The linear combination weigher Cost Guide

Introduction to the linear combination weigher Cost Guide

The linear combination weigher is a cost-effective solution for many packing lines, especially where moderate speed and high accuracy are required. This guide explains realistic price ranges, the components that drive cost, ongoing expenses, and how to evaluate total cost of ownership. Whether you plan to buy your first linear combination weigher or replace an existing unit, this guide will help you make an informed purchasing decision.

What is a linear combination weigher?

A linear combination weigher is an automated weighing machine that uses multiple linear weighing channels feeding into a single collection system to combine partial weights until the target pack weight is reached. It is distinct from a circular multihead weigher and is often used for products that require gentle handling, longer dwell time, or compact inline layouts. The phrase linear combination weigher is widely used in industries such as snacks, confectionery, frozen foods, and non-food items.

How a linear combination weigher works

Linear channels weigh small portions of product. Sophisticated control software calculates the best combination of channel weights to reach the target weight with minimum giveaway. Once the combination is selected, the machine discharges the combined portion onto a discharge conveyor or into a packaging machine. The linear combination weigher relies on accurate load cells, fast gates, and a capable control system to achieve consistent results.

Typical linear combination weigher cost ranges

Understanding market price ranges helps set realistic procurement budgets. Costs vary widely depending on capacity, configuration, and supplier. Below are typical ranges to expect:

Entry-level and compact linear combination weighers

Price range: approximately USD 6,000 to USD 20,000. These units are suited for small producers, R&D, or low-speed specialty lines. They typically offer a small number of linear channels, basic HMI, and modest build materials.

Mid-range production-grade linear combination weighers

Price range: approximately USD 20,000 to USD 45,000. These are the most common in food processing plants and provide stronger stainless steel construction, more channels, advanced controls, and integration options for fillers and conveyors.

High-end and custom industrial linear combination weighers

Price range: approximately USD 45,000 to USD 120,000+. High-speed or heavily customized machines with special materials, many channels, servo-driven gates, integrated checkweighers, and full automation packages fall in this range. Costs can exceed USD 120,000 for very complex turnkey systems including packaging machines, robotic case packing, and full line integration.

Key factors that affect linear combination weigher price

When comparing quotes, separate core machine cost from optional extras. The following factors most influence final cost:

Number of channels and throughput requirements

The more weighing channels, the higher the cost. Channel count directly affects speed, combination possibilities, and accuracy. Machines designed for higher packs per minute will need faster electronics and actuators, raising the price.

Accuracy and target tolerance

Higher accuracy (smaller acceptable giveaway) requires better load cells, precision mechanical parts, and advanced combination algorithms. If your product or regulatory needs demand fine tolerances, expect higher capital cost.

Construction materials and hygiene design

Food-grade 304 or 316 stainless steel, IP-rated electrical cabinets, and sanitary frame designs increase cost but reduce contamination risk and cleaning time. A hygienic design can save money long-term in food processing environments.

Control system and software

Simple PLC controllers cost less, while advanced HMI, recipe management, Ethernet connectivity, and Industry 4.0 features (remote diagnostics, data logging) will increase price. Software licensing and proprietary control systems can be a recurring cost.

Integration and automation options

Adding feed systems, vibratory feeders, conveyors, pouchers, form-fill-seal machines, or checkweighers increases both equipment cost and engineering work. Fully integrated turnkey systems are more expensive but reduce installation time on site.

Customization and special product handling

Products that are sticky, fragile, or irregularly shaped may require custom hoppers, anti-bridging solutions, or gentle discharge systems. Customization drives up design and fabrication expense.

Brand, warranty, and service agreement

Reputable brands invest in R&D, quality assurance, and service networks; their initial price is often higher but can lower lifetime costs through reliability and support. Extended warranty or service contracts add to upfront or annual costs.

Local costs: taxes, shipping, and installation

Import duties, freight for heavy machines, and local installation and commissioning fees are frequently overlooked. Remote-site installation or difficult access increases labor and logistics costs.

Hidden and ongoing costs to consider

Beyond purchase price, plan for these ongoing expenses when calculating total cost of ownership:

Maintenance and spare parts

Periodic calibration, replacement load cells, wear parts (gates, belts, bearings), and electronics are recurring costs. Budget 2–6% of machine value per year for maintenance as a rough guideline, adjusted for machine usage intensity.

Calibration, validation, and regulatory compliance

Food and pharmaceutical lines may require regular calibration certificates, weight validation checks, and documentation. Third-party calibration or on-site technician visits add costs.

Downtime and lost production

Choose a machine with local support and fast-access spare parts to minimize downtime. The cost of lost production often exceeds maintenance spend, making service availability a critical factor.

Operational energy and consumables

Electric power, compressed air (if used), and consumable parts such as belts or lubrication should be included in annual operating budgets.

Training and personnel

Operator and maintenance training, whether provided by the manufacturer or third-party trainers, is an additional cost but critical for achieving best performance and reducing errors.

Estimating ROI for a linear combination weigher

Return on investment depends on increased throughput, reduced giveaway, labor savings, and product quality improvements. Here is a simple, practical ROI example based on conservative, real-world figures.

ROI example: small snack pack line

Assumptions: a line produces 50 g snack packs at 60 packs per minute using manual weighing or an older machine. Product cost per pack is USD 0.12, average giveaway per pack is 3 g (6% overfill). By upgrading to a modern linear combination weigher you reduce giveaway to 1 g (2% overfill) and increase speed to 80 ppm. Machine cost: USD 35,000. Annual operating time: 2,000 hours.

