MID-Certified Prepayment Wireless Remote Smart Reading Gas Meter

The middle part of the film is sandwiched by a metal sheet, which is a hard and inflexible "hard core", but the surrounding film is very soft, allowing the hard core to move left and right in the box. The membrane divides the space inside the box into two parts, each forming two "air chambers", namely, I, II, III, and IV. Each air chamber has an air vent through which air can be intake or exhaust. When the inlet of the left ventricle is filled with air and the outlet of the right ventricle is vented, the pressure of the gas acts on the membrane, causing the hard core to move to the right. On the other hand, if the right side enters and the left side exits, the hard core moves to the left. It can be seen that if you think of a box as a cylinder, and the membrane and hard core as pistons, isn't it the same as a steam engine?

From the outside of the gas meter, you can only see a scroll wheel with numbers inside the small glass window. There are also seven digits on the scroll wheel, with the first four digits of the decimal point being black and the last three digits being red. The fuel used for people's daily cooking has been transformed from conventional energy sources such as wood and coal, which are seriously wasted and polluted, into clean energy sources such as natural gas and gas, and even electricity. Here, the gas meter is about to play its role. Its automatic accumulation function allows those who use natural gas or pipeline gas to easily know how much gas is used, so that they can pay according to the cubic meters of gas consumed each month.