The temperature of our body is very important for our health. High body temperature is a reaction of the body to specific stimuli accompanying a disease. The body responds to these stimuli by increasing temperature, in order to support its defence mechanism against the disease. However, variations in temperature could also be from other causes, apart from those related to diseases. Accurate temperature metering is of extremely high medical importance. It allows the diagnosis of diseases at an early stage, while monitoring their progress and the effectiveness of the pharmaceutical treatment.