Regulator (Noun)

A control that maintains a steady speed in a machine (as by controlling the supply of fuel).

Nouns denoting man-made objects.

Any of various controls or devices for regulating or controlling fluid flow, pressure, temperature, etc..

Nouns denoting man-made objects.

The thermostat is a temperature regulator that keeps the room at a comfortable temperature.
The scuba diver checked the air regulator to ensure it was functioning properly before descending into the water.
The regulator on the water pump was clogged, causing the pressure to build up to a dangerous level.
The company installed a new regulator on the pipeline to control the flow of oil to the refinery.
The heating system's regulator failed, causing the boiler to overheat and shut down.