The simple, but effective design relies upon a patented non-intrusive antenna that ensures that the unit is not triggered by nearby magnetic noise or interference.
The easily portable robust units weigh 16kg and can be simply deployed by diver or ROV alike. Potential galvanic corrosion is prevented by fitting composite isolation pads between the protection cage and the pipeline. Once installed topside signalling is achieved by a battery powered acoustic pinger which can signal pig passage to the support vessel through the receiving acoustic transducer. This means that the reliable system is fully independent and can be operated from any vessel. By default the unit also continues to indicate pig passage for 36 hours following passage.
Standard or purpose designed pigs can be simply fitted with small high powered magnets or alternatively with an electro-magnetic transmitter depending upon client requirements.
Powered by 2 D-cell lithium batteries, the units are designed to be fully self-sufficient for a period of 5 years before the batteries require replacing. The common sense approach means that battery replacement is achieved by simply unscrewing the face of the unit, taking the old ones out and replacing with new ones.
Systems are available for short or long term hire or sale.