Checkweigher, In-Motion Scales and Balances
Last Updated: April 1, 2025
Description
Checkweighers are devices used in manufacturing processes to ensure that products are within a specified weight range. They are integrated into production lines to automatically weigh items as they pass through, ensuring consistency and quality control by removing products that do not meet weight specifications.
Working Principle
Checkweighers operate by using a weigh cell, which can be based on different technologies such as load cells or force restoration principles. The load cell typically consists of flexures on a load-bearing surface and a strain sensor. As products move across the checkweigher, the weigh cell measures the weight of each item. The accuracy of these measurements is influenced by factors such as conveyor speed and the stability of the item during weighing. Generally, accuracy improves as conveyor speeds decrease and the stability of the item increases. Transport chains can offer more accurate measurements compared to belts, provided they handle the product effectively .
Applications
Checkweighers are commonly used in various industries for quality control. For example, in the food industry, they ensure that packaged goods meet weight specifications to comply with regulations and avoid customer dissatisfaction. In pharmaceuticals, checkweighers verify that each package contains the correct amount of product, which is crucial for dosage accuracy. They are also used in logistics to verify the weight of parcels before shipping, ensuring that shipping costs are calculated correctly .
Advantages over other Scales and Balances
Checkweighers offer several advantages over traditional scales and balances. They provide continuous, automatic weight verification without interrupting the production process, which enhances efficiency and productivity. Unlike static scales, checkweighers can handle high-speed production lines, making them ideal for large-scale manufacturing operations. Their integration into production lines allows for real-time weight monitoring and immediate rejection of non-conforming products, reducing waste and ensuring compliance with weight regulations .
Limitations
One limitation of checkweighers is their dependency on the stability of the product during weighing. Items that are unstable or irregularly shaped may result in less accurate measurements. Additionally, the accuracy of checkweighers can decrease at higher conveyor speeds, which may necessitate a trade-off between speed and precision in some applications .
Considerations
When considering the implementation of checkweighers, several factors should be taken into account. Initial costs can be significant, especially for high-precision models or those designed for high-speed operations. Operating expenses include maintenance and calibration to ensure ongoing accuracy. Durability is another consideration, as checkweighers must withstand the rigors of a production environment. Accuracy is paramount, and regular maintenance is required to maintain it. Replacement and maintenance costs should also be factored into the total cost of ownership, as these can impact the long-term financial viability of using checkweighers in a production setting .
from QMI Services
QMI Checkweighers and Integrated Weighing Systems. QMI provides many types of checkweighers and inline weighing systems. Call us for a quotation or use our project quote page. We provide standalone systems as well as full service integration to existing lines. Order Fulfillment and Distribution... [See More]
- Type: Checkweigher, In-Motion; Check Weighing Scale
from VEGA Americas, Inc.
Application area. The frame construction offers a simple mounting option for a retrofit on a conveyor belt, to enable non-contact throughput measurement of bulk solids. The WEIGHTRAC 31 is a radiation-based sensor for precise flow measurement of bulk solids. It is ideal for mass flow determination... [See More]
- Type: Checkweigher, In-Motion; Conveyor Scale
- Interface: Other Interface; Outputs: Profibus PA, Foundation Fieldbus, 4 20 mA/HART - four-wire
- Material: Stainless Steel; Other; Aluminum
- Ratings / Certifications: IP66; IP67
from Mettler-Toledo Technologies GmbH
Precision and Versatility. A throughput of up to 600 packs per minute, a weighing range from 3 g to 10 kg and extremely high weighing accuracy position the CM35 AdvancedLine at the vanguard of checkweighing and metal detector technology. Customized Product Handling. Fully customizable with 250... [See More]
- Type: Checkweigher, In-Motion; Conveyor Scale
- Max. Throughput: 500
- Capacity: 22.05
- Display: Digital Display
from Fairbanks Scales, Inc.
