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Load Cell Manufacturers and Suppliers

IQS Directory provides a comprehensive list of load cell manufacturers and suppliers. Use our website to review and source top load cell manufacturers with roll over ads and detailed product descriptions. Find load cell companies that can design, engineer, and manufacture load cell to your companies specifications. Then contact the load cell companies through our quick and easy request for quote form. Website links, company profile, locations, phone, product videos and product information is provided for each company. Access customer reviews and keep up to date with product new articles. Whether you are looking for manufacturers of hydraulic load cells, low capacity load cells, thin beam load cell, or customized load cells of every type, this is the resource for you.

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Our load cells are manufactured with the highest attention to detail at all stages. Whether it is through the design stage, engineering stage, or through hundreds of tests run daily, we ensure that our products outshine all competitor products. That is why high profile customers like NASA trust us with their business. Find out why we make all the difference by contacting us today!
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Tecsis LP specializes in designing and manufacturing load cells for the most challenging applications. Our in-house engineering team will create a one-of-a-kind sensor or modify our standard product to meet your needs. Our state-of-the-art manufacturing facility delivers all industrial load cell configurations including low profile pancake, donut, shear beam, canister, and in-line models, each one integrated with a complete offering of electrical connectors, outputs, and mounting options.
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We supply Multi-Axis Force/Torque Sensors. Our F/T Sensors measure all six components of force and torque. ATI F/T transducers use silicon strain gauges for low-noise and high overload protection. Our sensors are used in robotic assembly, robotic material removal, product testing, biomedical and biomechanical research.
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We`ve got the products for all of your load cell needs! HITEC has over 45 years of industry experience that we put to work in designing our products. We do this because we want to offer you a product that will add value to both our business and yours. Call us today for more information!
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At Carolina Scales, we strive to take weighing solutions to a new level. We continuously evaluate emerging technologies and partner with other leading manufacturers to offer our customers the most advanced, yet cost-effective solutions available for specialized applications. With over 30,000 quality load cells and mounts available, nobody offers faster, more reliable service.
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Industry Information

Load Cells

Load cells are measuring devices that monitor and gauge forces of compression, tension and shear. They are a type of transducer that converts sensed mechanical force into electrical signals for measurement used in mechanical testing, ongoing system monitoring and as components in devices such as industrial scales.

Of the three major categories by which load cells measure force, compression and tension are the most commonly employed. Sometimes a load cell will measure an object through both of these applications, rather then one or the other. Both compression and tension loadcells often use strain gauges; strain gauges are very small devices that measure the strain of an object by converting internal deformation into electrical signals, precisely measuring weight, force or strain. Force gauges use strain gauges in push-pull testing and flow measurement. While most load cells measure and test with strain gages, some use piezoelectric sensors, which utilize piezoelectric crystals to measure weight, strain, movement and vibrations. Pressure sensors and force sensors are transducers very similar to load cells that measure pressure, applied force and strain in gas pressure, altitude and liquid pressure. These sensors are often piezoelectric sensors. Many of these sensors, although quite small, are built to support or to hold as much as several tons; miniature load cells are built to provide precise measurements for much smaller applications. Equipment such as force transducers, torque sensors and load sensors all sustain strain gauges or load cells that measure and convert energy. Digital load cell technology is the most popular way to access the information gained through the sensors.

Various types of load cells, pressure sensors and gauges are used in manufacturing, processing and testing industries. Pressure sensors and load cells are used in food processing industries to precisely measure ingredients and to properly distribute the products during packaging. In industrial warehouse environments, where pallets of inventory are shuffled around, load cells are often used to determine the precise weight of loaded pallets, which is crucial for the filling and accepting of orders. Other load cell applications include the testing of bridge building materials such as beams for tension strength, as well as in railcar weighing and truck scales. Load cells are essential components in many calibration systems, as well as for fatigue testing in research and development laboratories. With reading accuracies within 0.25%, load cells, sensors and gauges provide accurate mass, weight and pressure measurement of very small loads to loads of several thousand tons.

After load cells transduce mechanical stress into electrical energy, the information that loadcells monitor is then signaled to a recorder or other computerized data collection system. Analog or digital load cell technology is used for the recording and transferring of information. Digital load cells have become more popular than analog load cells in recent years because they work faster, have a higher accuracy rate and better resolution. When load cells are used to measure any variance in certain ongoing systems, the load cells can sound an alarm or shut down the system itself until the discrepancy is corrected. Load cells can vary greatly in size and shape depending on the industrial arena they will be utilized in. The two basic components of a load cell are the sensing element and circuit. The sensing element is most often a strain gauge, which is comprised of coil. However, it can also be a piezoelectric sensor that utilizes crystals. The circuit is the connection of these gauges or sensors throughout the load cell.

