Go to GlobalSpec.com Home
Alert   Product Alerts
Keep current on the latest products, new suppliers, and technical articles of interest to you. (See Topics)

Optical Level Switch Selection and Wiring Notes

From Madison Company
 

 

The optical liquid level sensors incorporate a phototransistor trigger, which provides a digital output that denotes the presence or absence of liquid. The mode of operation is derived from the principle of total internal reflection. An LED and phototransistor are housed within a plastic dome at the head of the device. When no liquid is present, light from the LED is internally reflected from the dome to the phototransistor.

Product Announcements
Madison Company - Optical Liquid Level Switches
Madison Company Optical single-point liquid level detection switches are best used in non-coating liquids. Highly reliable and compact, these switches output the presence or absence of liquid. The... (read more)
Omron Electronic Components LLC - Non-amplified Photomicrosensors
Infrared Sensing Technology... (read more)
Honeywell Sensing and Control - Liquid Level Sensors
The Liquid Level Sensors Family (LL & LLN Series) incorporates the principle of total internal reflection to create a fast, reliable, cost effective solid state sensor. (read more)
NET USA, Inc. - Versatile Illumination Concepts
NET New Electronic Technology presents LED illumination for machine vision from V.S: Technology... (read more)
Endress+Hauser, Inc. - Liquids Level Switch liquiphant® T FTL 260
Vibration limit switch for liquids, maintenance-free alternative to float switches. The Liquiphant T is a compact level switch that is ideal in places where access is difficult or space is limited. (read more)
Fiberoptics Technology, Inc. - Domed Ring Light - Vision
This domed ring light is specifically designed for the vision market. The ring's output is bounced off the dome's interior, creating a diffused, even lighting effect. The white background of the dome... (read more)
Topics of Interest
Without sensors, a robot is just a machine. Robots need sensors to deduce what is happening in their world and to be able to react to changing situations. This section introduces a variety of robotic... (Read More)
Absorption: The portion of optical attenuation in an optical fiber resulting from the conversion of optical power to heat; caused by impurities such as hydroxyl ions in the fiber. A/B Switch: A... (Read More)
The broad subject of machine vision has many levels of complexity. The simplest is the use of a single photosensitive detector to locate the boundary of a brightness change, so that, for example, a... (Read More)
Silicon photodiodes are semiconductor devices responsive to high-energy particles and photons. Photodiodes operate by absorption of photons or charged particles and generate a flow of current in an... (Read More)
4.1.   CHOLESTERIC LIQUID CRYSTALS The physical properties of cholesteric liquid crystals are in almost all aspects similar to nematics, except that the director axis assumes a helical form... (Read More)