https://www.leybold.com/en-ie/products/vacuum-measurement-and-control/precision-vacuum-gauging/ceravac-ctr
CERAVAC CTR - Capacitance Manometer - Leybold Ireland
The working principle is based on the fact that semi-conducting materials exhibit a change in resistivity when under mechanical load.
ceravac ctrcapacitancemanometerleyboldireland