Pipeline inspection pig signaller Hi-T Magalert, Hi-T Ultralert

Introduced to complement our intrusive Hi-T Pigalert™ models, we also offer a range of innovative non-intrusive pig signallers for both permanent and portable installations. The Hi-T Magalert and Hi-T Ultralert are robust non-intrusive pig signaller devices that use “magnetic” and “ultrasonic” detection principles respectively to detect, signal and log the passage of pigs at critical points along a pipeline. The Hi-T Magalert and Hi-T Ultralert devices can be used for both onshore and offshore installations. The Hi-T Magalert and Hi-T Ultralert are ATEX compliant and are housed inside fully certified aluminium or stainless steel explosion proof housing suitable for use in Zone 1, Zone 2, Group IIA, IIB and H2 Areas. The Hi-T Magalert and Hi-T Ultralert devices can log up to 100 events with time and date. All logged events can be viewed on a 70mm (2.7”) high visibility display incorporated in the main housing. Prior to clearing the history of logged events it is also possible to connect the device to a PC and download all stored data. Pig passages can also be signalled as they occur with ultra-bright LEDs which are incorporated into the main housing and are visible from up to 100m. Detection Principle Hi-T Magalert incorporates a magnetic sensor which detects changes in the magnetic field (Gauss level). Consequently, the Hi-T Magalert pig signaller device must be used in conjunction with pigs fitted with rare earth magnets (neodymium iron boron) around the pig body. Pig detection speed ranges from 0.1 to more than 10 m/s. Hi-T Ultralert uses a “passive” or “active” ultrasound sensor which listens to the acoustic activity from the outside wall of the pipeline.