimal resolution over the whole range
  • Min/Max memory: Storage and display of high and low values
  • Excellent long term stability
  • Gas correction factor for correct pressure readings
  • Pressure units mbar, Torr, hPa
  • Automatic switch off and continuous operation
  • Continuous pressure display over the whole range

Typical Applications

  • Check and setup of vacuum appliances
  • Diagnosis and documentation of vacuum pumps
  • Leak tests
  • Service and maintenance
  • Coating plants
  • Evaporators
  • Graphical evaluation of pump down diagrams
Technical Data
Measuring Principle Piezo resistive, independent of gas type, Pirani, depending on gas type
Materials In Contact With Vacuum Stainless steel 1.4307, nickel, gold, tungsten, glass, FKM
Measurement Range 1200 to 5 x 10-4 mbar (900 to 5 x 10-4 Torr), max. overpressure 2 bar absolute
Resolution 1 mbar: 1200 to 1000 mbar
0.1 mbar: 1000 to 1 mbar 
2-digit plus exponent: < 1 mbar (e. g. 8.3 x 10-2)
Accuracy +-0.3% full scale: 1200 to 10 mbar
< +- 10% from reading: 10 to 2 x 10-3 mbar
< factor 2: < 2 x 10-3 mbar
Measuring Rate 1.0 s
Data Logging Rate 1...999 s
Operating Temperature +5...+50 °C
Storage Temperature -20...+60 °C
Power Supply 9 V block battery (alt. NiCd recharge. battery) or 15 VDC external
Electrical Connection Jack for external power supply
Power Consumption Approx. 60 mW
Operating Time Max. 100 h with 9 V lithium battery, max. 40 h with 9 V Alkali-Mangan battery
Sensor Connection Sensors integrated in the instrument
Vacuum Connection Stainless steel small flange DN 16 ISO-KF
Protection Class IP40
Display LCD 12 mm
Weight Approx. 230 g (battery included)

Additional Info

Additional Info

2.00 LBS
Calculated at Checkout