Single-Point Load Cells

Single-point load cells are sensors used to measure force or weight in a variety of industrial and commercial applications. These load cells typically have a flat surface, sometimes called a platform, which makes them ideal for use in weighing scales, platforms, and conveyor systems. Single-point load cells are designed to respond to force or weight applied to a single point on the platform, and they are capable of measuring loads ranging from a few grams to several tons. They are commonly used in the food and beverage industry, pharmaceuticals, chemical industries, and logistics. 

A single-point load cell works by converting weight or a force that is applied against it into a signal. When a load is applied to a single-point load cell, the resistance is changed, which leads to a change in output voltage. Single-point load cells are used alone in smaller and mid-size scales. METTLER TOLEDO offers a wide variety of single-point load cells in aluminum, steel, and stainless steel. Some models act as low-capacity single-point load cells and can be used individually in smaller bench scales and retail scales. The low-profile design includes sensitive load-cell sensors, yet saves cost without compromising on performance. Other options include meeting the needs of higher capacities and can be used individually in bench and floor scales with larger platform sizes.

METTLER TOLEDO's load cells are used in various industries including food, pharmaceutical, and chemical applications.  They are available in various capacities and versions to meet the application and environmental needs of OEM machine manufacturers, system integrators, and end-users. A broad range of accessories is available for load cells including base plates, load introduction hardware, and isolators to cope with heat, shock, and vibration.  

METTLER TOLEDO offers a wide range of load cells from 3-kilogram up to 300-ton capacity. Load cells are available in aluminum, plated steel, or electro-polished stainless steel. They are available in various legal-for-trade accuracy classes according to OIML R60 and NIST HB44, including OIML C3, C6 and C10, and NTEP 5000d III S/M, 10000d III M and 10000 III L M. Single-point load cells are available for hazardous area applications and are approved according to ATEX, FM (Factory Mutual), cFM (Canada), IECEx and NEPSI. They meet protection classes IP67, IP68, and even IP69K.  

Multi-purpose single-point load cells are accurate single-point strain gauge load cells for scale design or smaller structure conversions. For example, the SLP845 and SSH single-point load cells are made from stainless steel, hermetically sealed by laser welding, and have threaded mounting holes for easy integration. The load cell has IP68/IP69K protection class for protection against dust and water. They can be quickly mounted to the support structure and to the weighing platter or receiver.  This makes the load cells very easy to integrate into new or existing weighing systems. Because only one load cell is required per scale, a junction box is not required, thus small platform and tank scales can be created very simply.

Aluminum single-point load cells are ideal for retail and industrial bench scales, packaging and processing machines, and small tank and hopper scales. The passivated aluminum provides good corrosion resistance for many dry industrial applications. The electrical circuit is potted and protected against dust and humidity to an IP67 rating. Low profiles and simple interfaces make integration easy. A broad capacity range makes them usable in a wide range of applications. Because only one load cell is used per scale, a junction box is not required.

High-capacity single-point load cells are sensors that can measure larger weights or loads compared to standard single-point load cells. They are designed to accurately measure heavy loads ranging from several hundred kilograms up to several tons. These load cells are typically used in industrial applications where heavy loads need to be weighed or monitored, such as in material handling systems, manufacturing processes, and vehicle weighing scales.

High-capacity single-point load cells are constructed using durable materials such as stainless steel and feature a robust design to withstand high-loading conditions and harsh environments. They also offer high accuracy, repeatability, and stability, making them reliable for use in demanding industrial applications. 

METTLER TOLEDO's single-point load cells enable the quick and safe integration of weighing technology into any machine for simple weighing, filling, dosing, batching, sorting, and checkweighing. There are several benefits to using single-point load cells:

1. Accuracy: Single-point load cells offer high accuracy and repeatability, making them ideal for applications where precise measurements are required

2. Cost-effective: Single-point load cells are generally less expensive compared to other types of load cells, making them an affordable solution for applications that require weight or force measurements.

