This Four-Head Linear Weighing Scale is a compact automatic dosing system engineered for high-accuracy quantitative weighing of uniform free-flowing granular materials in food packaging, pharmaceutical production, and chemical processing applications. This quadruple-head linear weigher delivers consistent weighing accuracy of ±0.2-0.8g across fill weights from 20g to 2,000g, processing 25-50 weighments per minute depending on target weight and material flow characteristics. Designed for small to medium-scale manufacturers requiring cost-effective automated weighing solutions for sugar, salt, rice, seeds, coffee, and granulated ingredients in vertical form-fill-seal packaging lines, sachet filling systems, and container dosing operations.
Product Overview
The Quadruple-Head Linear Scale operates through a streamlined four-bucket linear configuration where material flows from a central supply hopper through electromagnetic vibratory feeders into four 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 selecting optimal bucket combinations to achieve target weight with minimal deviation. This compact linear weighing design provides an economical entry point for automated weighing compared to larger multi-head combination weighers, while maintaining reliable accuracy for consistent free-flowing granular materials including granulated sugar, rice grains, coffee beans, and uniform-sized seeds in small to medium production volumes.
The advanced modular control system features variable-frequency vibratory feeders with automatic amplitude adjustment, enabling precise material 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 material 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 to coarse granules like rice, beans, and pet food kibble, adapting to material variations without operator intervention.
The innovative free-fall rapid feeding system accelerates initial bucket filling compared to traditional continuous vibratory feeding, reducing cycle time by 20-30% while maintaining weighing accuracy through precision vibratory tray feeding for final weight approach. This hybrid feeding strategy combines speed and accuracy, achieving complete weighing cycles in 1.2-2.4 seconds depending on target weight and material characteristics. Unlike volumetric cup fillers that vary with material density fluctuations, this gravimetric weighing scale delivers precise weight-based dosing ensuring regulatory compliance for net weight declarations on food packaging, pharmaceutical dosing accuracy requirements, and chemical product specifications across production batches.
The food-grade stainless steel 304 construction throughout material contact areas meets FDA food-contact material requirements, GMP pharmaceutical standards, and sanitary design principles for contamination prevention and easy cleaning. The quick-release bucket design with tool-free disassembly enables complete washdown cleaning in 10-15 minutes 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 packaging operations handling different active ingredients.
Technical Specifications
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Number of Weighing Heads: 4 independent linear buckets with dedicated load cells
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Weighing Range: 20g to 2,000g per discharge (customizable for specific applications)
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Weighing Accuracy: ±0.2g to ±0.8g (dependent on target weight and material characteristics)
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Weighing Speed: 25-50 weighments per minute (dependent on target weight and material flow)
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Material Compatibility: Free-flowing uniform granules (particle size 0.3mm to 12mm)
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Hopper Capacity: 20-35 liters (dependent on material 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: Free-fall rapid feeding + variable-frequency vibratory tray for precision approach
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Power Supply: 220V AC, 50/60Hz, single-phase
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Power Consumption: 0.5-1.0kW (dependent on operation mode)
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Air Pressure: Not required (fully electric operation)
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Material Construction: Stainless steel 304 (food contact), stainless steel 201 (frame)
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Dimensions: 900mm × 700mm × 1,500mm (L × W × H, configuration-dependent)
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Weight: 120-180kg (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
Integrated Modular Control System with Automatic Amplitude Adjustment
The highly integrated modular PLC control system with intuitive touchscreen interface enables recipe storage for different products and target weights, allowing rapid changeover between production runs of sugar, rice, coffee, 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 material flow rates and bucket fill levels, eliminating manual tuning requirements and reducing setup time from 20 minutes to 3 minutes when changing between 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, contract packaging operations, and pharmaceutical dosing applications requiring frequent product changes throughout production shifts.
