Pressure Gauge

The following characteristics of the measured medium should be taken into account while selecting a pressure gauge:
Condition of the object being measured, such as a gas or liquid
temperature of the item being measured
Corrosiveness of the thing under measurement

These are a few varieties of pressure gauges: 
digital pressure sensor: features a digital display and transforms fluid pressure into an electrical signal.
Gauge of pressure for ammonia refrigerant: a dial pressure gauge for industrial chillers and refrigeration systems
Measurement of boiler pressure: a little dial or gauge that is often located on the boiler's front
Low pressure gauge: A vacuum gauge that detects low or nonexistent pressure in a vacuum
Brass measurement systems can be found in pressure gauges that are constructed from stainless steel. There are some that have a  liquid, while others are dry.