Load cell outputs include analog voltage, analog current, analog frequency, switch or alarm, serial and parallel. The most basic designs consist of four gauges, which make up the measuring circuit. More complex and detailed cells can have up to thirty gauges as part of the measuring circuit. The arrangement of gauges is usually done according to the Wheatstone bridge equation, which was developed in 1833 by Samuel Hunter Christie. It was not until ten years later though that the equations' namesake improved upon it and made it popular. The more gauges inside the load cell, the more sensitive the cell is in recording and monitoring variance in measurement. In calculating capacity of a load cell, factors that must be considered are: the maximum force value, the dynamics of the system (i.e. frequency response), the effect that placing the transducer in the force path will have and the maximum extraneous loads that the load cell will handle. When mounting load cells, such factors must be considered: whether the load cell be in the primary load path or whether it will see the forces indirectly; whether there are any physical constraints that should be met for size and mounting; what level of accuracy is required, and what environmental elements the load cell will be subjected to that may cause special problems. These complexities are necessary to have the correct measuring force load cell in place, to ensure the safety and productivity of the industries employing them.


Compression load cells
Load Cells
Mini load cells
Compression load cells - Strainsert Company
Load Cells - Strainsert Company
Mini load cells - Cooper Instruments & Systems
Load Cells
Mini load cells
Load Cells
Load Cells - Strainsert Company
Mini load cells - Cooper Instruments & Systems
Load Cells - Strainsert Company



An Introduction to Load Cells and Their Applications

A load cell is a force transducer that is most commonly used in weighing scales and other manufacturing equipment. The key objective of a load cell is to help the user measure the physical quantity or mass. More technically, a load cell is an electromechanical tool used across industries, from medical to architecture and from domestic to scientific research.

The use of load cells can be found in many appliances, such as security systems, weighing scales, personal scales, machines in the defense sector, weighing equipment in research laboratory and pharmaceutical production, industrial automation, submarine pressure sensing, and material testing. In the construction industry, weight measuring machines are used to test the strength of the structure.

Load sensors can be found in thermometers, as well as electrical weighing scales, and even in underwater submarines. They are a must-have tool for small and heavy scale manufacturing industries. Load sensors play a very significant role in automation precision. Additionally, security systems are all designed on the working principles of transducers.

How do load cells work?

As a load is applied onto a surface, the sensor changes its shape or physical status. The job of the sensor is to measure that shift, stress, tension, or compression on its surface.

There are different types of load cells, each work based on different principles. These types include:

  • Strain gauge load cells: These are the most common types of load cells. Having a capacity rate between 5 N to more than 50 MN, these transducers offer high-res digital indicators and meet ideal force transfer standards.
  • Piezoelectric crystal force transducers: These cells are used for measuring crystalline materials. Whenever a force is applied to a crystalline material, electric charges are generated. A piezoelectric force transducer with its charge amplifier measures the electric charge and converts the measurement into a digital signal that a user can read on the indicator. A multi-component piezoelectric, hydraulic and pneumatic load cell is also available.

Some other types of force or energy measurement and conversion tools include elastic systems, vibration systems, magneto-elastic devices, and dynamic balance devices. All of these classifications are not very technical, rather they more closely follow the traditional methods of measurement.

Capacity-based load cells are also available and provide low capacity, mid capacity, and high capacity output options. The low capacity machines are ideal for home use, while the mid and high capacity versions are used within more complex manufacturing systems.

Currently, strain gauge based force transducers are also widely used. The measurement output depends on the recommendations of the Wheatstone Bridge circuit concept. This circuit, however, did not have a diagram or scheme for the strain gauge system. The inventor had anticipated that a change in the resistance of an object is directly proportional to the force, load or pressure applied to it. The transducer makes the amount of force or pressure visible or readable for the user.

Different Types of Load Cells

The technical definition of a load cell is often tough to comprehend. A load cell is a transducer, using an engine which generates electrical signals of a certain magnitude. A transducer is a mechanical device that works as a converter between two forms of energy. Therefore, a load cell converts energy from one medium to another.

To put it simply, a load cell is a mechanism that is devised on an electronic weighing scale. It works as a sensor that responds to the weight applied on the upper surface of a machine. That sensor then sends the interpreted data to the LED screen of the machine, which displays the accurate weight applied. The importance of correct weight measurement is undeniable. Load cells are highly accurate transducer mechanisms that give highly important information to the user.

