W.E. Anderson, OLS-12, Series OLS Optical Level Switch, PFA Wetted Materials
Low Cost, Compact, LED Indication, No Moving Parts
Low cost, rugged optical level switch provides rapid response while employing no moving parts for stable process control. The bright red and green LED's indicate the presence or absence of liquid for true, local indication. Compact switch can be quickly mounted horizontally or vertically for each installation.
Principles of Operation The optical level switch employs an LED, which transmits infrared light. This light is sent through a prism and reflected back to a photo-transistor utilizing two 90° light reflections. With the prism surrounded by a gas, the light source is cast back to the photo-transistor. When a translucent liquid is introduced to the prism at or above the point where the light source makes contact with the prism, the light is reflected into the liquid, not allowing the photo-transistor to energize.
Product Applications
- Food and beverage systems
- Liquid holding tanks
- Hydraulic reservoirs
- Sumps
- Pharmaceutical systems
- Air conditioning systems
Features
- Compact switch can be quickly mounted horizontally or vertically for each installation
- Bright red and green LED's indicate the presence or absence of liquid for true, local indication
- Provides rapid response while employing no moving parts for stable process control
