Related collection: Rugged Phones
The best answer: Rugged phone. The rugged phones come with MIL-STD military grade certified, IP68 & IP69K IP rating, and special design, have undergone stringent tests to ensure they meet military standards and can thus withstand extreme temperatures, shocks and more.
But not each rugged phone has a thermal camera, in other words, only some rugged phones equipped with thermal camera. Different with the thermal imager accessory, the thermal camera was integrated into the rugged phone, it is one of the cameras of a rugged phone. Therefore, it is very conveniently to use, and portable also.