ISO 24445:2020 Crane Smart Sensor Spec Explained
ISO 24445:2020, "Crane Smart Sensors — Technical Specification," is a key technical standard in the crane industry. Developed by the International Organization for Standardization, it systematically defines the types, performance indicators, communication interfaces, reliability requirements, and calibration methods for smart sensors used in cranes.
The standard provides a unified technical basis for design personnel, inspection bodies, and end users. Kelude strictly adheres to its technical requirements throughout the product development and manufacturing process.
Scope and Application of the Standard
ISO 24445:2020 specifies the technical requirements and safety indicators for smart sensors used in lifting appliances, covering all cranes with a rated lifting capacity above 0.5 t. The standard applies not only to the design and manufacturing of new equipment but also provides clear technical guidance for the inspection, maintenance, and modification of cranes already in service. As a key component of the crane standard system, it aligns with the EN 13001 Crane Safety Standard series and ISO 4309 Wire Rope Inspection Standard, forming a complete framework of technical specifications. The defined technical parameters and safety factors give design personnel a clear design basis, while also providing quantifiable acceptance criteria for third-party inspection bodies conducting type tests and factory inspections.
Core Technical Parameter Framework
Under ISO 24445:2020, the design and manufacturing of crane smart sensors must satisfy a rigorous set of technical parameters. These parameters are established from extensive test data and safety engineering principles, covering the entire process from material selection to structural design. The safety factor ranges specified in the standard account for the fatigue life and limit load conditions of lifting appliances in severe operating environments. In engineering practice, design personnel must translate these requirements into concrete design parameters, ensuring that the load capacity of every component meets the required safety requirements.
Comparative Analysis of Key Technical Parameters
| Item | technical requirements | Description |
|---|---|---|
| Sensor Type | Lifting Capacity/Torque/Displacement/Wind Speed/Temperature | Per Monitoring Parameterselection |
| Measurement Accuracy | ≥µ1%FS(Critical)/±2%FS(General) | Non-linearity Error≤0.5%FS |
| Communication Interface | RS485(Modbus)/Ethernet(MQTT)/4G | Compatible with Common Industrial Protocols |
| Protection Rating (IP) | Sensor IP67/Junction box IP65 | Outdoor Waterproof Dustproof |
| Reliability | MTBF≥10000h/Service Life≥10Years | High Temperature Exposure Aging Test |
| Calibration Cycle | 12Months(Standard)/6Months(Important) | Re-calibrate After Replacement Calibration |
Inspection Requirements & Intervals
ISO 24445:2020 sets out clear requirements for Factory Acceptance Tests, Type Tests, and periodic inspections of smart sensors used on cranes. Factory Acceptance Tests must be carried out on every unit by the quality inspection department at the manufacturer's facility, and each unit that passes must be accompanied by a detailed inspection report and a certificate of conformity. Type Tests are required when a new product enters initial production, when manufacturing is transferred to another facility, or when significant structural changes are introduced. For cranes already in service, the periodic inspection interval is determined by the work duty and operating environment, and generally must not exceed 12 months. For heavy-duty cranes operating continuously at Work Duty levels A7 through A8, the inspection interval should be shortened to 6 months.
| Item | technical requirements | Description |
|---|---|---|
| Periodic Calibration | Standard Verification via Load Cell or Dynamometer | Annual+Replace if Error Exceeds Limitadjustment |
| Communication Check | Data Transmission Integrity | Monthly+Data Loss Rate≤0.1% |
| Dust Cleaning | Sensor Surface/Wiring | Quarterly+Wear Communication Check |
| Cable Communication Check | Damage/Aging/Contact | Monthly+Replace Immediately Upon Detection |
Safe Operation and Management Requirements
Under ISO 24445:2020, safe operation and routine management play a critical role in crane performance and workplace safety. The standard places strong emphasis on operator qualification and training, requiring that all operators complete specialized training and obtain the necessary certifications before operating equipment. User units must establish a comprehensive equipment file management system that documents the full lifecycle of the equipment—installation, usage, maintenance, and inspection. Any safety hazard identified must be addressed through the rectification procedure specified in the standard, ensuring the equipment remains safe and controllable at all times. Additionally, the standard imposes restrictive requirements on equipment usage under extreme operating conditions.
FAQ: Smart Sensor Requirements Under ISO 24445
Q: What accuracy is required for smart sensors under ISO 24445?
A: Sensors monitoring critical parameters must achieve an accuracy of ≥±1% FS, while those for general parameters require ≥±2% FS. Non-linearity error must not exceed 0.5% FS. Calibration is required every 12 months, with immediate adjustment if limits are exceeded.
Q: What are the technical requirements for communication interfaces?
A: The system must support RS485 (Modbus RTU) and Ethernet (MQTT/OPC UA). Data loss rate must not exceed 0.1%. Communication integrity checks are required on a monthly basis.
Q: What are the protection rating and reliability requirements?
A: Sensors must meet IP67 for waterproof and dustproof performance, while junction boxes require IP65. MTBF must be ≥10,000 hours, with a design life of at least 10 years. These requirements are validated through fatigue testing.
Q: How are smart sensors applied in crane operations?
A: Smart sensors provide real-time monitoring of lifting capacity, working radius, wind speed, and structural stress. Data is transmitted to the cloud platform via the MQTT protocol for analysis.
Kelude Heavy Industry — Specialized in crane design and manufacturing, with products fully compliant with the ISO 24445:2020 standard system.
