Dry Run Detection

Agricultural irrigation pump using Load Controls PMP-25 for motor load monitoring, dry-run protection, and efficient water management.

A pump running dry is one of the fastest routes to expensive equipment failure in any process plant. Without liquid to cool and lubricate the mechanical seal and impeller, damage begins quickly and by the time a conventional flow switch or pressure sensor responds, the pump may already be compromised.

Load Controls' power sensors detect dry running through the immediate and measurable drop in motor load that occurs when a pump loses its liquid. Because our sensors measure true power draw rather than downstream flow or pressure, they respond faster than hydraulic instruments, triggering automatic shutdown or alarm before seal damage, impeller wear, or overheating can occur. All sensors are non-invasive, install at the motor control panel with no contact with the process fluid, output standard 0–10V, 4–20mA, and Modbus signals, and are manufactured in the USA to ISO 9001:2015 standards.

How Load Controls is used in Dry Run Detection

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Traditional mechanical shear pins protect motors by breaking but every break means downtime, replacement parts, and manual labor. Discover how the Electronic Shear Pin, a digital load control that trips...

July 2, 2026|ayush ADID

Minimizing Costly Downtime: The Power of 50-Millisecond Fault Detection

In industrial environments, a delay of even a few seconds can mean a wrecked spindle or a snapped drive chain. Learn how 25–50 millisecond fault detection from Load Controls' PFR-1550,...

July 2, 2026|ayush ADID

Standard Power Sensors vs. VFD-Compatible Sensors: What's the Difference?

Standard power sensors and VFD-compatible sensors may look similar, but they handle motor load monitoring very differently. This guide breaks down the electrical principles, product options, and real-world applications that...

June 12, 2026|ayush ADID

Q: How does the sensor detect a dry running condition?

When a pump runs dry, it loses the hydraulic load of moving liquid causing a measurable drop in motor power draw. Our sensors detect this drop and trigger an alarm or shutdown.

Q: Will the sensor work on all pump types including magnetic drive and positive displacement pumps?

Yes. Load Controls dry run detection works on all electrically driven pump types because it monitors the motor, not the pump mechanics.

Products used in Dry Run Detection

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Q: Is dry run detection affected by normal variations in flow rate or system pressure?

No. Load Controls sensors are configured to detect the significant load drop associated with true dry running, not the minor variations caused by normal flow or pressure fluctuations.