Load Cell
Comprehensive Guide to Structure, Types, Accuracy, and Applications
What is a Load Cell?
A load cell is an electronic sensor for measuring weight and force, manufactured in tension, bending, compression, and torsion types.
What are the Applications of Load Cells?
Load cells are used for measuring force and weight in various factories, as well as measuring cable tension and yarn tension in textile factories and other industries. Digital weight measurement in electronic scales also requires load cells. Today, various types of load cells with different capacities are widely used in the construction of electronic scales and weighbridges. Automatic systems based on weight measurement of materials in food factories, asphalt plants, and chemical plants all use load cells.
What is the Structure of a Load Cell?
A load cell consists of a metal core (made of a special alloy) and a number of strain gauges (a set of electrical resistors) that deform under applied force like all materials, but return to their original state after the force is removed. The degree of reversibility of this material determines the quality, accuracy, and longevity of the load cell.
What Does Load Cell Accuracy Mean and How is it Determined?
Load cell accuracy refers to its resolution relative to its total capacity as well as its total error limit. Factors involved in load cell accuracy and quality are the alloy type of the core and the strain gauge structure. The OIML institute, located in Switzerland, evaluates load cell resolution, total error, and load cell behavior under humidity and temperature based on specific standards and determines the load cell accuracy class.
Types of Load Cells
Load cells (in terms of appearance and application) are divided into the following groups:
1- Single-Point Load Cells
They have a single mounting point and are mostly used in retail scales, conveyor weighing, and packaging and filling machinery weighing.
2- Bending Beam Load Cells
Typically used in platform scales, bench scales, weighing systems, carcass scales, as well as hopper and tank weighing.
3- Double-Ended Bending Beam Load Cells
Mostly used in tank weighing, silo weighing, and weighbridge weighing.
4- Tension and Compression Load Cells
Typically used in hanging scales and weighing systems with a tensile nature.
5- Compression Load Cells
Includes canister compression, miniature, and single-point types. Used in batching systems, tank weighing, and railroad scales.
6- Weighbridge Load Cells
Column-type compression load cells, mostly used in tank weighing, silos, and weighbridges.
7- Special Load Cells
Various load cells with special applications such as wire and cable tension estimation, torque sensors, dual-axis sensors, and weighing plates fall into this group.
Famous Load Cell Brands
Prominent manufacturers such as Zemic, Celtron (Celltec), HBM, and Revere are among the well-known brands in load cell production. Kian Industry, as a specialized supplier, offers all types of load cells from these brands with the best quality and competitive prices.
Load Cell IP Protection Rating
Load cells have different IP protection ratings: IP66 (resistant to high-pressure water jets), IP67 (resistant to immersion in water), IP68 (resistant when submerged in pressurized water). The appropriate protection rating is determined based on the working environment conditions.
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Everything About Load Cell Sensors
From structure and accuracy to types and industrial applications — a complete reference for engineers and industry professionals
Load Cell Structure
Alloy core + strain gauges + Wheatstone bridge circuit — converting mechanical force into electrical signal
Accuracy Class
C3, C4, and C6 classes with accuracy of 0.03 to 0.1% — according to OIML R60 standard for industrial and commercial applications
Protection Rating (IP)
IP65 to IP68 — resistant to dust, moisture, and high-pressure water washing, suitable for harsh industrial environments
Load Cell Types by Application
Retail scales, conveyor weighing, packaging
Weighbridges, hoppers, tanks, and vessels
Tank weighing, silos, and industrial weighbridges
Hanging scales, hoppers, overhead cranes
Batching systems, tank weighing, railroad scales
Wire/cable tension estimation, torque sensor, dual-axis
Load Cell Applications in Industry
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