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We are manufacturer and exporter of boyles law pressure gauge India.Designed for demonstration, the column is clearly visible to the whole class without them having to crowd around the demonstration bench. A wide-bore glass tube is mounted vertically in front of a scale graduated 0 to 65cm³. Zero corresponds to the inside of the closed (top) end of the tube.
Air is confined in the tube by a coloured oil contained in a metal pressure chamber which is fitted with a Bourdon-type gauge calibrated.As the pressure in the oil chamber is increased using a pump (not included), oil is forced into the glass tube and the volume of the contained air and its actual (total) pressure are directly indicated.