No. SLI systems vary on the crane type and requirements. Additionally, some systems provide basic warning functionality, while advanced systems can include capabilities such as remote monitoring, data logging, GPS tracking, geo-fencing, rugged components, and application-specific configuration.
FAQs
Yes. Klug Avalon SLI systems can be designed for existing and older cranes by matching system configuration with crane capacity charts and operating requirements.
A retrofit is carried out and certified on its own. It is kept separate from your crane’s original warranty. Klug Avalon gives you full documentation and compliance records for your retrofit. These are ready for any site inspection or audit.
installation, proper calibration, and configuration based on the crane manufacturer’s rated load chart. When professionally installed and maintained, an SLI provides accurate, reliable, and real-time lifting information that operators can confidently use for safe crane operations.
A load sensor measures the force applied by the lifted load and converts it into an electrical signal. The control unit processes this signal in real time to accurately calculate the crane’s lifting condition and support continuous load monitoring throughout the operation.
A Safe Load Indicator (SLI) continuously monitors critical lifting parameters, including load weight, boom angle, boom length, operating radius, and crane configuration. The system processes this information in real time and compares it with the crane manufacturer’s rated load chart. If the crane approaches or exceeds its safe operating limits, the SLI immediately provides visual and audible alerts, enabling operators to make informed and timely lifting decisions.
Installation timelines depend on crane type, application complexity, and site conditions.
Klug Avalon systems are designed to support efficient installation through organised cabling, application-specific configuration, and integrated system design.
Operator familiarisation and training generally take from a few hours to one working day depending on crane type, system functionality, and operator experience.
Operators should perform regular pre-operation checks to verify system startup, display response, and warning functionality.
More detailed inspections may be conducted periodically, while annual calibration and certification are recommended to maintain long-term operational accuracy and compliance.
The system should also be evaluated after major repairs, sensor replacement, or crane configuration changes.
Yes. Indian Standard IS 4573:2020 and BIS Scheme-X mandate the installation of safe load indicators on commercial cranes across construction, industrial, and port applications. Klug Avalon systems are designed to meet these requirements.
Yes, sometimes pre-fitted load moment indicators are not in working condition hence we recommend talking to our SLI expert and know the best suited solution for your crane. Book your consultant call now.
A typical Safe Load Indicator system includes:
- Load sensor (Load Cell, Load Pin or Load Clamp)
- Boom angle sensor
- Draw-wire (boom length) sensor
- Intelligent control unit
- Human Machine Interface (HMI)
- Visual and audible alarm system
Depending on operational requirements, the system can also be integrated with data logging, Bluetooth connectivity, IoT, GPS tracking, geofencing, wind speed monitoring, and cloud connectivity.
Klug Avalon manufactures SLI systems for all major crane types including pick and carry cranes, telescopic cranes, lattice boom cranes, tower cranes, gantry cranes, EOT cranes, lorry loader cranes, deck cranes, pipelayer cranes, and aerial work platforms, among others.
Depending on configuration, the system can log:
- Lifting history
- Operational parameters
- Event logs
- Error logs
- Usage information
Selected systems may also support cloud-based operational monitoring, analytics, and management-level reporting functionality.
%SWL represents the percentage of Safe Working Load currently being utilised during lifting operations.
For example, a reading of 80% indicates that the crane is operating at 80% of the permitted safe load for the selected lifting condition. This helps operators maintain better visibility of lifting capacity utilisation during operations.
Yes of course, as per your crane capacity chart we will make a custom safe load indicator system that matches your crane and its operation.
An automatic safe load indicator is a safety control unit mounted in the crane’s cabin to alert the operator if the lifted load is against the crane’s rated capacity. This system helps prevent accidents when working with cranes and material handling equipment.
A safe load indicator monitors whether the load on the hook exceeds the crane’s rated capacity at the current configuration. A load moment indicator goes further by calculating the load moment, the product of load and radius, and comparing it against the full rated capacity chart across all boom lengths and angles. Klug Avalon manufactures both SLI and LMI systems depending on the crane type and application requirement.
You can read more on our article about SLI vs LMI vs RCI – What is the real difference
A Safe Load Indicator operates through a continuous process of monitoring, processing, and alerting. High-precision sensors capture real-time lifting data, the control unit analyses it against the crane’s rated capacity, and the operator interface displays the crane’s lifting status while generating safety alerts whenever required.
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