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Hydrostatic pressure level sensors are submersible or externally mounted pressure sensors suitable for measuring the level of corrosive liquids in deep tanks or water in reservoirs. Typically, fluid level is determined by the pressure at the bottom of the fluid containment (tank or reservoir); the pressure at the bottom, adjusted for the ...
A float switch is a type of level sensor, a device used to detect the level of liquid within a tank. The switch may be used to control a pump, as an indicator, an alarm, or to control other devices. One type of float switch uses a mercury switch inside a hinged float.
Telemetry is used to communicate the variable measurements of flow and tank level sensors detecting fluid movements and/or volumes by pneumatic, hydrostatic, or differential pressure; tank-confined ultrasonic, radar or Doppler effect echoes; or mechanical or magnetic sensors. [26] [27] [28
Compared to a scalar pressure sensor, such as a hydrophone, which measures the scalar acoustic field component, a vector sensor measures the vector field components such as acoustic particle velocities. Vector sensors can be categorized into inertial and gradient sensors. [9] Vector sensors have been widely researched over the past few decades.
This sensor is used as an air gap (bridge clearance) sensor in NOAA's PORTS system. Another example is the WaveRadar REX, which is a derivative of a Rosemount tank radar. Digitized sea clutter image. From data on the elevation of the surface of the water at three or more locations, a directional spectrum of wave height can be computed.
Subsea radio communication is generally limited to under 50 meters (160 feet) through seawater. [12] Subsea radio waves are unaffected by turbidity, salinity and pressure gradients [12] and also has a notable difference between acoustic and optical technologies, in that radio waves can pass through the water-air and water-seabed boundaries ...
An AIS-equipped system on board a ship presents the bearing and distance of nearby vessels in a radar-like display format. A graphical display of AIS data on board a ship. The automatic identification system (AIS) is an automatic tracking system that uses transceivers on ships and is used by vessel traffic services (VTS).
Marine electronics refers to electronics devices designed and classed for use in the marine environment on board ships and yachts where even a small amount of salt water can destroy some electronics devices. Therefore, the majority of these types of devices are either water resistant or waterproof.