What is the coefficient of thermal expansion of Avongard Tell-Tales?
The coefficient of thermal expansion is 6.8 x 10-5 cm/cm per degree Centigrade. This is applicable for the range of temperatures between –40 degrees C to +80 degrees C. There are three factors that can affect the reading of the Tell-Tale due to temperature changes. The coefficient of thermal expansion, the change in temperature and the relationship between the dimension of the Tell-Tale and that of the building element being monitored. Because the dimensions of the Tell-Tale is small when compared with the building element the effect of thermal expansion and contraction of the Tell-Tale is usually insignificant. Avongard Tell-Tales have been used successfully throughout the world for many years, from the desert and tropical to the polar regions as well as the more temperate climates.
