... J2.5H membrane is a volumetric gas meter diaphragm gas meter.It has a beautiful shape, small ... is the current international advanced one gas meter.HK-J2.5H household gas meter is the ideal phenotype, ... .2dm3 cyclic volume/flow2) Inside/outside of meter case is electro dusted, which insures nice appearance ... the models likeIC card gas meter, Intelligent meter, Remote control and Prepaid gas meter. G1.6, G2. ...