How flat does the sample have to be?
The C-Therm Technology tests the properties of the material in contact with the sensor. If the tested material or object is not flat, the air in the cracks or buckles will be tested too. A good “rule of thumb” to use in evaluating whether your sample will test well: if you can take a nickel coin and balance it flatly on the surface of the sample with the full surface area of one side of the coin contacting the sample – then you your sample will test well with the TCi or ESP sensor. (A nickel is roughly the size of the active area of the sensor – 17mm diameter.