Technology is advancing and it seems that it releases the latest products and innovations by the minute. One major technological success that we’re hearing as of late is the proximity sensors.
But, exactly what are they, how they work, and what they’re used for? Find out here in this article.
What are Proximity Sensors?
As their name suggests, proximity sensors are devices that detect objects nearby or up to their sensor’s vicinity without any physical contact. They convert information about the presence of an object into signals called ‘proximity sensors’.
Applications of Proximity Sensors
• Mobile devices
• Security
• Cars (e.g. parking sensors)
• Industrial sensing (e.g. object alignment)
• Ground proximity in aerocrafts, etc.
Types of Proximity Sensors
• Photoelectric Sensors
Also called ‘photo-eyes’, this sensor is triggered by the presence or absence of electromagnetic radiation—an infrared or visible light, for instance.
• Capacitive Proximity Sensors
Capacitive proximity sensors can detect both metallic and non-metallic elements, whether in solid, powder, granulate, or liquid form.
• Magnetic Sensors
As the name suggests, this sensor uses magnets as its sensing object. It’s regarded for its no electrical noise effect and ability to work on DC, AC, AC/DC, DC.
Other Types of Proximity Sensors
Aside from these primary options, there are many other types of proximity sensors. Some of which are the following.
• Inductive Sensors - Non-contact proximity sensor that detects ferrous targets, often steel thicker than 1mm.
• Retro-Reflective - Known to have the longest sensing distance, with some capable of monitoring at up to 10m range.
• Ultrasonic Sensors - Primarily used in many automated production processes—detecting clear glass and plastic, to name a few.
These sensors have been used in several devices including mobile phones, tablets, security appliances and more. They make these technologies more functional, sophisticated, and useful.
What are your thoughts about proximity sensors? Share your thoughts by leaving a comment.
