ColdTrailer MK. II Heat Probe, Cold Trailing SolutionsThe ColdTrailer is a conduction based heat sensing probe that allows firefighters to cold trail while remaining upright. Unlike infrared devices that sense the surface temperature of the ash, the ColdTrailer reaches deep into the ash and finds the heat where it is. Designed by experienced firefighters and tested and validated by interagency hotshot crews, the ColdTrailer is the only alternative to conventional bare handed cold trailing. California