What is the difference between a pressure gauge and an oxygen pressure gauge?
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In what ranges are they used respectively?
Gauge ranges are a bit wider; for oxygen gauges, one type must be oil-free.
What about banning oil? Aren’t there also nitrogen pressure gauges and things like that? Why can’t an air pressure gauge be used instead?
Oxygen pressure gauges are oil-free, so ordinary pressure gauges cannot be used. Ammonia reacts with copper, which is why ordinary gauges are also not suitable
It’s simply divided into regular and oil-proof types; regular ones can be used as a temporary solution even after thorough degreasing
In addition to the prohibition of oil use for oxygen pressure gauges, the calibration of their pressure ranges also differs from that of ordinary pressure gauges; moreover, the materials used are different as well