3. Easy to install: Single-point load cells are easy to install and require minimal maintenance, which makes them a popular choice for industrial applications. 

4. Durable: Single-point load cells are built to withstand harsh environments and heavy loads, making them a reliable and durable choice for industrial applications.V

5. Versatile: Single-point load cells can be used in a variety of industrial and commercial applications, including weighing scales, conveyor systems, and packaging machines

Choosing the right single-point load cell requires consideration of several factors, including:

1. Weight capacity: Determine the maximum weight or force that the load cell needs to measure. Choose a load cell with a capacity that is slightly higher than your maximum load to ensure accuracy and reliability.

2. Sensitivity: Consider the sensitivity of the load cell. A higher sensitivity load cell will provide more precise measurements.

3. Accuracy: Look for a load cell with high accuracy and repeatability to ensure reliable and consistent measurements.

4. Environment: Consider the environmental factors such as temperature, humidity, and exposure to chemicals that the load cell will be exposed to. Choose a load cell that can withstand these conditions.

5. Size and shape: Choose a load cell that is appropriately sized and shaped for the application. For example, if the load cell will be used in a small-scale application, choose a smaller load cell.

6. Mounting: Consider the type of mounting required for the load cell. Choose a load cell that has a compatible mounting option for your application.

Overall, it's important to choose a load cell that meets the specific requirements of your application. It's recommended to consult with a load cell supplier or manufacturer to ensure you choose the right load cell for your needs.

Proper maintenance of your single-point load cell can help ensure accurate and reliable measurements. Here are some tips for maintaining your load cell:

1. Keep the load cell clean: Regularly clean the load cell with a soft, dry cloth to remove dirt and debris.

2. Check the mounting hardware: Inspect the mounting hardware for signs of wear or damage and tighten any loose connections.

3. Protect from moisture: Make sure the load cell is protected from moisture and humidity, which can cause damage to the load cell and affect measurements.

4. Calibrate regularly: Calibrate the load cell regularly to ensure accurate and consistent measurements.

5. Avoid overloading: Avoid overloading the load cell beyond its rated capacity, which can cause permanent damage.

6. Follow manufacturer guidelines: Follow the manufacturer's guidelines for installation, maintenance, and use of the load cell to ensure optimal performance.

7. Have a professional inspect the load cell: Have a professional technician inspect the load cell regularly to detect any potential issues.

By following these maintenance tips, you can help extend the lifespan of your single-point load cell and ensure accurate and reliable measurements.

METTLER TOLEDO’s single-point load cells support weightless calibration methods CalFree and CalFree Plus, allowing for scale calibration at the touch of a button.

Single-point load cells can be mounted in several different ways depending on the application and the load cell design. Here are some common mounting options for single-point load cells:

1. Compression mounting: Compression mounting is the most common mounting option for single-point load cells. In this method, the load cell is mounted underneath a platform, and the weight or force is applied to the platform. The load cell measures the force and converts it into an electrical signal.

2. Tension mounting: In tension mounting, the load cell is mounted above the platform, and the weight or force is applied to the load cell's upper surface. The load cell measures the force and converts it into an electrical signal.

3. Rod-end mounting: In rod-end mounting, the load cell is mounted at the end of a rod or bar, and the weight or force is applied to the rod or bar. The load cell measures the force and converts it into an electrical signal.

4. Baseplate mounting: Baseplate mounting is used in applications where the load cell needs to be mounted directly onto a baseplate or support structure.

5. Flush mounting: In flush mounting, the load cell is mounted directly into the platform, which allows for a low-profile installation.

6. Through-hole mounting: In through-hole mounting, the load cell is mounted through a hole in the platform, and the weight or force is applied through the hole.

The choice of mounting option depends on the specific application and the load cell design. It's important to choose a mounting option that is compatible with your load cell and provides accurate and reliable measurements.