The Paranologies TemperScope has two ambient probes that compare difference in temperature. The sensor shows blue light to indicate cold and the red light to indicate hot. The Temperscope shows changes in the ambient temperature and detects these changes that we cannot see with our eyes. Great to show temperature change on camera. Unit has a white light to locate in the dark. Uses 4 AA batteries.
As always it is up to the user to determine whether readings are showing intelligent patterns that can be suspected to be of paranormal nature. Always keep in mind that meters read the environment so there could always be a natural explanation to a reading. This has to always be ruled out before concluding that any readings are of paranormal nature.