SWITCHES AND SENSOR SYSTEMS
The possible switches for control and position monitoring of hydraulic cylinders differ fundamentally in their physical mode of action, their construction, their robustness and their operational limits.
TYPICAL POSITION DETECTION SYSTEMS ARE:
- Inductive switches integrated into the cylinder up to 120 °C (248 °F) (standard 80 °C (176 °F))
- Inductive, externally mounted switches up to 120 °C (248 °F) (standard 80 °C (176 °F))
- Mechanical switches up to 180 °C (356 °F) (standard 80 °C (176 °F))
- Magnetic field sensors up to 130 °C (266 °F) (standard 80 °C (176 °F))
- Linear position transducers up to 75 °C (167 °F)
When selecting a hydraulic cylinder, it should be clarified at an early stage whether a sensor is needed. Subsequent installation of switches is not possible.
Electronic position switches have a certain voltage drop in „idle“. This means that it is not possible to operate an unlimited number of electronic switches in series from a single voltage source. In contrast, mechanical position switches have no voltage drop.