Profile: Sigma Instruments Company offers a comprehensive range of liquid level gauging and control products. Our products include liquid level/flow indicators, liquid level gauge, liquid level switch/controller and instrumentation fittings. Our flat glass level gauges are the reliable means for accurate measurement and direct observation of process fluids. These gauges are designed to match industry requirements of ruggedness and material mix to widen the scope of application in process tank, pressure vessels & other containers with fluids varying form ordinary water to highly corrosive chemicals. Our float level switches are compact solutions to monitor low, intermediate and high level in tanks. This rugged, quick mounting & maintenance free design is an instant choice for tanks with high insertion depths or inaccessible top and bottom. A small pivoted float forms the only sensing probe that projects within the tank. Typical applications of these sensitive and accurate devices include strong tanks, high-pressure boilers, sterilizers & process tanks.