An air-gapped network is one that is physically isolated and is NOT connected to any other network. The only way data can be transferred into an air-gapped network is by physically inserting some sort of removable media, such as a USB or removable disk, or by connecting a transient device like a laptop.

...you could also say this about the PT170420 with background suppression, since the optical sensor has been part of the product range from ipf electronic since 1997 and was already considered a high-end device back then.

With requests for devices for the reliable detection of metallic objects, we usually recommend inductive sensors. And for good reason, as there is simply no more reliable and robust solution than this proven technology if the installation conditions apply to a specific application.

In Part 1 of my blog on VFD cable and motor life, I explained how using THHN cable or other non-specialized cable to connect VFDs to motors leads to premature motor failure and electronic noise that is wreaking havoc on process sensors and degrading safety on the plant floor. Specifying specialized VFD cable can help avoid these issues, but, unfortunately, there are no standards for VFD cable features and construction, so it is definitely a case of buyer beware. Here, in Part 2, we will discuss what to look for in VFD cable, so that you can make a more informed decision.

As small as a fiber optic head, but full of the finest technology – those are the small diffuse reflection sensors from the OTQ9 series.