Two years ago we wrote about our first sensor-equipped pump stations. The installs have grown since then, and so has a clear answer to the question every operator asks: which measurements actually predict failure? Three of them, it turns out, catch nearly everything.
Motor current is the earliest warning
A healthy pump draws a stable current at a stable duty. A slow upward drift over weeks is wear or fouling long before it is failure. A sudden drop means lost prime or a broken suction. Current is the cheapest sensor in the station and the most diagnostic per euro spent.
Discharge pressure is the truth-teller
Current can look fine while output quietly degrades. Pressure at the discharge is what the system is actually producing. Trended weekly, it exposes the slow declines that nobody notices until a complaint call: clogged strainers, worn wear rings, a supply level falling through the dry season.
Runtime and start count finish the picture
Hours and cycles translate data into maintenance: real duty for service intervals, and a start count that exposes short-cycling the moment a pressure vessel loses its charge. Operators who only log these two numbers still catch most avoidable failures early.
The trap in remote monitoring is collecting everything and acting on nothing. Instrument the three, alert on thresholds rather than dashboards, and a pump station starts telling you it is unwell while the fix is still cheap.