The Smart Interrupter (SI) is the latest product launch from pipeline specialist Radiodetection of the UK.

Designed for use by corrosion technicians when determining the effectiveness of cathodic protection (CP) on pipelines, this new solid-state interrupter enables the interruption of CP current, an essential part of coating evaluation.

"The SI was developed by Radiodetection and tested by some the world's leading gas companies," says a company spokesman. "However, it has applications wherever pipelines are protected by CP including the petrochemical and water industries."

Detailing its features, he continues: "The SI incorporates standard interrupter facilities and includes many significant advantages over other products. The unit features advanced power management, high current switching capability, user programmability, circuit protection and compact physical size. It has a high current capability and is available in both 50A and 100A versions.

"The SI is fully microprocessor controlled, can remember the last setting and store up to 10 configurations. Master/slave synchronisation comes as standard along with reverse polarity protection. A GPS (global positioning system) synchronisation option is also available. This means that the SI can be operated indefinitely without the need to resynchronise.

What makes the Radiodetection SI different is that the GPS is not hard wired but is on a flying lead so the antenna can be positioned to receive the GPS signal, according to the spokesman. ''Any number of remote interrupters can be synchronised quickly and easily and this GPS option allows 24-hour timer operation,'' he says.

"For pipeline location, the SI is fully compatible with Radiodetection's advanced Precision Pipeline Locator (PPL). This means operators can use the CP transformer as a signal source and accurately trace the pipe over long distances without a need for bulky transmitters and large battery packs.''

As always, Radiodetection has worked closely with users of this equipment and incorporated a number of features that enhance ease of use and operation. ''This is particularly important today as all companies look for more efficient working practices,'' the spokesman says. ''Its small size enables it to fit easily into cabinets and its unique design means that it is not orientation sensitive. Along with operators not having to worry about which way up to use the SI, the connection leads are also user replaceable, so spare leads can be easily fitted if the existing leads get trapped in cabinet doors or damaged in error.''

To further increase work efficiency, the SI has a remarkable 300-hour battery life from two D batteries or can run continuously direct from the CP supply with just a single wire connection, according to the company.

"In physical terms, the SI is also contained in a fully weatherproof housing. Calibration is not required, the only regular maintenance required is to replace the batteries periodically and check condition of the leads," he adds.