Recently, the Ministry of Transport officially released the industry standard JT/T 1577-2026, “Technical Requirements for Weighing Safety Protection Systems of Grab Cranes,” which will officially come into effect on August 1, 2026. As a leading domestic provider of safety monitoring solutions for construction machinery, Yichang Seezol Technology Co., Ltd. (hereinafter referred to as “Seezol Technology”), with its profound technical accumulation and innovation capabilities, actively responds to the upgrade of industry standards, providing reliable technical support for the safe operation of grab cranes.
Precisely Aligned with Standard Requirements
The JT/T 1577-2026 standard sets forth strict technical specifications for the weighing safety protection system of grab cranes, covering key indicators such as weighing sensor accuracy, signal processing capabilities, display and alarm functions, and control response time. Seezol Technology’s grab crane weighing safety protection system strictly adheres to national standards such as GB/T 3811 and GB 6067.1. The system’s overall accuracy reaches ≤±0.5%FS, and the dynamic weighing error is controlled within ≤±2%FS, fully meeting the metrological performance requirements stipulated in the standards.
Core Technological Advantages
Seezol Technology’s independently developed Load moment Indicator (LMI) system possesses the following core advantages:
Intelligent Monitoring: Real-time monitoring of lifting weight, working radius, and lifting moment, supporting 90% early warning and 100% alarm functions.
Fast Response: Control response time ≤50ms, effectively preventing dangerous overload operations.
Data Logging: Automatically stores the most recent 1000 operation records, supporting data export and analysis.
High Reliability: Mean Time Between Failures (MTBF) exceeds 10,000 hours, protection level reaches IP65/IP67.
Metrological Performance Indicators
According to the requirements of JT/T 1577-2026 standard, Seezol Technology’s products meet all the following indicators:
| Test Item | Standard Requirement | Seezol Technology Measured Value |
| Dynamic Weighing Error | ≤±3%FS | ≤±2%FS |
| Static Weighing Error | ≤±1%FS | ≤±0.5%FS |
| Display Resolution | ≤1%FS | ≤0.5%FS |
| Control Response Time | ≤100ms | ≤50ms |
| Protection Rating (Outdoor) | ≥IP65 | IP67 |
Wide Application Areas
Currently, Seezol Technology’s products are widely used in the following fields, with clients including well-known domestic and international companies:
Port Logistics — Safety monitoring of port loading and unloading equipment
Mining — Load monitoring of mining excavators
Construction — Safety protection for tower cranes and crawler cranes
Logistics Transportation — Vehicle-mounted weighing system solutions
Oil Drilling — Load moment monitoring of heavy equipment
Creating a Safe Future Together
With the implementation of the JT/T 1577-2026 standard, the safety supervision of grab cranes will become more standardized and orderly. Seezol Technology will continue to leverage its technological advantages to provide the industry with high-quality products and solutions that meet the standard requirements, promoting the continuous and healthy development of the construction machinery safety industry. The company always adheres to the mission of “making construction machinery safer,” continuously deepening its expertise in safety monitoring technology to create greater value for customers.
For more product information, please visit: www.szlmi.com
Hotline: +86 15307204803 | Email: [email protected]
