Hydraulic Force and Pressure Gauges with Stainless Steel cases for corrosion resistance. The GF-Series gauge is calibrated with dual scale reading for pressure and force in bar and kN. The GP-Series gauges are calibrated with dual scale reading for pressure in bar and psi. The G-Series is glycerine filled and includes safety blow-out disk and pressure equalizing membrane. H-Series is ideal for use in many applications, specifically for high cycle and harsh environments.