Pressure, vacuum, and vibration switches monitor conditions in industrial systems and equipment to prevent damage and downtime. Air and water pressure switches monitor pressure levels in pneumatic and hydraulic systems to prevent overpressure. Miniature water and air pressure switches monitor pressure levels in small spaces and equipment. Diaphragm pressure and vacuum switches precisely monitor negative and positive pressure levels and use mechanical components to change the switch's state. Digital pressure and vacuum switches have electronic sensors that precisely monitor negative and positive pressure levels in digital systems. Industrial machine tool pressure switches monitor pressure levels in machine tools and equipment. Pressure switch and transducer combinations combine the functionality of pressure switches and transducers into one device. Replacement valves and accessories for pressure switches repair, maintain, or enhance the capabilities of pressure switches. Vibration sensors detect excessive vibration in machines.