Product Application - Drag Chain Conveyor


4B has a wide range of sensors for monitoring the various parts of your drag chain conveyor. The most


common areas for monitoring include: bearing temperature, speed / motion, level / plug indication and


slack / broken chain detection.


All of 4B's sensors can be connected to our hazard monitoring systems.


4B also has has an entire line of material handling products, including - drop forged chain.

Drag Chain Conveyor
Illustration shows typical sensor placements, applications may vary.
  • Sensors
  • Monitoring Systems
  • Drop Forged Chain
Bearing Temperature Sensor

(1) Bearing Temperature Sensor

The sensor screw directly into a bearing housing through the existing grease zerk thread. Each sensor is fitted with a grease zerk to allow lubrication of the bearing without the need for
removal of the sensor.

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Surface Temp Sensor

(2) Surface Temperature Sensor

Bolts directly onto a bearing housing, motor, gearbox, or machine casing for continuous temperature monitoring.

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(3) Plug / Choke Sensor

Detects plug or choke situations for bulk granular solids or liquids in chutes, conveyors and elevator legs.

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Speed Switch

(4) Speed Switch Sensor

The M800 Elite speed switch is a inductive proximity sensor for monitoring shaft underspeed conditions. With two under speed relay contact outputs and a pulse output, the self contained unit provides the user with easy on site installation and consistent reliability.

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WDA Sensor

(5) WDA Sensor - Slack/Broken Chain Detection

Non-contacting extended range magnetic proximity sensor, not affected by dust or material build up, used to detect moving ferrous material up to 3 inches away from the sensor. Used for detecting slack / broken chain on drag chain conveyors.

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Watchdog Super Elite Hazard Monitor

Watchdog™ Super Elite Hazard Monitor

The Watchdog™ Super Elite processes signals from sensors for belt misalignment, belt speed & slip, continuous bearing temperature, pulley misalignment and plug conditions for bucket elevators or belt conveyors.

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T500 Hotbus

T500 Elite Hotbus™ Hazard Monitor

The T500 Elite Hotbus is a serial communications system designed to monitor up to 256 sensors on multiple bucket elevators and conveyors for belt speed, belt alignment, bearing temperature, level and plugged conditions.

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Drop Forged Chain

Drop Forged Conveyor Chain

4B’s drop forged conveyor chain is made of special heat treated alloy steel case hardened to Rockwell C57 - C62 with a ductile core hardness of Rockwell C40. 4B’s superior heat treatment technique provides the optimum chain link with a more resilient ductile core for shock resistance, and an extremely hard exterior surface for superior wear resistance.

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