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CW500 Checkweigher: Precision Weight Control for Large-Packaged Food & Pet Care Products

SW500 Checkweigher

SW500 Checkweigher: Precision Weight Control for Large-Packaged Food & Pet Care Products

 
For manufacturers of large-packaged food, pet care, and industrial goods, accurate weight control is critical to meeting regulatory standards, reducing material waste, and protecting brand integrity. Even minor underfills or overfills in bulk packages can lead to costly penalties, customer complaints, and eroded market trust. PetNutra Europe, a leading producer of premium dry pet food in Germany, turned to Shanghai Fanchi-tech Machinery Co., Ltd. to solve its weight inspection challenges. By deploying our SW500 Checkweigher, PetNutra eliminated weight variation risks, cut waste, and secured long-term compliance with EU food safety regulations.
 

 

The Challenge: Weight Inconsistency & Production Bottlenecks in Bulk Packaging

 
PetNutra Europe produces over 30,000 large-packaged pet food items daily, including 10kg dry dog food bags, 15kg cat food sacks, and 20kg livestock feed pouches. In early 2025, a batch of 10kg dog food bags was found to have an average underfill of 80g, triggering a warning from the German Federal Office of Consumer Protection and Food Safety (BVL) and a temporary production halt. The company’s legacy checkweighing system exposed critical flaws:
 

  • Insufficient Precision: The old checkweigher had a measurement tolerance of ±10g, failing to detect the 80g underfill in 10kg bulk bags, which violated EU weight labeling regulations.
  • Unstable Conveying: Large, bulky bags frequently tipped or jammed on the old system’s narrow belt, leading to a 12% false reject rate—wasting 3,600 qualified bags weekly.
  • Slow SKU Switching: Manual calibration between different bag sizes (10kg, 15kg, 20kg) slowed production by 25% during peak demand periods.
  • Hygiene Gaps: The old machine’s crevice-ridden design trapped pet food residues, creating bacterial growth risks and failing BRCGS audits.

 
“Our bulk pet food packages are our core product line, but weight inconsistency and production inefficiencies were threatening our business,” says Markus Weber, Quality Director at PetNutra Europe. “We needed a robust, precise checkweigher built to handle large, heavy packages without compromising speed or hygiene.”
 

 

The Solution: Fanchi-tech SW500 Checkweigher for Bulk Packaging

 
After evaluating 8 competitors, PetNutra selected the SW500 Checkweigher for its heavy-duty construction, high precision, and stability for large packages. As shown in our factory photos, the SW500 features a 304 stainless steel frame, wide green wear-resistant conveyor belt, touch-screen intelligent inspection panel, emergency stop button, and sturdy adjustable support legs—all engineered for bulk food and pet care production lines.
 

1. High-Precision Weighing for Bulk Packages

 
The SW500 uses industrial-grade load cells and advanced signal processing to deliver measurement accuracy of ±0.5g, even for 20kg bulk packages. Key capabilities:
 

  • Underfill/Overfill Detection: Identifies deviations as small as 5g in 10–20kg packages, ensuring full compliance with EU Regulation (EU) 2019/1020 on weighing and measuring instruments.
  • High-Speed Operation: Processes up to 120 bulk packages per minute, matching PetNutra’s packaging line speed.
  • Adaptive Calibration: Automatically adjusts to different package weights and materials (multi-layer plastic, woven sacks), eliminating manual calibration between SKUs.

 
During on-site validation, the SW500 detected 100% of test underfill and overfill conditions in 10kg, 15kg, and 20kg pet food bags.
 

2. Stable Conveying for Large, Bulky Packages

 
The SW500’s wide green conveyor belt and robust guide rails are designed to handle large, heavy packages without tipping or jamming:
 

  • Wide Belt Design: 500mm belt width accommodates bulk bags up to 20kg, preventing shifting during weighing.
  • Shock-Absorbing Structure: Sturdy stainless steel support legs and anti-vibration mounts ensure stable weighing, even for heavy, unevenly distributed packages.
  • Gentle Reject Mechanism: Pneumatic reject arms gently remove non-conforming bags from the line without tearing or spilling, reducing waste by 35%.

 

3. Hygienic Design & Intelligent Operation

 
The SW500’s crevice-free 304 stainless steel construction supports daily high-pressure washdowns, while its wear-resistant green belt resists pet food residue buildup. Key features:
 

  • Easy-to-Clean Surfaces: Seamless stainless steel surfaces eliminate hidden crevices, reducing cleaning time by 40% and minimizing bacterial growth risks.
  • Fast SKU Switching: The touch-screen intelligent inspection panel stores 60+ product presets, enabling SKU switching in 20 seconds—down from 20 minutes with manual calibration.
  • Audit-Ready Traceability: Logs 1,000,000+ weight records, including time-stamps and batch numbers, for BRCGS and regulatory audits.

 

 

The Outcome: Zero Regulatory Penalties & 20% Faster Production

 
In the 12 months since deploying 5 SW500 Checkweighers:
 

  • 52 Critical Underfill/Overfill Incidents Intercepted: Detected deviations as small as 5g in bulk pet food bags, preventing 4 potential regulatory penalties and €85,000 in estimated recall costs.
  • 94% Reduction in False Rejects: Weekly bag waste dropped from 3,600 to 216, saving €2,800 monthly in material and labor costs.
  • 20% Faster Production: Fast SKU switching and stable conveying increased line efficiency, adding 14 hours of weekly capacity during peak holiday demand.
  • 100% Audit Compliance: Passed all BRCGS and BVL inspections with zero non-conformities, securing a 5-year contract extension with its largest European retail partner.

 
“The SW500 didn’t just fix our weight control problem—it transformed our bulk packaging operations,” says Weber. “We now have complete confidence that every large bag leaving our facility is accurate, compliant, and safe for pets and their owners.”
 

 

Why Fanchi-tech’s SW500 Leads in Bulk Packaging Checkweighing

 
For large-packaged food, pet care, and industrial manufacturers, the SW500 Checkweigher delivers:
 

  • Heavy-Duty Precision: ±0.5g measurement tolerance for bulk packages up to 20kg, meeting strict regulatory standards.
  • Stable Conveying: Wide belt and robust structure handle large, bulky packages without tipping or jamming.
  • Hygienic Design: 304 stainless steel and washdown-ready construction meet food safety and pet care hygiene requirements.
  • Intelligent Operation: Fast SKU switching and real-time data logging streamline compliance and production efficiency.

 

 

Secure Your Bulk Packaging Lines Today

 
If you’re a manufacturer of large-packaged food, pet care, or industrial goods facing weight variation risks, regulatory non-compliance, or production bottlenecks, contact Kerry Wang to arrange a free virtual demo or on-site trial of the SW500 Checkweigher. We’ll test the unit with your specific bulk products to validate performance for your line speed and SKU mix.
 
Shanghai Fanchi-tech Machinery Co., Ltd.