A wide bore glass tube is mounted vertically in front of a scale graduated 0 to 60cm.

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 0 to 50 lbs. In² & 3.5 Kg/cm² actual pressure.

A valve is fitted to the air inlet tube from the pump. As the pressure in the oil chamber is increased, oil in its actual (total) pressure is directly indicated. The tube is of extra strong glass and plastic safety screen is secured is fitted on front.

Overall height of apparatus 690mm approx.

A wide bore glass tube is mounted vertically in front of a scale graduated 0 to 60cm.

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 0 to 50 lbs. In² & 3.5 Kg/cm² actual pressure.

A valve is fitted to the air inlet tube from the pump. As the pressure in the oil chamber is increased, oil in its actual (total) pressure is directly indicated. The tube is of extra strong glass and plastic safety screen is secured is fitted on front.

Overall height of apparatus 690mm approx.