Leitenberger, Germany offers diaphragm and Bourdon Tube type pressure switches:

• up to 2 switch contacts
• robust design
  
• vacuum, low pressure, high pressure up to 600 bar
• threaded or flanged
• fixed or adjustable hysteresis

more information on pressure switch models

Calibration Software for the mobile pressure calibrator LR-Cal LPC300 for online calibration, setting procedures and certification