The sensor will pick up the rotation of a shaft. This shaft may be a direct coupling or a geared/linked shaft to a load hoist winch or a boom hoist winch to monitor Rope Speed and Direction. As a Slew Angle Sensor, the unit is directly coupled or geared/linked to a shaft which gives a slew ratio to monitor crane rotation about its axis.
The sensors can be provided as a traditional rotational encoder, absolute encoders or even as proximity sensors reading target discs.
All sensors may be supplied to suit standard marine environment or hazardous condition,
zone 1 (Class 1 Div 1).
| Sensor type | Protection | Operating temperature | Certification |
| Absolute Encoder, safe area | IP 65 | -20 to +60 degrees C | Safe Area |
| Absolute Encoder, zone 1 | IP 65 | -20 to +60 degrees C | II 2 G EEx d IIC T4 |
| Rotational Encoder, safe area | IP 66 | -40 to +75 degrees C | Safe Area |
| Rotational Encoder, zone 1 | IP 66 | -40 to +75 degrees C | II 2 G/D EEx d IIC T6 |
MIPEG Crane Safety and Monitoring Systems
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