This Eight-Head Linear Weighing Scale is a high-capacity precision automatic dosing system engineered for high-accuracy quantitative weighing of free-flowing granular materials in food processing, agricultural production, and industrial packaging applications. This eight-head linear weigher delivers consistent weighing accuracy of ±0.1-0.3g across fill weights from 5g to 5,000g, processing 40-80 weighments per minute depending on target weight and granule flow characteristics. Designed for medium to large-scale manufacturers requiring high-throughput automated weighing solutions for sugar, salt, rice, seeds, coffee, nuts, and granulated ingredients in vertical form-fill-seal packaging lines, premade pouch filling systems, and high-speed container dosing operations.
Product Overview
The Eight-Head Linear Scale operates through an advanced eight-bucket linear configuration where granular material flows from a central supply hopper through electromagnetic vibratory feeders into eight independent weighing buckets arranged in a straight-line layout. Each weighing bucket incorporates a dedicated high-precision load cell sensor providing real-time weight monitoring, with the integrated PLC control system calculating optimal bucket combinations from multiple weighing possibilities to achieve target weight with minimal deviation. This high-capacity linear weighing design provides superior combination options compared to four-head or six-head systems, enabling faster weighing cycles and tighter weight tolerances for consistent free-flowing granular materials including granulated sugar, rice grains, coffee beans, nuts, and uniform-sized seeds in medium to large production volumes.
The advanced modular control system integrates variable-frequency vibratory feeders with automatic amplitude adjustment, enabling precise granule flow optimization from bulk hopper to weighing buckets without manual calibration. The stepless feeding mode continuously modulates vibration intensity based on real-time bucket weight feedback, preventing granule overflow while maintaining optimal filling speed for maximum throughput efficiency. This intelligent feeding control ensures consistent weighing performance across granular materials with varying bulk densities, particle sizes, and flow characteristics, from fine granules like sugar and salt to coarse granules like rice, beans, nuts, and pet food kibble, adapting to material variations without operator intervention.
Unlike traditional volumetric filling systems that vary with granule density changes, this gravimetric weighing scale delivers precise weight-based dosing ensuring regulatory compliance for net weight declarations on food packaging, agricultural seed specifications, and industrial product requirements. The food-grade stainless steel 304 construction throughout material contact areas meets FDA food-contact requirements, GMP standards, and sanitary design principles for easy cleaning and contamination prevention. The quick-release bucket design enables tool-free disassembly for washdown cleaning between production runs, supporting allergen control protocols in multi-product food facilities processing tree nuts, wheat, and dairy ingredients, and cross-contamination prevention in pharmaceutical and nutraceutical packaging operations.
Technical Specifications
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Number of Weighing Heads: 8 independent linear buckets with dedicated load cells
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Weighing Range: 5g to 5,000g per discharge (customizable for specific applications)
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Weighing Accuracy: ±0.1g to ±0.3g (dependent on target weight and granule characteristics)
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Weighing Speed: 40-80 weighments per minute (dependent on target weight and granule flow)
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Material Compatibility: Free-flowing granules (particle size 0.2mm to 20mm)
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Hopper Capacity: 50-80 liters (dependent on granule bulk density)
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Load Cell Type: High-precision digital load cells with temperature compensation
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Control System: PLC with touchscreen HMI, recipe storage for multiple products
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Feeding System: Variable-frequency electromagnetic vibratory feeders with automatic amplitude adjustment
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Power Supply: 220V/380V AC, 50/60Hz, 3-phase
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Power Consumption: 1.5-2.5kW (dependent on configuration and operation mode)
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Air Pressure: 0.5-0.7 MPa (5-7 bar) for pneumatic gate option
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Air Consumption: 30-60 NL/min (with pneumatic gate operation)
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Material Construction: Stainless steel 304 (food contact), stainless steel 201/carbon steel (frame)
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Dimensions: 1,600mm × 900mm × 1,800mm (L × W × H, configuration-dependent)
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Weight: 280-380kg (dependent on configuration and material options)
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Operating Temperature: 0°C to 40°C (32°F to 104°F)
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Protection Rating: IP54 standard, IP65 available for washdown environments
Key Features and Machine Characteristics
Advanced Modular Control System with Automatic Amplitude Adjustment
The highly integrated modular PLC control system with color touchscreen interface enables recipe storage for different granular products and target weights, allowing rapid changeover between production runs of sugar, rice, coffee, nuts, and other granular materials with saved weighing parameters and vibration settings. The automatic amplitude adjustment function continuously optimizes vibratory feeder intensity based on real-time granule flow rates and bucket fill levels, eliminating manual tuning requirements and reducing setup time from 40 minutes to 5 minutes when changing between granular products with different flow characteristics. This intelligent automation reduces operator skill requirements, minimizes weighing errors, and supports efficient multi-product manufacturing in food packaging facilities, agricultural processing operations, and industrial dosing applications requiring frequent product changes throughout production shifts.
