ESPIO is a technology startup with a focus on graphene sensors. We developed a nanosize graphene temperature sensor awarded the EU Seal of Excellence and 1st place at European PowerUp! Competition (EIC InnoEnergy). The sensor, spray-coated on a thin self-adhesive foil and flexible size, allows for large-area measurements, including curved surfaces. It provides for automated application instead of manual gluing, which increases measurement reliability while decreasing the costs.