leaks of halon, chlorofluorocarbon, hydrochlorofluorocarbon and hydrofluorocarbon refrigerants in concentrations as low as 10 parts per million can now be located with a hand-held, easy-to-use, portable leak detector from Lidbury, a uk-based company.

The portable detector, called Portamonitor, weighs 370 gm and has its sensor mounted on a 250 mm long flexible spiral metal probe to make access possible to confined spaces or awkward locations. The detector is operated with one hand, by means of an on / off switch, two-level sensitivity switch and a