Electro-optical level switch SD series

for liquidsfor the pharmaceutical industryautomotive

The optical liquid level switch uses the principle of total reflection in a prism. Reflection or penetration, is the basis of the level alarm output. When the sensor is surrounded by air, the angle of incidence is greater than the critical angle and thus total reflection occurs. Tota ly reflected light will be transmitted to the receiver. Conversely, when the sensor is surrounded by liquid, due to the refractive index of the liquid and the sensor tip material, almost all light will penetrate the front of the sensor. Using this principle, the optical liquid level switch design is based on light. The receiver can detect and determine a light reflected or penetrated state, and determines the circuit output. The SD Series optical level switch uses the principle of light reflection in a prism to sense the absence or presence of a liquid at the point where the sensor is installed in a tank, pipeline or other type of container. Description SDX Optical Level Switch, Lquid Level Switch SD series is an optical level switch line that emit a beam of infrared light into the tip (prism) of the sensor. In the absence of the liquid at the sensor tip the light is reflected back to the sensor’s receiver. When the target liquid is present surrounding the sensor tip, the light is refracted into the liquid and away from the SD series level switch receiving component thus how liquid presence and absence is determined. The SD series output will be activated accordingly. These optical level switch devices are compact, cost-effective and ideal for a wide variety of fluids. Features 。Simple and compact with no moving parts 。LED indication 。10-28VDC, 115VAC or 230VAC powered versions