... EN1359-1998 standard requirement G1.6, G2.5 aluminium case gas meter is suitable for measuring the flow ... many advantages as follows: beautiful appearance, aluminium alloy case with special surface technique, with anti-reverse device ... long economic life.Main technical parametersG1.6, G2.5 aluminium case gas meter1. Meter body: aluminium alloy.2. ... = 0,1 Qmax = 3% G1.6,G2.5 Aluminium Case Gas Meter