Posted By Emyr Evans Has any one seen on the market a device that could trigger an alarm (audible or remote) if someone wearing a safety harness fell & became unconscious / incapable of self rescue. A device linked to the lanyard that indicates a sudden stop / activation would be ideal (possible with a relay to a partner / our rescue team) Alternatively a detector that would indicate someone is stationary for a short duration (lone working) - prior to the onset of suspension trauma.

Posted By steve e ashton There are many tasks which I would assess as being too high a risk to be done by a lone worker. Confined space entry is one, live electrical work another - and - work at height with a harness is another. It may just be my opinion - but if someone is required to work in a place that requires the wearing of fall arrest harness (because a fall is possible / likely), then I would automatically assess the risk as requiring control measures to include 'no lone working'. So an alarm of the type described would be unnecessary and may be obscuring the risk rather than reducing it. As stated this is my opinion only - I have nevcer seen it written in official guidance - I suspect because no-one would think it necessary to write such a basic rule down? Steve