Features
These GPP Model Helium Calibrated Leak Standards have glass-permeation type leak elements and are the most common ones used to tune and calibrate helium mass spectrometer leak detectors, leak testing systems and vacuum systems. They are part of a family of Calibrators including the GPPT, GPC and CLP Models offered by VTI that cover leak rates from 10-12 up to 10-3 atm-cc/sec and larger. Those models are detailed in other brochures, and VTI's experts are always eager to help you select the best model - technically and cost - for your application. Without obligation, of course.
The GPP Accu-Flow™ Calibrated Leaks are based on the principle that helium flows through certain materials at a measurable rate depending on the material thickness, driving pressure and temperature. Depending on the leak rate required in the GPP Leaks, the permeation material is Pyrex or Quartz.
The GPP Leaks feature an all-welded stainless steel construction for reliability. Most leaks require a shut-off "isolation" valve to zero the leak signal during tuning and calibration. VTI offers the GPP Leaks both with and without a TeflonŽ-packed stainless steel shut-off valve. The inlet port of the brand of leak detector or vacuum system determines the termination of the leak. The most common termination of the GPP Leaks is a 1-1/8" diameter tube which mates directly to many Varian, Veeco and VIC leak detectors. All leaks are available with QF (NW, KF) and many other types of fittings.
All GPP Leaks are provided with certifications of the NIST-traceable calibrations performed in our A2LA-accredited Calibration Laboratory.
Why choose the GPP Calibrator ?
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