Profile: MDI Industrial Sales Inc. is a distributor of pressure gauges and temperature instruments. We also offer bi-metal thermometers, thermo wells, needle valves and control valves. We focus on petrochemical, pulp & paper, hydraulic industries, HVAC and OEM. We provide accessories such as adjustable overload protection device, diaphragm & sanitary seals, finned gauge siphon for steam service and P/T plugs & accessories.