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Question:

The gas pressure reducer has two measuring ranges, one big and one small pressure gauges. What's the function of each? What's the meaning of a red line on some pressure gauges?

The gas pressure reducer has two measuring ranges, one big and one small pressure gauges. What's the function of each? What's the meaning of a red line on some pressure gauges?

Answer:

Large (high pressure gauge): displays pressure before decompression - cylinder pressure;Small (low pressure gauge): displays pressure after decompression - use pressure;
Large display inlet pressure, small display outlet pressureThe red line is generally two or a thick, this is the user's own painting, said the pointer is the normal status in this area, especially for the frequent adjustment of the place, as long as the watch will know to what extent the regulation
The big one refers to the bottle pressure, that is to say, the inlet pressureSmall refers to the pressure of the outlet after decompression

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