High-Precision Checkweigher for Efficient Product Weight Sorting

A checkweigher machine is an essential piece of equipment for modern production lines, designed to automatically sort products based on weight. Widely used in the food, pharmaceutical, aquatic products, and poultry industries, it replaces manual weighing, significantly improving production efficiency, ensuring accuracy, reducing labor requirements, and lowering costs.

How a Checkweigher Works

The industrial weight sorting system operates through a coordinated process involving the weight sensor, AD module, PLC (Programmable Logic Controller), and sorting mechanism:

1. Weight Detection – The weight sensor converts product weight into an analog voltage signal.

2. Signal Conversion – The AD module transforms this signal into digital weight data, representing the real-time weight of the product on the conveyor belt.

3. Data Processing – The PLC reads and analyzes this data, calculating the product’s actual weight as it moves across the weighing belt.

4. Sorting Decision – If the product is outside the preset weight range, the PLC triggers the reverse belt action, automatically removing non-compliant items.

Applications

Kenwei’s online weight checking machines are suitable for a wide range of packaging formats, including:

• Bulk paper bags

• Plastic packaging

• Carton boxes

• Metal film packaging

They ensure high-speed, high-precision operation in stable working conditions.

Key Features

• High Accuracy & Speed – Delivers precise weighing results at rapid throughput.

• LAN & Serial Communication – Optional RS232 or RS485 connectivity for seamless integration.

• Data Export Function – USB port allows export of package weight records and production logs.

• User-Friendly Operation – Intuitive touch screen for easy parameter setting.

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Structural Components

The basic structure of the checkweigher includes:

1. Electric Box – Houses the PLC for data processing and motor control.

2. Weighing Belt – Equipped with a weight sensor and AD module for accurate measurement.

3. Material Receiving Plate – Buffers product impact and guides it onto the weighing belt.

4. Touch Screen Interface – Simplifies operation and real-time monitoring.

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Why Choose Kenwei’s Checkweigher

Kenwei’s checkweighers combine fast detection, high measurement accuracy, and scalable performance, offering cost-effective solutions for inline weight inspection and product sorting in various industries.