Essence offers Barksdale (Germany), Control Product range covers the complete field of mechanical and electronic pressure, temperature, level and flow monitoring and control for liquid and gaseous media. PRESSURE Mechanical Pressure Switches » Diaphragm Pressure Switches » Bourdon Tube Pressure Switches » Piston Pressure Switches » Compact Pressure Switches Pressure Transducer » Standard Version » Hydraulic Version » Intrinsically Safe Version » High Pressure Version Electronical Pressure Switches » Single Pressure Switches » Dual Pressure Switches » With 4 Relay Outputs LEVEL » Single Level Switches » Multi Level Switches » Tank Level Indicating Systems » Bypass Level Indicators FLOW Flow Switches » with optical display » without optical display Flow Sensors » with optical indication