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1HLI - Height Limiter

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1HLI-largeSimple, accurate, cost effective height limiting system, suitable for self-installation. The 1HLI height limiter is designed to protect workers from overhead danger when operating in restricted conditions, it is often difficult for the operator to judge the actual height of the machine or the position of the booms from the cab. This can result in collision with roofs, walls, bridges and gantries or overhead wires, in many cases causing expensive damage to the machine, third party claims for structures or in the worst-case fatalities from electrocution.

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The machine operator is able to define a pre-set limit of the machines boom on the 1HLI operator station, preventing movement of the boom outside of the pre-set limit. This entry level height limiting system monitors the angle of a single boom and provides a motion cut signal output when the angle is exceeded.
The 1HLI consists of a gravity referenced angle sensor mounted on the lifting boom and a display at the operator station.

Sensing the height using a gravity referenced angle sensor rather than a sensor referenced against the machine body, ensures that height limits are maintained accurately even when the machine is tilted when working on an incline.

1HLI contains a relay operated output which changes state on height limit, this output will drive a hydraulic solenoid valve to provide hydraulic motion cut on the lift circuit, or may also drive an external alarm or beacon.
The 1HLI has been developed for use in the construction and utility maintenance industries for use on machines such as excavators, wheel and backhoe loaders, telehandlers and other articulated machines operating in restricted conditions.

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