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Pig Locators

The NPR series low-frequency receiver (locator) is a portable self-contained device. It is designed to detect and register signals from low-frequency transmitters installed on inline PIGs, as well as for recording weak changes in magnetic fields, created by inline PIGs without transmitters.

A low-frequency (22Hz) electromagnetic signal from the transmitter passes through a layer of soil or water, as well as through metal and reinforced concrete walls of pipelines, launch and reception chambers or tank walls.

By sound and light signals from the NPR receiver, the operator determines the position of the transmitter inside the pipeline.

NPR locators have high sensitivity and narrow bandwidth , which allows you to confidently detect the signal from the transmitters even under adverse conditions, such as industrial noise with a frequency of 50 Hz, running electric motors, deep burial of the pipeline.