Know the basics of open- and closed-circuit filtration designs. Factors to consider when specifying a return line filter system. Selecting the appropriate filtration system when designing a hydraulic ...

LONDON — In a video control room atop a City of London police station, Chief Inspector John Notton can punch up images from 47 cameras and view the glories of England on 39 television screens. Here, ...

Last month we left off describing video cabling and installation. This month we will continue covering installation, going a little deeper into cabling design. We will then examine the design ...

Figure 1. A closed-circuit cooler. Photos courtesy of Evapco. It’s a common question during the early design phase of large mechanical systems: Is open- or closed-loop cooling equipment better suited ...

I'm considering supplementing my standard security/alarm system with some cameras. However, I want to avoid the usual "IoT"-type systems with Bluetooth, phone apps, etc. I'd like a closed circuit ...

This article begins our coverage of a new series of correspondence courses from Iowa State University. These courses are designed to meet state license renewal requirements and provide valuable ...