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The company for the supply and support of state of the art instrumentation for use within Ballistics R&D and proof testing.

Internal Ballistics

Products designed for the study and analysis of the processes originally accelerating a projectile.

External Ballistics

Products designed for the study and analysis of the flight of a projectile through the air.

Terminal Ballistics

Products designed for the study and analysis of the interaction between a projectile or explosion and its intended target.


GP High Pressure Transducer Series HPI

HPI have worked together with expert partners with great experience in development and production of different types of transducers for various applications to find a pressure sensor series that could provide:

  • High accuracy
  • High reliability
  • High sensitivity
  • Wide measuring range
  • Small dimensions

The greatest challenge in developing a new transducer generation was to find a superior alternative to Quartz as piezoelectric material. The new technology found is Gallium Phosphate. This new material features essential advantages over Quartz in particular with regard to twice the sensitivity despite higher maximum pressure and improvement in thermal stability. The industrial grown process guarantees a stable quality of the material.

Image: GP Series Temp.

No influence of temperatures up to 200°C over the entire pressure range leads to a temperature coefficient of smaller than -0.01%/°C.

Compared to Quartz Gallium Phosphate has significant advantages. The most important ones are twice the sensitivity and the thermal stability of up to 970° C.

All transducers of the GP Series are front sealing types, having the same outer dimensions with M10 x 1mm thread and are compatible with existing NATO measuring bores. Charge amplifiers and standard cables for piezoelectric transducer measurements can be used.

Photo: GP Series.

The result is a family of three sensors with measuring ranges of up to 200, 600, and 800 MPa.

Image: GP Series Specifications.