High-Precision Weighing with Eight Dedicated Load Cell Sensors
Each of the eight weighing buckets features a dedicated high-precision digital load cell with temperature compensation and vibration filtering, delivering weighing accuracy of ±0.1g for small fill weights (5-100g) and ±0.3g for larger fills (1,000-5,000g). This precision gravimetric dosing ensures consistent net weight compliance meeting regulatory requirements for food labeling accuracy, agricultural seed specifications, and industrial product declarations while minimizing product giveaway that reduces profitability in high-volume packaging operations processing premium coffee, specialty nuts, and high-value granulated ingredients. The digital load cells provide superior stability compared to analog sensors, maintaining calibration accuracy across temperature variations and mechanical vibrations in demanding production environments.
Dual-Material Weighing Capability for Granule Blends
The advanced control system supports simultaneous weighing of two different granular materials through split-hopper configuration with independent feeding channels, enabling automated blending applications such as sugar-salt mixtures for seasoning granules, rice-grain combinations for multi-grain products, nut-seed blends for trail mixes, and coffee-chicory blends for specialty beverages. This dual-material capability eliminates separate weighing and mixing operations, reducing equipment investment and production floor space while improving blend consistency through precise ratio control. The system maintains independent weight targets for each granular material component, ensuring accurate formulation ratios for food products requiring specific ingredient proportions, snack mixes with precise component ratios, and specialty granule blends with exact specifications.
Stepless Feeding Mode with Real-Time Granule Flow Control
The variable-frequency vibratory feeding system with stepless amplitude adjustment provides continuous flow control from gentle trickle feeding for final weight approach to rapid bulk feeding for initial bucket filling. This intelligent feeding strategy achieves optimal balance between weighing speed and accuracy, completing weighing cycles in 0.75-1.5 seconds while maintaining tight weight tolerances. The real-time flow control prevents granule overflow, reduces product spillage, and minimizes cleaning requirements compared to fixed-amplitude feeders that cause bucket overfilling and granule waste. This precise feeding control is particularly valuable for expensive granular ingredients including premium coffee beans, specialty nuts, and high-value seeds where product loss directly impacts production costs and profitability.
Food-Grade Stainless Steel Construction with Sanitary Design
The complete stainless steel 304 construction throughout material contact areas including hoppers, vibratory trays, weighing buckets, and discharge chutes ensures chemical compatibility with acidic granulated seasonings, alkaline food additives, and specialty granular ingredients while meeting FDA 21 CFR 177 food-contact material requirements and GMP standards. The sanitary design features including crevice-free welding, sloped surfaces for complete drainage, and polished finishes preventing granule buildup enable thorough cleaning between production runs, supporting allergen control protocols in facilities processing tree nuts, peanuts, wheat, and dairy-containing granules. The quick-release bucket design with tool-free disassembly allows complete washdown cleaning in 20-25 minutes, minimizing changeover time in multi-product packaging operations.
