Level sensors are used to detect liquid or powder levels, or interfaces between liquids.

Temperature instruments use contact or noncontact methods to measure temperature.

Dynamometers are used in motor and engine testing.

Pressure relief valves are self-actuated safety valves designed to relieve excess pressure upstream from the line.

Jet pumps are typically used for drawing water up from a well.

Liquid level switches are used to detect specific liquid levels or interfaces between liquids.

Liquid level sensors are used to detect liquid levels or interfaces between liquids such as oil and water or liquids and solids.