Wasserstoff-Sensor

The description refers to a sensor for determining hydrogen concentration, having the following features: - at least two thermal transmission bodies are provided, each having two covering surfaces and no thermal connection to each other, - on the one part of the thermal transmission bodies a catalytic active layer is deposited on at least one covering surface for catalytic hydrogen conversion, - a temperature meter detects the temperature difference on the other covering surfaces of the thermal transmission bodies and provides an output signal which is a measure for the hydrogen concentration.