How ghost hunters turned weather meters into spectre detectors

Paranormal investigators use the devices to show presence of ghosts - or give their claims a gloss of plausibility

Ghost hunting has become a television sensation, with help from an unexpected accessory: the portable weather meter.

Years ago, weather stations were static installations, but these days all the necessary instrumentation can be packed into an electronic device no larger than a smartphone, providing a handy scientific device for meteorologists - and for spirit seekers.