The force or energy applied on the surface of a machine is converted and sent as a signal to the LED indicator of the weighing scale.

Different Types of Load Cells

The function of load cell transducers is not just limited to weighing. As stated earlier, these devices convert force or energy into another form and can be used in many other applications. Load cells can efficiently translate between different forms of energy, such as force, torque, light, motion, etc. Also known as load transducers, load cells are used in a number of automation, sensor, and control systems across industries.

  • Low capacity transducers: These miniature transducers are employed in medical testing equipment, wind tunnel sensors, weight counting machines, etc. Since they are low capacity, they have some limitations as well. You can only gauge the weight between 0.9 ounce and 150 pounds. However, this specific feature makes them suitable for residential and retail machine applications.
  • Mid capacity transducers: These load cells have the capability to accurately measure weight between 200 to 20,000 pounds. They are an ideal option for all types of industry and manufacturing applications. Some common uses include industrial scales, truck, and truck weighing scales, bolt force measurement machine, and massive platform scales.
  • High capacity transducers: These load cells can perfectly measure even a very high weight. To be specific, these devices can measure anything more than a weight of 25,000 pounds.
  • Specialty transducers: There are also varieties of transducers that can be used underwater and in space.

How Load Cells Function

Load cell instruments aim to highlight the actual mass of a material. They are produced based on the principles of mass measurement under fluid pressure, elasticity, magnetic effect, piezoelectric and zero environments.

Load cells can efficiently perform precise and linear measurement, without showing any differences in data caused by changes in the environment or medium. Today's advanced load cells typically offer a very long life due to their sustainable design. Their design includes no moving parts that decrease the chances of machine damage.

Four Factors that Affect the Accuracy of Electric Weighing Scales

Simply put, electric weighing scales are machines that manufacturers use to check the weight of an item. Scales can be found in households, stores, manufacturing units, and research laboratories. These objects use different types of weighing machines, all have unique and dissimilar capacities.

In today's society, the efficacy and accuracy of balancing scales are at their best. Scientific explorations have made it possible for us to accurately assess the weight even to the hundredth and thousandth of a decimal. There are no chances of inaccuracy when measuring the weight of an item on an electric scale.

However, there are a number of factors, whether intended or not, that may have an effect on the accuracy of scales. These include:

  1. Correctness of Load Cell: If you are an end user, this may confuse you. A balancing scale gets its accuracy from one of its parts, called a load cell. The load cell is a transducer sensor that converts the force, applied by an item placed on the machine, into a signal that displays the actual weight of that item. For accurate results, you need to pick a machine that has been produced using high-quality load cells. Only the correctness of the load cells can ensure that you get the most clear-cut weight measurement of your commodities.
  2. Load Application Process: When assessing the G-factor of an item, you need to make sure that you are applying or putting on the load correctly on the machine, as per the suggestions provided with a user manual. This process is easier if you are using a low capacity home or small business machine. Heavy items pose a greater intricacy in loading and unloading weight on a scale. To check the accurate weight of a heavy item and to avoid strain gauges, the load should be applied correctly and evenly on the machine. The load points should be aligned properly.
  3. Weighing Environment: When measuring hefty loads, ensure that only the load is being applied on the scale. Keep any and all environmental factors such as wind and temperature in check. That is why choosing a safe site to install the mid and large level balancing scale is important. All these factors can result in a massive change in the gross weight. While doing this, you also have to avoid pressure differentials.
  4. Installation and Use of Weight Controller: Improper installation can be the key reason behind inaccurate poundage and a hefty loss in time and materials. You should ensure that proper balance is applied to your scale and surrounding environment. Refer to the installation guide provided by the machine supplier for more information. Further, you can intelligently deploy a weight controller system to reduce the noise and other similar effect during the mass check routine.



