Oasis Instruments Company manufactures Mercury Filled Temperature Gauges. Oasis Instruments Company also manufactures control for Indian Railways and Indian Defence. The Mercury Filled Temperature Gauges are used in ovens, furnaces, vessels, pulp and paper industries, chemical, petrochemicals, fertilizers and refineries, smelters and foundries. The Mercury Filled Temperature Gauges are made of a sensor bulb/spiral transmitting capillary and a special flat bourdon tube, which are pressure-filled with mercury. These Temperature Gauges are available in dial sizes of 100mm / 150mm / 200mm / 250mm. These Temperature Gauges have toughened / shatter proof glass window.