Rõhulüliti

Rõhulüliti, also known as a pressure switch, is an electrical device that detects and responds to changes in pressure. It is designed to open or close an electrical circuit when a certain pressure threshold is reached. This threshold can be either a maximum pressure, a minimum pressure, or a range between two pressures.

The operation of a rõhulüliti typically involves a diaphragm or piston that moves in response to pressure. This movement is mechanically linked to a set of electrical contacts. When the pressure reaches the set point, the diaphragm or piston moves, causing the contacts to either separate (open circuit) or come together (close circuit). Some rõhulülitid also incorporate a hysteresis, which is a small difference between the pressure at which the switch activates and the pressure at which it deactivates. This prevents rapid cycling or chattering of the contacts.

Rõhulülitid find widespread application in various industries and systems. They are commonly used in heating and cooling systems to control pumps and fans based on pressure differentials. In automotive applications, they can monitor oil pressure or tire pressure. Industrial machinery often employs rõhulülitid for safety mechanisms, such as shutting down equipment if fluid pressure becomes dangerously high or low. They are also integral components in water supply systems, refrigeration units, and pneumatic control systems. The materials used in the construction of a rõhulüliti, such as the housing and diaphragm, are chosen based on the specific media and environmental conditions they will encounter.