Load Cell Types

  • Absolute pressure transducers or sensors have an internal reference chamber sealed at vacuum or near vacuum and typically provide increasing output voltage for increases in pressure.
  • Bending beam load cells have low profile construction for integration into restricted areas.
  • Canister load cells may feature an all stainless steel design and are hermetically sealed for washdown and wet area. Canister load cells are utilized in both single and multi-weighing applications.
  • Compression load cells are used for measurement of a straight line pushing force along a single axis. This pushing force is often denoted as negative force.
  • Digital load cells utilize digital technology, as opposed to the more commonly used analog voltage, to measure tension, compression and shear.
  • Force gauges are devices inside a load cell that measure and monitor and compression and tension.
  • Force sensor is a common synonym for load cell.
  • Force transducers use a spring element to measure applied force, which is then transmitted to computer systems to be interpreted.
  • Hydraulic load cells are force-balance devices, measuring weight as a change in pressure of the internal filling fluid. Typical hydraulic load cell applications include tank, bin and hopper weighing.
  • Interface load cells are used as part of a larger system that constantly measures force and torque.
  • Load sensors communicate to a computer how heavy the load is.
  • Loadcells convert mechanical force through compression, tension or shear into measurements interpreted by electrical signals.
  • Low profile load cells are compression and tension/compression load cells often used in weighing and in-line force monitoring.
  • Miniature load cells are designed to fit into tight areas.
  • Multi load cell scales are the most accurate scales, as they take readings from more than one point of the scale.
  • Platform or single point load cells provide accurate readings regardless of the positioning of the load on the platform.
  • Pneumatic load cells operate on the force-balance principle. These devices use multiple dampener chambers to provide higher accuracy than a hydraulic device and contain no fluids that might contaminate the process should the diaphragm rupture.
  • Pressure sensors measure pressure in a fluid network.
  • S-beam load cells are S-shaped and provide superior side load rejection and an output if under tension or compression.
  • A strain gage simply measures the strain of particular objects or systems when under stress to desipher their strength and durability.
  • Strain gauges are devices that measures strain when stress is applied.
  • Shear cells are often attached to a bending beam to measure a deformation in which planes of material slide with respect to one another.
  • Silicon pressure sensors contain four piezoresistors located within the face of a thin, chemically-etched silicon diaphragm. The diaphragm flexes with changes in pressure, causing a stress or strain in the diaphragm and the buried resistors; the resistor values are proportionally related to the stress applied and produce an electrical output.
  • Strain gauge load cells convert the load acting on them into electrical signals. The gauges themselves are bonded onto a beam or structural member that is deformed when weight is applied.
  • Tension load cells are used for measuring the pulling apart or positive force along a single axis.
  • Torque sensors measure the torque transferred along the driveline axis at the place where the sensor is positioned.



Load Cell Terms

Axial Load - The load applied to the length of, or parallel to, the primary axis with which it shares a common axis.
 
Calibration - Load cells output comparison against standard test loads.
 
Creep - The output change of load cells that occurs over time while the load cell is under load, while all environmental conditions and other variables have remained constant.
 
Dead Volume
- The volume inside the pressure port of force sensors, or transducers, at room temperature and barometric pressure.
 
Deflection - The change of length along the primary axis of load cells involving no-load and rated-load conditions.
 
Diaphragm - The membrane part of force sensors that changes its value under pressure-induced displacement.
 
Drift - An unexpected change in output under constant load conditions.
 
Driveline Shaft - A steel tube with a u-joint at each end of load cells that transfer torque from the output of the transfer case to the axle.
 
Eccentric Load - A load, which is applied parallel to, but not having a common axis with, the primary axis of load cells.
 
Electrical Excitation -The current or voltage that is applied to the input terminals of a transducer.
 
Flush Diaphragm - A sensing device of load cells that is located on the very end of a transducer with no pressure port.
 
Full Scale - The amount produced equivalent to the maximum load for a specific load cell application or test.
 
Full Scale Output - The numerical distinction between the least output and the rated capacity of load cells.
 
Hysteresis - The greatest difference between load cell output readings for the same applied load. One load cell reading is obtained by escalating the load from zero, the other load cell reading by lessening the load from rated output.
 
Input Impedance - The resistance measured across the excitation terminals of a transducer at room temperature at the point where there is no load applied and the load cell output terminals are open-circuited.
 
Load - The force, weight or torque that is applied to the transducer, load cell or force sensors.
 
Load Cell - The round shape of the top surface of load cells, transducers or load sensors where the load is applied.
 
Measured Media - The physical number, property or circumstance that is measured by load cells, such as acceleration, force, mass or torque.
 
Piezoresistance - The change in resistance caused by an applied strain of the load cell diaphragm.
 
Primary Axis
- The geometric centerline (axis) along which load cells are designed to be loaded.
 
Pull Plate - An attachment to load cells, which allows tension or compression forces to be directed at the center line of load cells through a threaded center hole.
 
Safe Overage - The maximum pressure or load that may be applied to the transducer, load cells or force sensors without causing permanent damage or a change in the load cell performance specifications.
 
Shear - Force that tends to divide an object along a plane parallel to the opposing stresses within load cells.
 
Strain Measurement - The ratio of the change of the length of a structure when force is applied to it to the dimension of the original length.
 
Zero Balance - The output signal rated excitation of load cells with no load applied, usually expressed in percent of rated output.






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