X Watch XW4 – Height & Slew Monitoring

Make: XWatch
Model: XW4
Restriction: Height & Slew Monitoring

The XWatch XW4 Excavator safety system can be configured to work on a variety of articulated hydraulic plant. Height and slew limitation is controlled using proportional soft-stop hydraulic valves providing accurate and repeatable performance without detriment to the machine.

Height Limitation

  • Operation is fail safe and fully automatic with function selection never more than two presses away.
  • All potential machine high points are monitored and appropriate motions controlled. Full power is always available to move away from a limit.
  • Motions are controlled with ramped slow down on approach and soft-stop. There is no machine ‘bounce’, overshoot, or undershoot. An optional chassis sensor can be installed to correct for terrain slope.

Slew Limitation

  • Single/dual parallel wall or angular limitation are available. When walls are in use, the front end equipment is also monitored and controlled for limit breach.
  • Limits can be either manually keyed in or set by positioning the machine. If both limits are active, the system will automatically flip to the appropriate display should a hazard approach occur. Set up is simple, quick, and can be protected with an optional access key switch. All settings are retained and will be active on start-up.


Options Include:

  • Access Key Switch (Prevents / allows setting changes)
  • Beacon (Height limit active indication)
  • Reeling Drum (Monitors telescopic arm extension, single proximity switch detection also available)
  • Offset Boom Sensor (Monitors chassis pitch and roll angles)
  • Platform Sensor (Monitors chassis pitch and roll angles)
  • Data Logger (CAN bus mounted event recorder with SD card)
  • 12VDC Valve Coils (No cost option for smaller machines)

IO Controller

Solid state, fully potted IP67, mounted in pump or engine bay. 4 x analogue inputs. 8 x digital inputs. 12 x output. All with full electrical protection and diagnostics, 2 x CAN bus. 11 – 30VDC. Manual key override for motion control valves. <10mS program cycle time for accurate response.


Solid state, IP65, RAM mount to window or dash. 4.3” or 2.8” backlit colour LCD. 7 x backlit, tactile keys. 1 x CAN bus. 11 – 30VDC.


Industry standard multi-core screened with M12 connectors.

Angle Sensors

Compact solid state 3 axis accelerometer with gyro compensation. Stainless steel, IP67. CAN J1939. Steel mounting bracket. Can be mounted anywhere on the front end equipment in any orientation. Direct drive performance. Up to three articulations can be monitored with the addition of chassis attitude.


Custom made super compact aluminium PWM proportional sandwich valve available in 2, 4, and 6 valve manifolds.

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