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If you need to upgrade or improve your PLC systems, start by collecting detailed field notes of equipment, wiring, functions, etc.

There are two primary problems with ceramic crystal transducers used in blow detectors. The first is that they’re finely tuned devices (with a high Q factor) where the transmitter and receiver need to operate within in an exceptionally narrow frequency band.

Pre-engineered metal buildings are common features in industrial settings. In fact, they have become common features in many types of construction from utilitarian sheds to keep out the elements to multi-story architectural buildings for just about any use. This is the first part of an article looking at specifying metal buildings for industrial settings.

In 1973, Automation Industries Corporation (AIC, now Miloptic) developed blow detectors that used air-coupled ultrasonic nondestructive testing technology. Now, several of the systems – installed more than 30 years ago at panel and flooring facilities – are still up and running.