LG105 Draw-Wire Length Sensor (OEM Part Number: 205407)

Product Overview

The LG105 draw-wire length sensor is a heavy-duty linear displacement detection device purpose-built for mobile construction machinery. Carrying OEM part number 205407, it is manufactured by Xuzhou Hesiman Electronics Co., Ltd. under the GB/T2002-90 standard. This unit converts physical linear travel into standardized, transmissible electrical signals, acting as a core sensing component for length monitoring and position control on telescopic booms, lifting arms and extension mechanisms.

Operating Principle

Inside the rugged housing, a precision grooved drum is wound with a stainless steel measuring cable in a uniform, low-wear layout. The drum is coaxially mated with a high-accuracy rotary sensing element, and an integrated constant-force spring maintains consistent cable tension across the full stroke to eliminate slack and jitter. As the moving machine component pulls the cable out or allows it to retract, the drum rotates in direct proportion to the displacement. The sensing element outputs an electrical signal linearly matched to the travel distance, which the machine control system uses to calculate exact position, travel direction and operating speed.

Core Performance Advantages

• Jobsite-Rugged Construction: Sealed, shock-resistant enclosure design stands up to site dust, continuous vibration and wide ambient temperature swings, delivering dependable performance in long-term outdoor operation.

• Consistent, Repeatable Sensing: The even cable winding system and constant-tension retraction mechanism reduce uneven cable wear and measurement drift, preserving linear accuracy and repeatable positioning over the full measuring range.

• Straightforward Installation & Service: Compact form factor and flexible mounting points allow direct fitment to machine frames, boom sections or outrigger assemblies. No major modification is required for initial installation or replacement service.

• Wide System Interoperability: Works with standard construction machinery control architectures including load moment indicators and full-machine controllers, supporting seamless data integration and safety interlock logic.

Common Construction Machinery Applications

The LG105 draw-wire length sensor fulfills critical length and position sensing roles across all types of heavy equipment:

• Real-time telescopic boom length measurement on truck cranes and mobile cranes, supplying core data for load moment calculation

• Lift height sensing and end-of-travel limit control on aerial work platforms and scissor lifts

• Hydraulic outrigger extension monitoring to verify stable support configuration during equipment operation

• Work tool displacement detection and closed-loop attitude control on road building equipment including pavers and cold planers

• Cable payout and hook height monitoring on winch and hoist assemblies

Manufacturing Specification & Identification

Executive Standard: GB/T2002-90
Manufacturer: Xuzhou Hesiman Electronics Co., Ltd.
OEM Reference Part Number: 205407