Safety Pattern Pressure Gauges
These gauges are generally used within the gas industry are are designed with operator safety in mind in case of a bourdon tube rupture and that no projectiles will blow out from the front of the gauge.
Safety pattern construction consists of a front baffle wall, perspex window and a blow out disc in the rear of the case. Dial sizes available are 100mm and 150mm with pressure ranges up to 700,000 kPa.

100mm and 150mm Diameter Data Sheet