Optional Pneumatic Gate for Enhanced Small-Dose Granule Accuracy
The optional pneumatic gate system installed at vibratory tray outlets provides on-off flow control based on bucket weight feedback, enabling precise final weight approach for small fill weights (5-50g) where continuous vibration feeding may cause weight overshoot with fine granular materials. The pneumatic gate opens for bulk granule feeding until approaching target weight, then closes for controlled trickle feeding through residual granules in the vibratory tray, achieving ±0.1g accuracy for small-dose applications including specialty seeds, expensive granulated ingredients, and premium coffee portions. This enhanced accuracy capability reduces product giveaway by 0.3-0.8% compared to continuous feeding systems, generating significant cost savings in high-volume operations packaging premium granular ingredients with values exceeding $100/kg.
High-Capacity Linear Design for Large-Scale Production
The eight-bucket linear arrangement provides maximum combination options for achieving target weights, enabling faster weighing cycles of 40-80 weighments per minute compared to four-head or six-head systems. The extended 1,600mm length footprint accommodates larger production volumes while maintaining the straight-line configuration that simplifies integration with high-speed vertical form-fill-seal machines, premade pouch fillers, and automated container filling systems through direct granule discharge without complex chute routing. The modular design enables future capacity expansion through integration with secondary packaging equipment including checkweighers, metal detectors, X-ray inspection systems, and case packers, protecting capital investment and supporting business growth in expanding food brands and scaling agricultural operations.
Application Areas
Sugar and Sweetener Packaging for Large-Scale Production
Large food manufacturers utilize this granule weighing machine for white sugar packaging in retail bags from 250g to 5kg, brown sugar dosing in consumer and foodservice packages, and specialty sweetener filling including coconut sugar granules, stevia granules, and monk fruit sweetener in premium packaging. The system handles granulated sugar with particle sizes from 0.3mm to 2mm, maintaining ±0.2g accuracy at 1kg fill weight while processing 60-70 bags per minute in high-speed vertical form-fill-seal operations. The stainless steel construction prevents sugar caramelization and contamination while the quick-clean design supports frequent washdown in facilities processing multiple granulated sweetener varieties for retail grocery, foodservice distribution, industrial ingredient supply, and export markets.
Rice and Grain Weighing for Commercial Production
Rice processors and grain packagers deploy this linear weighing scale for white rice packaging in consumer bags from 500g to 10kg, specialty rice dosing including basmati, jasmine, and arborio varieties in premium packaging, and multi-grain blend weighing combining rice, quinoa, barley, and ancient grains in health food products. The system accommodates rice grain lengths from 4mm short-grain to 8mm long-grain varieties, maintaining consistent fill weights across high-volume production runs while the gentle vibratory feeding prevents grain breakage that reduces product quality. The dual-material capability enables automated rice-seasoning blend packaging for flavored rice products and rice-lentil combinations for ready-to-cook meal kits serving retail consumer, foodservice, ethnic food markets, and international export channels.
Coffee Bean and Roasted Coffee Dosing for Commercial Roasters
Commercial coffee roasters employ this weighing system for whole bean coffee packaging in retail bags from 250g to 2kg, ground coffee dosing in various grind sizes from espresso to French press, and specialty coffee portioning for single-serve pods, capsule filling operations, and bulk foodservice packaging. The system handles coffee beans with sizes from 6mm to 12mm, maintaining ±0.2g accuracy for premium single-origin coffees while the stainless steel construction prevents flavor contamination between different roast profiles and origin varieties. The recipe storage capability enables rapid changeover between light, medium, and dark roasts with different bulk densities, supporting efficient multi-product operations in commercial coffee roasting facilities, contract coffee packaging operations, and private-label coffee production serving retail grocery, coffee shop wholesale, foodservice distribution, and international export markets.
