Many other evaluations are possible, like monitoring of the pump wear and the assessment of the oil state. The continuous temperature tracking can prematurely indicate standstill due to overheating. Continuous filling level monitoring can detect external leakages and initiate appropriate measures. A test cycle for monitoring the preload pressure in the hydraulic accumulator can evaluate this information and point at the correct time to the refilling. Thus, a change in the differential pressure on the filter can be used to predict a specific time window for a required exchange. Some short examples give a first impression. However, the real know-how is to evaluate the recorded sensor data in appropriate algorithms. This data can then be forwarded to a higher-level system via a fieldbus. If these sensors are IO-Link-capable, the recorded data can be transferred and stored to an evaluation unit. In the 'Predictive Maintenance' concept, built-in sensors continuously monitor the system status.

a required exchange of the oil filter can be scheduled in a planned maintenance period. Today the essential functions are already pre-warned monitored by switches. Regular maintenance prevents unplanned failures and reduces downtime. Hydraulic power units are regarded as reliable subsystems within machine tools and manufacturing plants.

IO-Link-capable sensors can also be installed within the HAWE Hydraulik compact power units resulting in a particularly space-saving and intelligent solution for industrial applications.

Within the concept 'Predictive Maintenance', built-in sensors and the intelligent evaluation of the collected data monitor the state of the hydraulic system permanently during operation.

Pulsa sensors