Should you specify a sensor or a switch? Switches usually produce a binary result, as in off or on. A sensor produces a variable signal over some measurement range. This is referred to refer to as “point” versus “continuous” sensing. Switches understand the point of on or off, and sensor provide continuous measurement of a process or instance. Sensors are arranged by what is being sensed: pressure, temperature, proximity, etc. There are sensors for detecting metal, and sensors for detecting plastic, detecting stainless steel, and other materials.
One of the leading manufacturers of industrial sensors is Omron. Here are some of the more basic and common industrial sensor categories.
Motion Sensors can sense the movement or stoppage of parts, people, etc. and supply signals to the inputs of control or display devices. Typical applications of motion detection are detecting the stalling of conveyors or the seizing of bearings..
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Ultrasonic Sensors use sound waves rather than light to detect objects in harsh environments.Motion Sensors can sense the movement or stoppage of parts, people, etc. and supply signals to the inputs of control or display devices. Typical applications of motion detection are detecting the stalling of conveyors or the seizing of bearings.
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Proximity Sensors detect objects without physical contact, making them ideal for industrial automation.Motion Sensors can sense the movement or stoppage of parts, people, etc. and supply signals to the inputs of control or display devices. Typical applications of motion detection are detecting the stalling of conveyors or the seizing of bearings.
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Photoelectric Sensors can be used to detect virtually any object, including glass, plastic, wood, and liquid. On a production line or conveyor, photoelectric sensors can detect items’ sizes to spot any errors or spot their absence. They can identify problems like misaligned caps on bottles. They are widely used in the food and pharmaceutical industries, and in packaging plants. Some photoelectric sensors are oil resistant and spatter resistant. And there are many small photoelectric sensors for particular applications.
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Measurement Sensors measure the dimensions of an object by converting changes in amount of light into electrical signals when the object interrupts a wide laser beam.
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Vision and Imaging Sensors/Detectors are electronic devices that detect the presence of objects or colors within their fields of view and convert this information into a visual image for display. Vision sensors typically rely on CCD, infrared, or ultraviolet cameras to produce images that can be interpreted by software systems to detect flaws, sense barcodes, etc.
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