Nut and Seed Packaging for Snack Food Production
Snack food manufacturers utilize this multi-head weigher for roasted nut packaging including almonds, cashews, peanuts, and mixed nuts in retail bags from 100g to 1kg, seed dosing for sunflower seeds, pumpkin seeds, and specialty seed products, and nut-seed blend weighing for trail mixes and healthy snack combinations. The system handles nut pieces with sizes from 5mm chopped nuts to 20mm whole nuts, maintaining ±0.3g accuracy while processing 50-70 bags per minute in high-speed packaging operations. The dual-material weighing enables automated creation of complex nut-seed blends with precise component ratios for nutritional consistency, supporting allergen control protocols in facilities processing tree nuts, peanuts, and seed products for retail grocery, health food stores, foodservice distribution, and vending machine supply channels.
Pet Food Kibble and Treat Packaging for Commercial Production
Pet food manufacturers deploy this weighing scale for dry pet food kibble packaging in retail bags from 500g to 5kg, pet treat dosing for specialty animal snacks and training rewards, and small animal feed portioning for rabbit, hamster, and bird food granules in consumer packaging. The system handles pet food kibble with sizes from 5mm small-breed formulations to 20mm large-breed chunks, maintaining accurate fill weights for consumer satisfaction while the robust construction withstands continuous operation in demanding pet food production environments. The recipe storage enables rapid changeover between different pet food formulations including puppy, adult, and senior varieties with varying kibble sizes and densities, serving retail pet stores, veterinary clinics, pet specialty chains, and e-commerce distribution channels.
Agricultural Seed Packaging for Commercial Distribution
Agricultural seed suppliers utilize this linear scale for vegetable seed packaging including corn, soybean, wheat, and specialty crop seeds in commercial planting packages from 100g to 5kg, flower seed dosing for professional landscaping and agricultural distribution, and cover crop seed portioning for farming operations and agricultural cooperatives. The system handles seed sizes from 2mm small vegetable seeds to 15mm large bean seeds, maintaining accurate fill weights for regulatory compliance and customer satisfaction while the gentle handling prevents seed damage that affects germination rates and crop performance. The stainless steel construction withstands agricultural environment conditions while the high-capacity design supports large-volume seed packaging operations serving commercial farming operations, agricultural cooperatives, professional landscaping companies, and international seed export markets.
Granulated Seasoning and Spice Blend Production
Spice manufacturers and seasoning producers utilize this automatic weighing system for granulated seasoning packaging including garlic granules, onion granules, and specialty seasoning blends in retail jars and pouches from 50g to 1kg, spice blend dosing for proprietary formulations and ethnic spice mixtures, and bulk seasoning portioning for foodservice and industrial food ingredient applications. The system handles seasoning granules with particle sizes from 0.5mm to 5mm, maintaining ±0.2g accuracy for expensive specialty seasonings while the dual-material weighing enables automated creation of complex seasoning blends with precise ingredient ratios. The food-grade construction and quick-clean design support allergen control protocols in facilities processing multiple granulated seasoning varieties including mustard, celery, and sesame-containing products for retail grocery, foodservice distribution, industrial food manufacturing, and export markets.
Breakfast Cereal and Granola Packaging for Food Manufacturing
Cereal manufacturers and granola producers employ this weighing scale for breakfast cereal packaging including corn flakes, wheat flakes, and multi-grain cereals in retail boxes from 250g to 1kg, granola dosing for health food products and breakfast items, and cereal blend weighing for mixed grain products and specialty breakfast formulations. The system handles cereal pieces with sizes from 3mm granola clusters to 15mm cereal flakes, maintaining consistent fill weights while the gentle handling prevents product breakage that affects consumer appeal. The high-speed operation processes 60-80 packages per minute, supporting large-volume cereal production in food manufacturing facilities serving retail grocery, health food stores, foodservice distribution, and international export markets.
