Pressure gauges for monitoring pressure in several pieces of apparatus such as pressure vessels, pressure reactors & chromatography columns. Pressure ranges vary from 0-60psi and up to 0-400psi. Gauges have different NPT end fittings and internal materials, as well as various dial ranges. Some come with nylon adapters to match to Ace-Threads, NPT threads and 1/4-UNF threads. One style comes complete with a 3-way tubing connector for in-line connection. Code -52 is a compound gauge for both pressure and vacuum applications.