Annual production at 60 ppm: 60 packs/min * 60 min * 2,000 hrs = 7,200,000 packs. Annual product cost saved by reducing giveaway: difference in overfill 2 g * 7,200,000 packs = 14,400 kg saved. At product cost USD 2.40/kg (equivalent to USD 0.12/50 g), savings = 14,400 kg * USD 2.40 = USD 34,560/year. Additional savings from increased throughput and labor reduction can further shorten payback to under 1.5 years in this example.

Note: Each case differs. Use your actual product cost, required uptime, and operational hours for precise ROI calculations.

When to choose a linear combination weigher vs a multihead weigher

Choosing between a linear combination weigher and a traditional circular multihead weigher depends on product type, speed needs, line layout, and budget.

Choose a linear combination weigher when

- The product is fragile, long, or prone to breakage and needs gentler handling.
- You need a compact, inline footprint or a longer dwell time for combination.
- Moderate throughput (typically up to ~150 packs/min depending on product) is sufficient.
- Budget and easier maintenance are priorities.

Choose a multihead weigher when

- Very high throughput is required (many high-speed multihead systems achieve 200–400+ ppm depending on pack).
- Products are free-flowing and benefit from circular distribution and rapid combination.
- Maximum speed and minimal giveaway are the central purchase drivers.

How to get the best price and procurement tips for linear combination weighers

Follow practical steps to secure the best machine at the right total cost of ownership:

Define performance requirements clearly

Provide vendors with target packs per minute, product characteristics, target weight and tolerance, environmental conditions (temperature, washdown), and integration requirements. Clear specs reduce costly customization surprises.

Request itemized quotes and compare TCO

Ask for a breakdown: base machine, options, software, conveyors, installation, training, warranty, and spare parts. Compare total cost of ownership over 3–5 years rather than just initial purchase price.

Verify references and onsite performance

Ask suppliers for reference sites using the same product type. Onsite demonstrations or video of similar product running on a comparable machine are strong indicators of capability.

Negotiate service terms and spare parts availability

Fast local support and reasonable spare parts pricing greatly reduce downtime costs. Consider including a guaranteed response time in the service contract.

Consider financing and leasing options

Leasing or equipment financing can spread capital cost and sometimes offers tax advantages. Compare long-term lease costs to outright purchase considering depreciation and maintenance.

Why choose Kenwei for your linear combination weigher

Kenwei is a manufacturer specializing in multihead weighers, linear weighers, metal detectors, and check weighers. With factory capabilities in design, manufacturing, commissioning, and after-sales, Kenwei provides one-stop automated weighing and packaging solutions. Kenwei machines are built for high speed and high precision and can be customized to fit your production line needs. Located in Guangdong, China, Kenwei focuses on responsive service and global reach. For more details visit https://www.kenweigroup.com/.

Conclusion: balancing cost, performance, and long-term value

Buying a linear combination weigher is not only about the upfront price. Evaluate throughput, accuracy, hygiene design, integration needs, and after-sales support. Typical machine prices range from roughly USD 6,000 for entry units to over USD 120,000 for turnkey, high-speed integrated systems. Plan for maintenance, spare parts, calibration, and potential downtime when calculating the total cost of ownership. With careful specification and vendor selection, a linear combination weigher can deliver fast payback through reduced giveaway, higher throughput, and improved product quality.

Next steps and contact

Prepare a clear specification sheet for suppliers: product details, target speed, tolerances, environmental factors, and integration needs. Request detailed, itemized quotations from at least three vendors and ask for real-case references. If you want help creating a specification or evaluating quotes, contact Kenwei for consultation, demos, and tailored cost estimates.

Frequently Asked Questions

What is the typical delivery lead time for a linear combination weigher?
Typical lead times range from 4 to 16 weeks depending on model complexity, customization, and current production schedules. Simple standard models can ship in 4–8 weeks; customized turnkey systems require longer.

How long is the warranty on a linear combination weigher?
Standard warranties are commonly 12 months from shipment, but many manufacturers offer extended warranties or service contracts for an extra fee. Verify what the warranty covers (electronics, mechanical parts, labor).

Can a linear combination weigher handle fragile or sticky products?
Yes. Linear combination weighers can be designed for fragile or sticky products with gentler feed systems, vibration adjustments, and anti-stick surfaces. Customization may increase cost.

What is the expected accuracy of a linear combination weigher?
Accuracy depends on product and machine settings. Typical photographic accuracy for many dry products is within 0.1% to 1% of the target weight; real-world accuracy depends on product variation and line setup.

Is installation and training included in the cost?
Some vendors include basic installation and operator training in the quote, while others charge separately. Verify inclusion and request detailed descriptions of what is provided.

How much maintenance is required for a linear combination weigher?
Routine maintenance includes cleaning, periodic calibration, checking sensors and gates, and replacing wear parts. Budget roughly 2–6% of the machine value annually for maintenance depending on usage.

Can the machine integrate with existing packers and conveyors?
Yes. Most linear combination weighers are designed to integrate with upstream and downstream equipment. Specify exact machine models and conveyor interfaces to ensure compatibility.

How do I decide between a used and new linear combination weigher?
Used machines reduce upfront cost but may carry higher risk and shorter remaining life. Evaluate machine condition, hours of operation, availability of spare parts, and whether the seller provides refurbishment or warranty. For production-critical lines, new machines often offer better long-term value.