Feature --Liquid-sealed register (LXH), vacuum sealed (LXHG) easy and long term clear reading. --Piston adopts high quality material to ensure stable and durable performance; --High quality materials corrosion resistance --Plastic connector nut --Data Output Options: 10 L/Pulse, 100 L/Pulse, or 1000 L/Pulse for LXHG; 1 L/Pulse for LXH.Volumetric Water Meter factory website:http://www.hangyuanmeter.com/water-meter/volumetric-water-meter/