A loop calibrator is one of the most essential tools in industrial instrumentation. Whether you work with PLCs, sensors, or process control systems, you will eventually deal with the standard 4–20 mA signal—and that’s exactly where this device becomes indispensable.
What Is a Loop Calibrator
A loop calibrator is a device used to measure, generate, and simulate 4–20 mA current signals, which are widely used in industrial automation.
In practical terms, it allows you to:
- test sensors (pressure, temperature, level),
- simulate signals during commissioning,
- calibrate PLC or controller inputs,
- troubleshoot signal loops.
The 4–20 mA standard is popular because it is resistant to noise and works reliably over long distances. A loop calibrator acts as a reference tool for verifying that everything in the loop is working correctly.
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