Optical level switches are measurement control devices that operate using optical sensors in order to use the light transmittance, reflective or refractive properties of the material being measured to determine its level. Optical level switches operate using either visible, infrared or laser light, depending on what type of light is best-suited for the intended application.
Able to measure the levels of clear, translucent, reflective and opaque materials, optical level switches can have either a contacting or non-contacting design. As a result of the wide-ranging capabilities of the optical level switch, the applications and industries in which it is utilized are numerous and include chemical processing, for material level control in aggressive and harsh environments; industrial manufacturing, for measurement purposes in many high temperature and high power processing applications; medical, for level sensing of materials requiring extremely precise measurements; and commercial, for diverse applications such as restaurants, fishing and satellite communications. Some examples of materials that optical level switches are commonly used to measure and control include sediments, liquids with suspending solids and aqueous, organic and corrosive liquids such as water or food items.
Optical Level Switch - AMETEK Drexelbrook