Free-Fall Rapid Feeding for Increased Throughput
The innovative free-fall rapid feeding system accelerates initial bucket filling by allowing material to drop directly from the supply hopper into weighing buckets through gravity-assisted flow, reducing filling time by 20-30% compared to continuous vibratory feeding throughout the entire weighing cycle. Once approaching target weight, the system transitions to precision vibratory tray feeding for controlled final weight approach, achieving optimal balance between speed and accuracy. This hybrid feeding strategy enables higher throughput rates of 40-50 weighments per minute for medium fill weights (200-500g) while maintaining tight weight tolerances, improving production efficiency in high-volume packaging operations processing sugar, rice, and coffee for retail consumer markets.
Multi-Material Simultaneous Weighing Capability
The advanced control system supports simultaneous weighing of multiple different materials through split-hopper configuration with independent feeding channels, enabling automated blending applications such as sugar-salt mixtures for seasoning blends, rice-grain combinations for multi-grain products, and coffee-chicory blends for specialty beverages. This multi-material capability eliminates separate weighing and mixing operations, reducing equipment investment by 40-50% compared to dedicated weighing systems for each ingredient while improving blend consistency through precise ratio control. The system maintains independent weight targets for each material component, ensuring accurate formulation ratios for food products requiring specific ingredient proportions, pharmaceutical blends with active-excipient ratios, and chemical mixtures with precise component specifications.
Stepless Vibrating Feeder System for Uniform Material Distribution
The variable-frequency electromagnetic vibratory feeding system with stepless amplitude adjustment provides continuous flow control from gentle trickle feeding for final weight approach to moderate bulk feeding for initial bucket filling. This stepless feeding capability ensures uniform material distribution across all four weighing buckets, preventing uneven loading that causes weighing delays and accuracy variations. The real-time flow control prevents material overflow, reduces product spillage by 60-70% compared to fixed-amplitude feeders, and minimizes cleaning requirements in production environments. This precise feeding control is particularly valuable for expensive ingredients including premium coffee beans and specialty granulated ingredients where product loss directly impacts production costs and profitability.
Food-Grade Stainless Steel Construction with Quick-Clean Design
The complete stainless steel 304 construction throughout material contact areas including supply hopper, vibratory trays, weighing buckets, and discharge chutes ensures chemical compatibility with acidic seasonings, alkaline food additives, and pharmaceutical ingredients while meeting FDA 21 CFR 177 food-contact material requirements and GMP pharmaceutical manufacturing standards. The sanitary design features including crevice-free welding, sloped surfaces for complete drainage, and polished finishes preventing material buildup enable thorough cleaning between production runs. The quick-release bucket design with tool-free disassembly allows complete washdown cleaning in 10-15 minutes, minimizing changeover time in multi-product packaging operations processing different food varieties, pharmaceutical formulations, and chemical products requiring contamination prevention.
Compact Footprint for Space-Constrained Facilities
The four-bucket linear arrangement provides an ultra-compact 900mm length footprint, making this scale ideal for small production facilities with limited floor space, startup operations with budget constraints, and retrofit installations in existing packaging lines where larger combination weighers cannot fit. The straight-line configuration simplifies integration with vertical form-fill-seal machines, sachet filling systems, and container dosing equipment through direct product discharge without complex chute routing. The compact design reduces installation costs by 30-40% compared to larger multi-head systems while providing reliable automated weighing performance for small to medium production volumes of 1,000-3,000 packages per hour.
Cost-Effective Entry-Level Automation Solution
The four-head configuration provides an economical entry point for automated weighing at 40-50% lower capital investment compared to 10-14 head combination weighers, making precision gravimetric dosing accessible for small manufacturers, startup food brands, and contract packaging operations with limited budgets. Despite the lower initial cost, the system delivers reliable weighing accuracy of ±0.2-0.8g suitable for most food packaging, pharmaceutical dosing, and chemical portioning applications. The modular design enables future capacity expansion through upgrade to six-head or eight-head configurations as production volumes grow, protecting initial capital investment and supporting business scaling without complete equipment replacement.
