Protecting Your Sensor’s Signal With The Right Cable

notre dame gargoyleUntil micro-scale wireless technology is perfected, the sensors we use for monitor and control systems will require cables for power and communication. And that means the performance of those systems is dependent on the cables we use.

So why can’t we use the same cables for everything? Why does cable type, or size, or length matter?

Those are valid questions, with important answers. Let’s explore them, shall we?

How To Use A Multimeter To Troubleshoot Your Sensor

use a multimeter to troubleshoot sensorsSo, you’re having problems with the signal from your sensor. Maybe it only works occasionally, maybe there’s too much noise to establish a strong connection, or maybe you just don’t know what is wrong. One easy way to figure out what’s wrong is using a multimeter to test your sensor. Don’t worry, we will walk you through how to use a multimeter to troubleshoot your sensor and get it working properly in no time!

But wait - what is a multimeter and how does it work? Let’s take a quick look. After all, we’ve got a sensor to troubleshoot.

How Magnetic Fields Work On A Liquid Level Switch

Magnetic liquid level switches rely on reed switches and magnetic fields to operateMany liquid level switches work with magnetic fields that are used to open and close switch points. It’s a clever, yet simple, type of sensor that has been a staple in level measurement for a long time now.

But how does it really work? How are magnetic fields harnessed as the working principle in many liquid level switches? We’ll explore how magnetic fields behave and how this behavior is controlled to operate a switch point....

4 Critical Tips For Eliminating Electrical Noise

Stop electromagnetic interference!Electrical noise, also known as electromagnetic interference, can destroy a clean signal from your measurement instrumentation (such as level sensors and pressure transducers). Protecting your sensors from electrical noise is a top priority. Luckily, this is a fairly simple task in most cases.

There are a couple of ways to keep electromagnetic interference (EMI) at bay. You need to use properly shielded cable, you must be careful when routing your cables, and your sensors need to be grounded properly. Finally, it’s important that the signal output is appropriate for the electrical environment.

Application Challenge: Avoiding Electromagnetic Interference

Cable shielding must be connected to ground to have any effect
Here, the cable shield is tied to the case ground by way of the connector. Cable shielding must be connected to ground to work.

Electromagnetic Interference, or EMI, can cause problems in even sophisticated industrial control system when not properly protected. Instrumentation, such as a level sensor or a pressure transducer, can perform erratically, inaccurately, or not at all when exposed to EMI.

Simply put, EMI in an industrial setting is electrical noise that disrupts electrical circuits in instrumentation. These disruptions can range from simple signal degradation to a total loss of sensor...