Gauges are precision measurement devices used to measure magnitude, amount, or contents of something, typically with a visual display of such information.
Some of the most common gauges used today are as followed:
- Pressure gauge are instrument for measuring the condition of a fluid (liquid or gas) that is specified by the force that the fluid would exert, when at rest, on a unit area, such as pounds per square inch or newtons per square centimetre.
- A temperature gauge is a device used to indicate the temperature of an item being monitored. The display can be an analogue dial, an analogue range or a digital readout. Common methods of measuring temperature include bimetallic strip (the bending of which increases with temperature) and the thermocouple which produces an electronic voltage that depends on the temperature.