How to Properly Mount a Bellow Type Load Cell
2025-12-24
Bellow type load cells are widely used in industrial weighing applications such as tanks, hoppers, silos, and batching systems. Known for their high accuracy and ability to compensate for misalignment, these load cells still require correct installation to deliver reliable and long-term performance. Understanding how to properly mount a bellow type load cell is essential for achieving precise measurement and protecting the sensor from damage.
Understand the Working Principle Before Installation
A bellow type load cell typically uses a metal bellows structure to transfer load to the sensing element while isolating it from side forces. This design helps reduce errors caused by vibration, thermal expansion, or slight misalignment. However, improper mounting can negate these advantages and lead to inaccurate readings or premature failure.
Before installation, it is important to review the manufacturer’s specifications, including load capacity, mounting direction, and environmental limits.
Prepare a Stable and Level Mounting Surface
The mounting surfaces above and below the bellow type load cell must be flat, rigid, and level. Uneven or flexible surfaces can introduce off-axis forces that affect measurement accuracy. The load should be applied vertically and evenly across the load cell to ensure consistent performance.
Using mounting plates or load cell modules can help simplify installation and improve stability.
Allow for Free Vertical Movement
One key requirement when mounting a bellow type load cell is allowing free vertical movement of the load. The structure being weighed should not be constrained by rigid pipes, brackets, or supports that can carry part of the load. Flexible connections, such as expansion joints or flexible hoses, are recommended to prevent external forces from influencing the measurement.
Control Side Loads and Vibration
Although bellow type load cells offer some protection against side loads, excessive lateral forces can still affect accuracy. Guide mechanisms or anti-lift devices can be used to control horizontal movement without restricting vertical load transfer. In environments with vibration, damping elements may be added to improve measurement stability.
Proper Cable Routing and Environmental Protection
Signal cables should be routed carefully to avoid tension, bending, or interference from electrical noise. Secure the cables with sufficient slack and protect them from sharp edges or heat sources. In outdoor or harsh industrial environments, additional protection such as enclosures or covers may be required to shield the load cell from moisture, dust, or corrosive substances.
Perform Calibration After Installation
Once the bellow type load cell is mounted, calibration is essential to ensure accurate readings. Calibration should be performed under actual operating conditions using certified test weights or a calibrated system. Regular inspection and recalibration help maintain long-term accuracy and system reliability.
Conclusion
Proper mounting of a bellow type load cell is critical for accurate and stable weighing performance. By ensuring level installation, allowing free vertical movement, controlling side loads, and performing correct calibration, users can maximize the benefits of bellow type load cell technology. Correct installation not only improves measurement accuracy but also extends the service life of the weighing system in demanding industrial applications.
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