Application Areas
Sugar and Sweetener Packaging for Retail Markets
Small to medium food manufacturers utilize this granule weighing machine for white sugar packaging in retail bags from 500g to 2kg, brown sugar dosing in consumer packages, and specialty sweetener filling including coconut sugar, stevia granules, and monk fruit sweetener in premium packaging. The system handles granulated sugar with particle sizes from 0.4mm to 2mm, maintaining ±0.5g accuracy at 1kg fill weight while processing 35-45 bags per minute in 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 sweetener varieties for retail grocery, health food stores, and specialty food distribution markets.
Rice and Grain Weighing for Small-Scale Producers
Rice processors and grain packagers deploy this linear weighing scale for white rice packaging in consumer bags from 1kg to 5kg, specialty rice dosing including basmati, jasmine, and arborio varieties in premium packaging, and ancient grain portioning including quinoa, amaranth, and millet in health food products. The system accommodates rice grain lengths from 5mm short-grain to 8mm long-grain varieties, maintaining consistent fill weights across production runs while the gentle vibratory feeding prevents grain breakage that reduces product quality and consumer appeal. The compact footprint fits small rice milling facilities and grain packaging operations with limited production floor space, serving retail consumer, ethnic food markets, and health food distribution channels.
Coffee Bean and Ground Coffee Dosing for Specialty Roasters
Specialty coffee roasters and small-scale coffee packagers employ this weighing system for whole bean coffee packaging in retail bags from 250g to 1kg, ground coffee dosing in various grind sizes from espresso to French press, and single-origin coffee portioning for premium packaging and subscription box services. The system handles coffee beans with sizes from 7mm to 12mm, maintaining ±0.5g 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 specialty coffee roasting facilities serving retail grocery, coffee shop wholesale, and direct-to-consumer subscription markets.
Seed Packaging for Garden Centers and Agricultural Suppliers
Agricultural seed suppliers and garden product distributors utilize this linear scale for vegetable seed packaging including tomato, pepper, and lettuce seeds in retail packets from 25g to 100g, flower seed dosing for garden center distribution, and herb seed portioning for culinary gardening kits and urban farming applications. The system handles seed sizes from 2mm small vegetable seeds to 10mm 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 compact design fits seed packaging facilities with limited floor space, serving retail garden centers, agricultural cooperatives, and online gardening supply distribution channels.
Snack Food and Trail Mix Packaging for Emerging Brands
Snack food startups and small-scale manufacturers employ this automatic weighing system for granular snack packaging including roasted nuts, dried fruits, and granola in retail bags from 150g to 500g, trail mix dosing combining multiple ingredients in single packages, and healthy snack portioning for subscription box services and direct-to-consumer brands. The system handles snack pieces with sizes from 4mm dried fruit pieces to 12mm whole nuts, maintaining consistent fill weights while the multi-material capability enables automated creation of mixed snack products with precise component ratios for nutritional consistency. The food-grade construction and easy-clean design support frequent product changes in facilities producing multiple snack varieties for retail grocery, health food stores, and e-commerce distribution channels.
Pet Treat and Small Animal Feed Dosing
Pet food manufacturers and animal nutrition suppliers utilize this weighing scale for pet treat packaging in retail bags from 100g to 500g, training reward dosing for specialty animal snacks, and small animal feed portioning for hamster, rabbit, and bird food products in consumer packaging. The system handles pet treat pieces with sizes from 5mm small training treats to 12mm larger reward snacks, maintaining accurate fill weights for consumer satisfaction while the robust construction withstands continuous operation in pet food production environments. The recipe storage enables rapid changeover between different pet treat formulations including chicken, beef, and fish varieties with varying piece sizes and densities, serving retail pet stores, veterinary clinics, and pet specialty e-commerce distribution channels.
