Profile: Whitman Controls Corp. manufactures miniature pressure, differential pressure, vacuum and liquid level switches. Pressure switches are industrial components that convert pressure changes into electrical functions. When a system's pressure increases above or decreases below a specific system set point pressure, the electrical state of the pressure switch changes, from on to off and/or off to on. They are widely used throughout many industries and applications including process machine industry, medical equipment industry, machine tool industry, marine engines and pumps & compressors. Liquid level switches are electromechanical devices that open or close an electrical circuit in response to a change in the level of a liquid in storage areas such as tanks, reservoirs, sumps and wells. They are widely used throughout many industries and applications that use liquid process systems such as drinking water systems and the oil and gas industry.