This type of environmental chamber is made of a radial fan. It gives an efficient air circulation which lessens the temperature gradients. In order to have a precise temperature control, a digital controller is used.
The door of the device has a glazed window in order to view the test area, and scan the sample for strain measurements. Placed on the columns of the machine, the device is supported by a frame. The chamber can be rolled back and be cleared on the working place.