The TMQ Sensor is a minimally invasive calorimetric flow sensor designed for oiling determination and thermal management in industrial and automotive applications. It supports oil supply measurements in gearboxes to aid the development of efficient lubrication concepts and enables monitoring of fluid velocities and temperatures, even in areas that are difficult to access. In coolant circuits, the sensor provides valuable data for the optimization of thermal management systems by measuring flow rate, temperature, detecting air pockets, and enabling detailed tracking of pump and valve operations.