<p>A thick film heating element 12 comprising a substrate 21 with a heating track 23 and temperature sensing track 30 formed thereon. The temperature sensing track 30 has one or more first and second sections made of first and second materials with high and low resistivity respectively. In one embodiment, the heating track 23 comprises at least a pair of parallel heating sections connected at one end with the temperature sensing track 30 extending between the parallel sections and comprising parallel sensor sections. In a further embodiment, the heating track 23 and temperature sensing track 30 are formed of the same thick film material. There is also an independent claim for a thick film heating element comprising a substrate with a thick film heating track and a steam sensor formed thereon.</p>
