The inclination sensor measures the inclination in the gravitational field by means of MEMS sensors (Micro-Electro-Mechanical-System) with subsequent digitisation and linearisation via controllers. It has a stable aluminium housing (optionally stainless steel) and is highly-resistant to vibration and shock. Casting measures in the housing lead to the achievement of protection class IP 69K. The NBT has a redundant MEMS sensor system, which is used to make a plausibility check inside the inclination sensor. Only one position date is output; the plausibility of this is checked using the second system's position date. Is the deviation of the two systems higher than a certain value, the sensor will enter the failsafe state.