Millennium Instruments Ltd. Manufactures Sealed Diaphragm Pressure Gauges. Millennium Instruments Ltd. Is an ISO 9001:2000 certified company that also offers products like Temperature Instruments, Flow Instruments, Level Instruments, Master Instruments, Digital Instruments etc.Sealed Diaphragm Pressure Gauges finds the most effective application of corrosive fluids such as area of Crude Petroleum, Paper Pulp, Fertilizers etc. The Sealed Diaphragm Pressure Gauges have an accuracy of 1.0% of full scale range. The Sealed Diaphragm Pressure Gauges have a Stainless Steel 304 case and Bayonet lock.