The A2B (Anti Two-Block) Limit Switch by Load Sense Solutions is a critical crane safety device designed to prevent two-blocking conditions during lifting operations. Two-blocking occurs when the hook block comes into contact with the boom tip or upper sheave assembly, which can cause serious structural damage and lead to dangerous accidents.

The A2B Limit Switch instantly detects this unsafe condition and automatically stops hoisting movement, protecting the crane, wire rope, hook block, and operator.

Key Features

• Instant Two-Block Detection
Detects when the hook block approaches the boom tip beyond safe limits.

• Automatic Hoist Cut-Off
Immediately stops upward hoisting movement when triggered.

• Heavy-Duty Industrial Construction
Rugged design suitable for harsh construction, marine, and industrial environments.

• Seamless System Integration
Works independently or integrates with:
– Safe Load Indicator (SLI) Systems
– Load Moment Indicator (LMI) Systems
– Crane Control Systems

• Reliable & Fail-Safe Operation
Designed to provide consistent and dependable safety performance.

Technical Specifications

Product Type: Anti Two-Block (A2B) Limit Switch
Function: Hoist Motion Cut-Off
Application: Crane Safety Systems
Installation: Boom Tip Mounted
Integration: SLI / LMI Compatible
Construction: Industrial-Grade Housing