In modern building services and control systems, you'll encounter two fundamental types of signals: analogue and digital. Understanding the difference between them is essential for anyone specifying, installing, or maintaining control equipment.   How They Work Digital signals are binary: 1 or 0, 24V or 0V. They're either "pump running" or "pump stopped" – no middle ground. Analogue signals vary; they represent a percentage. A pressure transducer might be reading 8 bar out o

If you've ever faced a situation where you've got single-phase power but need to run a three-phase motor—say, a pump in a remote water treatment site—you've likely looked at single-phase-in, three-phase-out inverters.

Controversial view - wastewater pumps should not be sized according to the required flow and pressure. In the world of pump sizing, lots of attention is paid to the required flow and pressure, or 'duty point'. The pump is then selected which can achieve this (plus maybe 10%), and as close as possible to the maximum efficiency point on the curve. But this is mostly about preventing pump cavitation, and when was the last time you had a wastewater pump fail due to cavitation?