The Heavy Duty pressure gauges with glycerine filling are used at measuring points with high dynamic alternating loads and strong vibrations and pulses. The glycerine filling ensures smooth pointer movement and thus good readability even in extreme load and strong vibration conditions. The lubricating effect of the glycerine also provides protection against increased wear. The modern modular construction system with an o-ring sealing system, tried and tested for many years, ensures a high level of functional safety and a long service life.