The FLIR ONE Pro is a thermal imaging camera for iOS smartphones, specifically compatible with the iPhone 15 and newer models featuring a USB-C port. This device offers professional thermal imaging capabilities with a resolution of 320 x 240 pixels and utilises a native infrared resolution of 160 x 120 pixels. The thermal imaging camera attaches directly to the smartphone, transforming it into a powerful diagnostic tool for various applications such as building inspections, electrical maintenance, mechanical troubleshooting and energy efficiency assessments. It features FLIR MSX technology, which superimposes visible light details onto thermal images to provide greater clarity and context. The camera operates within a temperature range of -20°C to 400°C with a thermal sensitivity of less than 70 mK. It includes several colour palettes for different visualisation needs and offers both still image capture and video recording. The compact design measures approximately 72 mm in length, 34 mm in width and 14 mm in height, and weighs 35 g, making it highly portable for field use. The device is powered via the smartphone connection, eliminating the need for separate batteries. It comes with the FLIR ONE app, which offers intuitive controls, measurement tools and reporting functions. This thermal imaging solution is particularly valuable for professionals in construction, engineering, facilities management and industrial maintenance who require accurate thermal data acquisition and analysis. The camera’s robust construction ensures reliable performance in a variety of environmental conditions, whilst its precise thermal measurements support informed decision-making in technical applications. The successor to earlier FLIR ONE models represents a step forward in smartphone-based thermal imaging technology, with improved resolution and compatibility features.