Sovereign switches use a diaphragm sealed piston design, to allow operation on gases or liquids up to 100 MPa. The single-setpoint design provides a high degree of over-pressure protection, but the scope is more limited than the Classic range.

The Sovereign gauge pressure range costs of:
Model S21: Fixed deadband, set-points from 1,2 kPa up to 10 MPa.
Model S22: Narrow adjustable deadband version of S21.
Model S24: High Pressure version for setpoints to 70MPa, pressures to 100 MPa.