4B Group is a globally recognized manufacturer of monitoring and safety components for conveyor and elevator systems. With over 125 years of engineering expertise, the company delivers reliable alignment sensors, speed monitoring solutions, and hazard detection equipment certified for use in demanding industrial environments.

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Company Overview

4B Group, also known as 4B Components Ltd., is a UK-based manufacturer specializing in advanced control and safety solutions for bulk material handling equipment. With a heritage dating back over a century, the company has established itself as a global leader in conveyor and bucket elevator monitoring technologies. Its solutions are widely used in agriculture, mining, cement, food processing, and industrial automation.

Belt Alignment Sensors

One of the flagship product groups of 4B is its range of belt alignment detectors. These devices are critical for preventing belt drift and mechanical wear in conveyor systems.

Touchswitch is an electro-mechanical sensor that activates without mechanical contact, offering precise misalignment detection. It is installed along the conveyor structure and stops operations if the belt deviates beyond set limits.

Brass Rub Block is a temperature-sensitive monitoring block that detects excessive heat caused by belt friction, helping operators prevent fire hazards and system failures.

WDA Sensor is designed to detect ferrous metal components like bolts or chains. It serves both for alignment detection and for identifying broken chains, especially in bucket elevator systems.

Speed Monitoring Devices

4B also manufactures high-quality speed switches that play a crucial role in detecting slippage or stoppage in conveyor belts.

Models such as M100, M300, and M800 Elite use inductive or proximity technology to sense shaft rotation. These switches are ideal for zero-speed, underspeed, and overspeed detection, ensuring proper functioning of conveyor equipment and triggering automated shutdowns when necessary.

Hazard Monitoring Systems

To provide centralized safety control, 4B offers integrated hazard monitoring systems such as:

  • Watchdog Elite: A comprehensive system that monitors belt alignment, speed, temperature, and blockage across the conveyor network.
  • T500 Hotbus: A modular and scalable system designed to collect real-time data from multiple sensors and relay it to PLCs or SCADA systems via RS485/Modbus interfaces.

These solutions allow facility managers to implement predictive maintenance strategies, reduce downtime, and ensure full compliance with safety standards.

Certifications and Industrial Suitability

All 4B products meet major international safety standards including ATEX, IECEx, CSA, and CE. Their suitability for hazardous and dust-prone environments makes them a preferred choice in heavy-duty operations across the globe. The company’s focus on fail-safe design and ease of integration has made it a trusted partner for OEMs and system integrators.

Global Presence and Support

4B Group supports its global customer base through a strong network of subsidiaries, distributors, and technical partners. With manufacturing and engineering teams across Europe, North America, Asia, and Africa, 4B ensures timely delivery, localized support, and ongoing product development based on industry demands.