Online Checkweigher Parameter JZ-220

Keypack Intelligent JZ-220 Online Checkweigher is engineered for automatic weight detection and rejection on high-speed production lines. It delivers ±0.3g–±0.5g accuracy at up to 80 pcs/min with SUS304 stainless steel construction and a 7-inch color touch screen interface. Ideal for pharmaceutical, food, toy, hardware, and chemical manufacturing environments requiring reliable inline weight inspection.

Product Overview

The JZ-220 is a conveyor-based industrial checkweigher designed to integrate seamlessly into automated assembly lines and logistics delivery systems. Built on an independently developed single-chip microcomputer platform with a proprietary filtering algorithm, the system maintains stable detection performance across varying production conditions. The 7-inch color LCD touch screen provides an intuitive operator interface, while password-protected parameter settings ensure that configuration is managed by authorized personnel only.

The system supports storage of up to 100 product test profiles, enabling fast changeovers between different SKUs without recalibration downtime. An automatic zero-point tracking system continuously compensates for environmental drift, keeping detection data reliable throughout extended production runs. The Keypack Intelligent (kunbupack) JZ-220 Checkweigher is available with either push rejection or arm lever rejection, and an optional three-light alarm for visual line monitoring.

The buckle-type conveyor belt is designed for tool-free disassembly, simplifying cleaning and routine maintenance — a practical advantage for food-grade and pharmaceutical production environments where hygiene compliance is a regular requirement.

Key Features and Machine Characteristics

• High-Accuracy Weight Inspection: ±0.3g–±0.5g mini scale accuracy supports precise upper/lower limit discrimination and weight grading, reducing product inconsistencies on the line.
• Auto-Learning System with Photoelectric Detection: Automatically detects empty bags via photoelectric sensor; the auto-learning system adapts to product characteristics, reducing setup time during changeovers.
• Automatic Zero-Point Tracking: Continuously compensates for environmental and mechanical drift, maintaining reliable detection data throughout long production runs without manual intervention.
• Multi-Product Data Storage (100 Profiles): Stores up to 100 product test configurations, enabling fast and repeatable line changeovers across different SKUs.
• Adjustable Conveyor Belt Speed: Belt speed is adjustable to match upstream and downstream line speeds, supporting flexible integration into existing production layouts.
• Multi-Language Support: Default interface in Chinese and English; additional languages available upon customization request.
• Password-Protected Settings: Parameter configuration is access-controlled, limiting adjustments to authorized management personnel and reducing the risk of operator error.
• Easy Maintenance Design: Buckle-type conveyor belt allows tool-free disassembly for cleaning and maintenance, reducing downtime and supporting hygiene compliance in food and pharmaceutical environments.
• SUS304 Stainless Steel Frame: Durable, corrosion-resistant construction suitable for food-grade and pharmaceutical production conditions.

Application Areas

• Food Industry: Inline weight inspection of packaged snacks, condiments, dairy products, and dry goods on high-speed conveyor lines; detection of underweight or overweight packs before downstream sealing or labeling.
• Pharmaceutical Industry: Weight verification of blister packs, bottled tablets, and pouched powders; supports batch consistency checks and replaces manual sampling on regulated production lines.
• Toy & Hardware: Component count verification by weight for kits, fasteners, and small parts; identifies missing components in sealed retail packaging before shipment.
• Chemical Industry: Weight grading of bagged or bottled chemical products on automated filling lines; supports upper/lower limit rejection for net weight compliance.
• Logistics & E-commerce Fulfillment: Automated weight screening on parcel sorting lines; flags non-conforming packages for review before dispatch.

Checkweigher vs. Multihead Weigher: What’s the Difference?

A multihead weigher and a checkweigher serve different purposes on the same packaging line — one weighs before filling, the other inspects after sealing.

• Multihead Weigher — Positioned before the packaging machine. It precisely measures the target weight of each dose and delivers it to the bagging system. Its job is to determine how much product goes into each package, ensuring accurate fill weights at high speed through combination weighing algorithms.
• Checkweigher — Positioned after the packaging machine. It inspects the finished, sealed package and verifies whether the actual weight falls within the acceptable range. Packages that are overweight, underweight, or missing are automatically rejected. Its job is to verify that the filling and sealing process worked correctly, not to measure the product itself.

In a typical production line, the multihead weigher feeds the VFFS or pouch machine, and the checkweigher sits downstream — after sealing — acting as a quality control gate. Together, they ensure both accurate filling and compliant output, reducing product giveaway and customer complaints.

Simply put: Multihead weighers control the fill. Checkweighers verify the result.

Specifications

Note: Detection speed and accuracy are influenced by the properties of the tested products and the operating environment. Actual performance should be validated through on-site testing.