Abstract: The present invention relates to system for calibrating plurality of pressure transducers, said system comprising plurality of pressure transducers (13.1 to 13.n) mounted on a mounting means (12) which receives pressure input from a pressure source (11) via a hollow pipe (14) and distributes the pressure evenly to all the pressure transducers, said plurality of pressure transducers are mounted on the mounting means and placed inside a vessel (15) as to vary the temperature of the pressure transducers, said pressure source is also connected to a standard pressure transducer (17) whose temperature is maintained at the same level as that of pressure transducers (13.1 to 13.n).

Abstract: The present invention relates to a segmented cylindrical tide staff system [11] for erection at remote areas for dynamic calibration of electronic tide meters and computer models of tides, said tide staff system consisting of plurality of cylindrical tubes [12], said cylindrical tube being coupled to a flange [13] at its end through a circular orthogonal hole [20] drilled on a flat surface of the flange, said flange being provided with plurality of equally spaced slots [15] drilled on the flat surface of the flange, an outwardly protruding tide indicating arm [14] being mounted on the flange wherein said tide indicating arm consists of two mutually orthogonal planes [22] and [23], wherein plane [22] is perpendicular to the axis of the tide staff and plane [23] is parallel to the axis of the tide staff, said perpendicular plane [22] being provided with a mounting terminal [21] and a circular

Abstract: The present invention relates to a device useful as a controllable variable speed thruster-driven oceanographic profiler for coastal waters for measuring the vertical structure of chosen properties of the oceanic water column.

Abstract: The present invention relates to a segmented cylindrical tide staff system [11] for erection at remote areas for dynamic calibration of electronic tide meters and computer models of tides, said tide staff system consisting of plurality of cylindrical tubes [12], said cylindrical tube being coupled to a flange [13] at its end through a circular orthogonal hole [20] drilled on a flat surface of the flange, said flange being provided with plurality of equally spaced slots [15] drilled on the flat surface of the flange, an outwardly protruding tide indicating arm [14] being mounted on the flange wherein said tide indicating arm consists of two mutually orthogonal planes [22] and [23], wherein plane [22] is perpendicular to the axis of the tide staff and plane [23] is parallel to the axis of the tide staff, said perpendicular plane [22] being provided with a mounting terminal [21] and a circular

Abstract: The present invention relates to a system for calibrating plurality of pressure transducers, said system comprising plurality of pressure transducers (13.1 to 13.n) mounted on a mounting means (12) which receives pressure input from a pressure source (11) via a hollow cylinder (14) and distributes the pressure evenly to all the pressure transducers, said plurality of pressure transducers are mounted on the mounting means and placed inside a vessel (15) so as to vary the temperature of the pressure transducers, said pressure source is also connected to a standard pressure transducer (17) whose temperature is maintained at the same level as that of pressure transducers(13.1 to 13.n).

Abstract: The present invention relates to a device useful as a controllable variable speed thruster-driven oceanographic profiler for coastal waters for measuring the vertical structure of chosen properties of the oceanic water column.

Abstract: The present invention relates to a pressure housing for in-water pressure based systems and to a method for improving the life of the transducers and electronics of underwater systems by maintaining a humidity-free and clean environment around them by avoiding the entry of humidity, dust, or any suspended particles in the air during occasional data offloading and battery replacement in a humid and dust-laden field station; improving the ease of closing and opening of the pressure housing by the use of a novel arrangement thereby avoiding the use of conventionally employed cumbersome protruding and corrosion-prone locking devices such as screws, bolts, or clamps; and implementing reliable transmission of water pressure to the pressure port of the transducer, simultaneously minimizing the errors arising from dynamic pressure effects, preventing its chemical corrosion from saline water, and arresting bio-fouling in the vicinity of the pressure inlet.