Upgrade and experience the advantages of Gearless, Direct Drive Design. Proven outperformance on any application. Reliability reduces long-term cost of ownership. MADE IN USA using only USA PARTS. Perma-Cal has been a leader in quality and design of high performance pressure gauges since 1980. Reliable in the most rugged environments, Perma-Cal Gauges are designed to withstand hostile applications, including intense vibration, shock, pulsation and overpressure. For this reason, Perma-Cal gauges are well suited for the industrial, energy & power, commercial diving, oil & gas, and petrochemical industries. Design standards meet or exceed most industrial, aerospace & military specifications.