Liquid Level Switch
Liquid level switches monitor and adjust the level of fluid in a vessel or
container using a variety of technologies. These measurement technologies may
include sensors using differential pressure sensing, optical sensing, sonic
or radar, microwave, and pressure-sensing membranes. These switches and their
sensors can be finely tuned to measure extremely low liquid levels.
Liquid levels are measured by the activating or deactivating a reed switch,
relay, or a solid-state switch. When the switch's circuit is completed
or broken, the signal sent from the switch can be relayed to open or close
valves, operate pumps, and initiate other processes.
The switches may be constructed from a variety of materials including bronze,
plastic, PVC, stainless steel, and other materials. They may also be constructed
to withstand high temperatures and pressures, and PTFE switches are available
for use in high-purity applications.
Liquid level switches have a variety of applications including flow line monitoring,
household appliances such as heaters and furnaces, automotive, and control
technology.