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Level gauge

Gauges are commonly used for indicating fill levels in liquid holding tanks. Liquid level gauges are frequently employed to monitor the level in a liquefied petroleum gas (LPG) tank or heating oil tanks. Liquefied petroleum gas is commonly used for purposes such as residential or industrial heating, or for powering internal combustion engines on industrial vehicles such as lift trucks (i.e, fork lifts). The LPG is typically stored as a liquid under pressure in a tank or cylinder. A liquid level gauge may be provided on the tank for measuring the level of the liquid in the tank. The auto industry has employed fuel gauge systems to measure fuel level in fuel tanks of motor vehicles. A basic fuel gauge system typically includes a fuel level sensor and a visual gauge to provide the driver the status of the fuel level in the car. The fuel gauge indicates the fuel level by receiving fuel level information from the fuel level sensor placed within the fuel tank of the motor vehicle. Generally known fluid level gauges are based upon mechanical measuring principles, for example, a float connected to a level indicator. Liquid level gauges of the type haying a buoyant float mounted on a pivoting float arm which responds to changes in the liquid level being measured are well known. Such pivoting float-type gauges typically utilize mechanical or electrical mechanisms that sense the angular position of the float arm with respect to a stationary support arm or other structure. Another known fluid level gauge has been based upon the well-known capacitance measurement principle. A capacitive level gauge consists of two means, for example, isolated metal tubes, placed vertically in the fluid in the tank or container, said means forming a capacitance. The fluid fills the space between the said means and serves as a dielectric. The dielectric between the said means influences the capacitance value of the gauge. Radar level gauges are in wide use for making non-contact measurements of the level of products such as process fluids and other materials. These devices utilize antennas to transmit electromagnetic waves toward the material being monitored and to receive electromagnetic waves which are reflected at the surface of the material being monitored. Level measurement devices using radar technique are used where special conditions make the use of other level measurement devices more or less insufficient. Such conditions may be the temperature in the container, the pressure in the container and the properties of the liquid.

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Level gauge product listings

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