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Angle Sensors: A Basic Guide

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Angle Sensors: A Basic Guide

Image: Positek.com

An angle sensor, which is also called a rotary sensor, is a device that measures position, angle, and rate of turn. It is used in a broad range of commercial and industrial functions. It figures the orientation of a material with respect to a predetermined reference position, as shown by the measure of turn required to shift from one orientation to another. An angle sensor can either be a relative or displacement sensor or a fixed position sensor. It can also be multi-axis or linear. To know more about the types of angle sensors and how to choose the right one, here is a guide on the basics of these devices.

Common Types of Angle Sensors

There is a wide range of angular position sensors. Some suppliers stock the most well-known types classified by output composition, supply voltage, detecting range, working temperature measurements, supply current, and packaging. The most common supply voltage values are from 4.5 to 5.5 V. There are also sensors with a supply voltage of 36 V. The supply current of most usual chips is 13.5 mA. A potentiometer is perhaps the most common type of sensor. A potentiometer works well in many environments. However, a potentiometer is vulnerable to sand or dust. This device is lightweight, designed for accuracy, and compact. An optical sensor on the other hand also works well in controlled environments. It has high resolution and is a precise sensor if installed properly. Just like a potentiometer, an optical sensor is susceptible to shock and areas with hazardous temperature. It may also malfunction with no warning. Magnetic sensors can withstand foreign matter such as sand or dust. They are robust and efficient, although can also fail when in extreme temperature. A capacitive position sensor is a device that builds up an electric charge that usually has two conductive chips connected by an insulator. It is sensitive to foreign particles but is solid and only requires low power.

Choosing the Correct Angle Sensor

When you are searching for the best angle sensor, you must consider the supply current and output type, whether it is analogue or digital. The key to choosing an appropriate angle sensor is to be concise about its function, measurement type, scale, geometry, resolution, and linearity. When talking about linearity, it is the maximum tolerable digression from a precise reading. In short, pick a sensor that is low-cost but fits its function accurately. Also, pick a sensor depending on its repeatability—the measurement’s steadiness when it comes to returning to the first point.

A sensor, which is also known as a transmitter, detector, encoder, or a transducer serves the same intents and purposes, whichever name you call it. Sensors are ideal for use in different applications, be it in automotive or submersible equipment.

 

 



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