Perma-Cal® Industries, Inc. has been a leader in quality and design of direct drive (helically-wound Bourdon tube) pressure gauges since 1980. Reliable in any environment, Perma-Cal® industrial, pneumo depth, caisson and specialty gauges are designed to withstand hostile applications, including intense vibration, shock, pulsation and overpressure. For this reason, Perma-Cal® pressure gauges are well suited for the industrial, energy & power, defense, oil & gas, aerospace, commercial diving and petrochemical industries. Design standards also meet or exceed most industrial, aerospace & military specifications.