Safe Load Indicator Systems for All Crane Types
A Safe Load Indicator (SLI) is an electronic monitoring and warning system fitted to cranes and lifting equipment. It continuously assesses real-time lifting conditions including load weight, boom angle, boom length, and working radius. It then alerts the operator before the crane approaches or exceeds its rated capacity. Because a crane’s safe lifting capacity changes constantly as geometry and operating conditions shift, an SLI eliminates the guesswork that leads to overload accidents. At Klug Avalon, we design and manufacture SLI systems for all major crane types, with application-specific configurations built around your crane’s actual capacity chart.
Safe Load Indicator For Pick and Carry Crane
Safe Load Indicator For Telescopic Crane
Safe Load Indicator For Lattice-Boom Crane
Safe Load Indicator For Tower Crane
Safe Load Indicator For Gantry Crane
Safe Load Indicator For Lorry-Loader Crane
Safe Load Indicator For Articulated-Boom Crane
Safe Load Indicator For Factory Forklift
Safe Load Indicator For Aerial Work Platform
Safe Load Indicator For Pipelayer Crane
Safe Load Indicator For EOT Crane
Safe Load Indicator For Reach-Stacker Crane
Safe Load Indicator For Deck Crane
Safe Load Indicator For Level-Luffing Crane
Safe Load Indicator For Mooring Winch
Why Choose Klug Avalon Safe Load Indicators?
Since 2000, Klug Avalon has been among the leading safe load indicator manufacturers trusted by OEMs, government bodies, and crane operators worldwide. With 38,000+ systems installed globally, our automatic safe load indicator solutions are proven to deliver reliability, precision, and long-term value.
- 25 years of design and manufacturing experience
- 100% in-house production and testing
- Compatibility with new and existing cranes
- Global installations & trusted OEM partnerships
Built Tough for Demanding Site Conditions
Every SLI system is designed to perform reliably in the toughest industrial environments. Our solutions withstand extreme heat, dust, vibration, and rain, making them ideal for construction, mining, shipyards, and heavy lifting operations.
- IP-rated enclosures for weather resistance
- Vibration-proof connectors
- High-contrast operator display for all lighting conditions
Precision Testing & Quality Assurance
Before reaching your site, every system undergoes rigorous testing at our in-house quality lab:
- Automated Environmental Stress Screening (ESS)
- Rain-chamber and temperature cycling tests
- Vibration and endurance calibration
This ensures each system delivers long-lasting accuracy and compliance with international crane safety standards.
Automatic Safe Load Indicator Systems for Cranes
Our safety systems for cranes use advanced sensors and control modules to continuously monitor your crane’s load, angle, and working radius.
Real-time alerts help operators avoid unsafe conditions and stay within rated capacity – improving both safety and productivity.
Key benefits of using a safe load indicator with your cranes:
- Real-time display of load, boom angle & radius
- Overload alerts
- Data logging for compliance & safety audits
- Seamless integration with hydraulic, mobile, and tower cranes
A Sense of Satisfaction
Satisfied customers are our best spokespersons
Have Questions About Our Safe Load Indicator Systems?
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.
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.
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.
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.
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. Klug Avalon SLI systems can be designed for existing and older cranes by matching system configuration with crane capacity charts and operating requirements.
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
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.