what does a standard thread gauge measure
Measure it, or have a gunsmith measure it, with a choke gauge.
A round gauge with a needle to point at the measure.
It is a measuring gauge use to measure length and with
to measure pressure
A bourdon gauge is a type of aneroid gauge. It is used to measure pressure.
A Bourdon Tube or a Bellows gauge
The compound gauge is an instrument to measure pressures, positive or negative.
The current altitude of where you are.
to measure pressure
pirani guage can measure upto 10^-3 torr pressure but penning guage can measure beyond this
Bourdon's tube pressure gauge cannot be used to measure negative pressure. This is because absolute pressure must be measured and the Bourdon gauge only indicates the gauge pressure.