Proximity Sensors
Proximity sensors are discrete sensors that sense when an object has come near to the sensor face. They are able to detect the presence of nearby objects without any physical contact. A proximity sensor emits a beam of electromagnetic radiation and looks for changes in the field or return signal. Proximity sensors are commonly used on Smartphone’s to detect accidental touch screen taps when held to the ear during a call. Typical applications include the detection, position, inspection and counting on automated machines and manufacturing systems. There are four fundamental types of proximity sensors Inductive proximity sensor, Capacitive proximity sensor, Ultrasonic proximity sensor and the Photoelectric or Opto-electronic Sensors.
Inductive proximity sensors respond to ferrous and non - ferrous metal objects. They will also detect metal through a layer of non - metal material. Inductive proximity sensors consist of a coil wound around a soft iron core. The inductance of the sensor changes when a ferrous object is in its proximity. This change is converted to a voltage-triggered switch. Capacitive sensors respond to a change in the dielectric medium surrounding the active face without necessarily making physical contact and can thus be tuned to sense almost any substance. Capacitive sensors can also sense a substance through a layer of glass, plastic or thin carton.
Photoelectric sensors offer non-contact sensing of almost any substance or object up to a range of 10 meters. It consists of a light source (usually an LED, light emitting diode, in either infrared or visible light spectrum) and a detector (photodiode). Ultrasonic sensor utilizes the reflection of high frequency (20 KHz) sound waves to detect parts or distances to the parts. Ultrasonic sensors are the best choice for transparent targets.
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Resources
Videos
Ask an Expert: Can a touch / proximity sensor be used to detect gestures?
Ultrasonic Proximity Sensor - An Introduction To Sensors - PyroEDU
Reliable detection for iron and aluminum with new OMRON E2EW Series metal face proximity sensors
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Manufacturer Part No | Newark Part No. | Manufacturer / Description | Availability | Price for: | Price | Quantity | |
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VL6180XV0NR/1
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46Y8576 |
Integrated Proximity Sensor, 100mm Sense Distance, 2.6V to 3V Supply, Optical LGA-12 STMICROELECTRONICS PROXIMITY MODULE, DIGITAL, LGA-12; Supply Voltage Min:2.6V; Supply Voltage Max:3V; Ambient Light Sensor Case Style:Optical LGA; No. of Pins:12Pins; Operating Temperature Min:-40°C; Operating Temperature Max:85°C RoHS Compliant: Yes
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368 deliver in 1-3 days from our US warehouse 13,856 deliver in 2-4 business days - UK Stock
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1+ $5.46 10+ $4.91 25+ $4.64 50+ $4.33 100+ $4.02 |
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SI1143-A11-GMR
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31Y4225 |
Proximity Sensor, QFN, 10, -40 C, 85 C, 1.71 V, 3.6 V RoHS Compliant: Yes SILICON LABS Proximity Sensor, QFN, 10, -40 C, 85 C, 1.71 V, 3.6 V RoHS Compliant: Yes
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Available for back order + Check Stock & Lead TimesDelivery in 2-4 business days More stock available week commencing 11/28/22 |
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1+ $4.79 |
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SI1102-A-GMR
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31Y4221 |
Proximity Sensor, Module, 8, -40 C, 85 C, 2.2 V, 5.25 V RoHS Compliant: Yes SILICON LABS Proximity Sensor, Module, 8, -40 C, 85 C, 2.2 V, 5.25 V RoHS Compliant: Yes
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7,596 in stock + Check Stock & Lead Times Delivery in 2-4 business days
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1+ $4.55 |
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SI1141-A11-GMR
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31Y4223 |
Proximity Sensor, QFN, 10, -40 C, 85 C, 1.71 V, 3.6 V RoHS Compliant: Yes SILICON LABS Proximity Sensor, QFN, 10, -40 C, 85 C, 1.71 V, 3.6 V RoHS Compliant: Yes
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2,400 in stock + Check Stock & Lead Times Delivery in 2-4 business days
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1+ $3.96 |
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