Civil inspection and monitoring systems , from drones to crawler robots to sensors for infrastructure and plants, often require custom technical components not available off the shelf. Industrial 3D printing makes it possible to produce them quickly, even in series, with materials suited to requirements such as lightness, vibration resistance, electrical insulation and flame-retardant behaviour. This guide describes use scenarios, typical components and the right materials for those who design and produce inspection systems for energy, infrastructure and construction.