VPAC™II – Through-Valve Loss Control Instrument

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The VPAC™II is an acoustic emission instrument based on over 10 years of research. The VPAC™II can estimate the quantity of material leaking through the valve using the accompanying proprietary software. With hundreds of systems currently in use, the VPAC™II valve leak detector is the instrument of choice for through valve leak detection.

The user interface is simple and intuitive, and the unit retains all settings even when powered down. The instrument is powered by four rechargeable AA batteries which will last several weeks in typical use. Battery replacement and charging is quick and easy, so downtime is minimized.

The VPAC™II valve leak detector unit contains all the features you need to determine if valves are leaking, where they’re leaking, and at what rate they’re leaking.

When used on gas systems, the VPAC™II valve leak detector helps to achieve valve lead detection of leaks as small as 1-liter per minute. This is because the sensor is virtually on top of the leak source and attenuation of the signal is not a factor.


  • Stores a reading, as well as upstream and downstream readings, for up to 500 valves at a time.
  • Loads a complete testing route with valve names & physical properties from VPACwin™.
  • Calculates Leak rates directly on the unit.
  • Transfers all stored data to notebook or desktop PC with VPACwin™ software via a simple, wireless Bluetooth interface.


Size (LxWxH) 4.75” x 1.4” x 7”
Weight 1 lb
Power Source Nickel Metal Hydride Battery Pack
Battery Life 100 hours
LCD Transflective LCD on Glass
Backlight Blue LEDs with diffuser
Wireless Interface Type Bluetooth Class B
Wireless Interface Range 50 ft
Operating Temperature -15º - 158ºF (-20ºC – 55ºC)
Storage Temperature -40ºC – 185ºF (-40º - 85ºC)


  • 1x VPAC™ II IS valve leak detector
  • 2x D9203-IS sensors (VPAC sensor)
  • Wave guide for the D9203-IS sensor
  • VS9203-IS sensor (Valve-Squeak sensor with built in waveguide)
  • Carrying case and carrying straps
  • Bluetooth USB Mini Adapter
  • VPAC II Rechargable battery pack
  • Battery charger with power adaptor and replaceable plugs
  • User manual & VPACwin™ software
  • USB License key