Blog Archives

Sensors 101 – Control System Inputs

In today’s post I’m going to ask you to think of sensors in a different way. Most engineers who are specifying equipment think of sensors as discrete or analog devices, proxes or photoelectrics, flow or pressure sensors, thermocouples and the

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Posted in Automation Concepts, Sensing, Sensors

Sensor Resources

When I got up this morning, I had fully intended to write a post on sensors and sensing techniques. I was even going to title it “Sensors 101”, similar to the series that I started on PLCs several years ago.

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Posted in Sensing, Sensors, Vendors and Manufacturers, Website

Anatomy of a Photoeye

One of my first projects when I was in engineering school was to make a coin counter that would detect the size of various coins as they rolled down a ramp and total up the denominations. The circuitry was fairly

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Posted in Photoeyes, Sensors


Some basic info on photoeyes from the Primer: Photoelectric sensors or Photoeyes transmit and receive a light signal. The sensor changes state when the light changes from being received to not being received or vice-versa. There are two conditions for

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Posted in Photoeyes, Sensors

Precision Measurement Application

This station was used to measure a small crystal used in the manufacture of medical CT scanners. A Keyence laser scanner was used to measure the crystal in three different axes, providing both dimensional and “squareness” information to an operator.

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Posted in Applications, gauging, Laser, Sensors, Test Equipment

Choosing the Right Sensor

With all of the different types of sensors available and so many manufacturers and vendors competing for your business sometimes it can be difficult or confusing to choose the correct sensor for an application. In many cases such as detecting

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Posted in Proximity Switches, Sensing, Sensors, Vendors and Manufacturers
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