Package Scale In-motion System is an NTEP approved, high-speed, accurate and configurable in-motion weighing system ready to take on your high speed package applications in areas like parcel shipping, random weigh capture and retail boxing processes. At its core is the FB3000 Solution Series... [See More]
- Type: Checkweigher, In-Motion; Truck Scale
- Display: Digital Display
from QMI Services
A hi-speed, fully integrated in-motion cubing and weighing system. CubiScan 200-TS. The CubiScan ® 200-TS is an integrated in-motion dimensioning and weighing system. This dual functionality, in one concise footprint, gives you the power to quickly measure and weigh your parcels on-the-fly. [See More]
- Type: Checkweigher, In-Motion
from Mettler-Toledo Technologies GmbH
Precision and Versatility. This combined checkweighing and X-ray inspection system integrates precision weighing, contamination detection, and quality control functions in one space-saving device, offering compliance with industry standards for packaged products up to 10 kg. Precision Weighing for... [See More]
- Type: Checkweigher, In-Motion; Conveyor Scale
- Max. Throughput: 500
- Capacity: 22.05
- Display: Digital Display
from QMI Services
Features. The CubiScan 150 is robust, with a maximum measurement range of 39 x 40 x 48 inches (100 x 100 x 120 cm) and a net weight capacity of 150 lbs (70 Kg). Yet it is precise, with a measurement resolution of 0.1 inches (0.2 cm) and weight resolution of 0.05 lbs (20 g). The CubiScan 150 is... [See More]
- Type: Checkweigher, In-Motion
from Mettler-Toledo Technologies GmbH
Precision and Versatility. Built for harsh environments, the C35 combines uncompromising precision at fast speeds with a stable and resilient system design which, including the HMI, is fully IP69 rated and proven resistant to most caustic detergents and high-pressure cleaning. Highest Accuracy in... [See More]
- Type: Checkweigher, In-Motion; Conveyor Scale
- Max. Throughput: 250
- Capacity: 15.44
- Display: Digital Display
from Mettler-Toledo Technologies GmbH
Maximum Capacity 10 lb (6 kg). Readability 0.001 lb (0.5 g). Repeatability (sd) 0.00044 lb (0.2 g). Platform Size (LxWxH) 9.5 in x 11.8 in x 3.81 in (240 mm x 300 mm x 97 mm). Material Stainless Steel V2A (AISI 304). Protection Rating IP65; IP67; IP68; IP69k. Display Graphic LCD with backlit. [See More]
- Type: Bench / Counter Scale; Checkweigher, In-Motion
- Width: 11.8
- Capacity: 10
- Length: 9.5
from Mettler-Toledo Technologies GmbH
Maximum Capacity 100 lb (60 kg). Readability 0.01 lb (5 g). Repeatability (sd) 0.0047 lb (2.1 g). Platform Size (LxWxH) 11.8 in x 15.7 in x 4.25 in (300 mm x 400 mm x 108 mm). Material Stainless Steel V2A (AISI 304). Protection Rating IP65; IP67; IP68; IP69k. Display Graphic LCD with backlit. [See More]
- Type: Bench / Counter Scale; Checkweigher, In-Motion
- Width: 15.7
- Capacity: 100
- Length: 11.8
from Mettler-Toledo Technologies GmbH
Maximum Capacity 25 lb (15 kg). Readability 0.002 lb (1 g). Repeatability (sd) 0.0009 lb (0.4 g). Platform Size (LxWxH) 12 in x 12 in x 4.25 in (305 mm x 305 mm x 108 mm). Material Stainless Steel V2A (AISI 304). Protection Rating IP65; IP67; IP68; IP69k. Display Graphic LCD with backlit. Interfaces... [See More]
- Type: Bench / Counter Scale; Checkweigher, In-Motion
- Width: 12
- Capacity: 25
- Length: 12
from Mettler-Toledo Technologies GmbH
Maximum Capacity 12 lb (6 kg). Readability 0.00002 lb (0.01 g). Readability (Certified) 0.0005 lb (0.2 g). Platform Size (LxWxH) 14 in x 11 in x 5.3 in (345 mm x 275 mm x 135 mm). Material Stainless Steel V2A (AISI 304). Hazardous Approval ATEX Cat. 2GD; FM Div 1. Protection Rating IP66; IP68. [See More]
- Type: Bench / Counter Scale; Checkweigher, In-Motion; Counting Scale
- Width: 11
- Capacity: 12
- Length: 14