・Cleaner Bourdon tube ：The inside of the Bourdon tube is made cleaner, thanks to a special cleaning method.
・Low oxidation：A newly developed welding technique has reduced oxides deposited on the welds.
・High strength：Major components, such as the wet part, gas-contacting part, inner mechanism and case, are made of stainless steel to increase the gauge durability.
・High airtightness：Both G1 and G2 have passed helium leak tests, proving 1 x 10－8 Acc/sec. or under and 1 x 10－6 Acc/sec. or under, respectively.
・Clean-room processing：Both G1 and G2 gauges are cleansed, assembled, inspected and packed in a clean room.
・Oil and water prohibition：All these gauges are made as oil- and water-prohibitive products.
・VCR circular joint：Equipping
with a vinyl chloride resin circular joint is the standard specification
of G1. G2 is made to order.