Joseph Leslie Drager Mfg. Pvt. Ltd. Offers Thermal Imaging Camera with dual Transparent Color. Joseph Leslie Drager Mfg. Pvt. Ltd. Is an ISO 9001:2000 accredited company. The Thermal Imaging Camera with dual Transparent Color is used for locating the seat of fire with temperature measurement indicator and trapping victim location in smoky conditional by identifying potential back drop or flash over.