... light weight, flow range, measurement accuracy, high sensitivity, safety and reliability, long service life, is the current international advanced one ... which insures nice appearance, moisture-proof, gas corrosion-resistant and high impact-resistant.3) Sealing is good with rubber diaphragm ... the models likeIC card gas meter, Intelligent gas meter, Remote control and Prepaid gas meter. G1.6, G2.5, G4.0 ...