A device for exhaust-gas treatment includes at least one housing with an inner surface and at least one sensor foil disposed in the housing. The sensor foil is formed at least with a sensor element and a conductor element. The sensor foil is also provided with an edge up to which the conductor element extends and which bears against the inner surface of the housing. The housing also has an opening for contacting of the conductor element. The opening is surrounded on the inner surface by an electrical insulating layer.