Perma-Cal® Industries, Inc. has been a leader in quality and design of Direct Drive Pressure Gauges since 1980. Reliable in the most rugged environments, Perma-Cal gauges are designed to withstand hostile applications, including intense vibration, shock and over-pressure. For this reason, Perma-Cal gauges are well suited for Aerospace, Military, Marine, Petrochemical, Industrial and Commercial Diving applications.