ZONESUN
ZONESUN ZS-MD910K Automatic Checkweigher & Metal Detector with Reject System
ZONESUN ZS-MD910K Automatic Checkweigher & Metal Detector with Reject System
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Description
The ZONESUN ZS-MD910K Automatic Checkweigher & Metal Detector combines dynamic weight inspection, metal detection and automatic rejection in one continuous conveyor system.
It detects underweight, overweight and metal-contaminated products, including compatible ferrous, non-ferrous and stainless-steel contaminants. Non-conforming products are automatically removed by the push-rod reject system, while qualified products continue downstream.
Inspection Process
Product Infeed → Metal Detection → Dynamic Checkweighing → Result Comparison → Automatic Rejection → Qualified Product Output
Technical Specifications
| Model | ZS-MD910K |
|---|---|
| Power Supply | AC 220 V ±10%, 50/60 Hz |
| Rated Power | 0.15 kW |
| Metal Detection Aperture | Approx. 150 mm H × 210 mm W |
| Reference Metal Sensitivity | Fe Φ1.0 mm / Cu Φ1.5 mm / SUS Φ2.0 mm under suitable test conditions |
| Single Product Weight | Up to 3000 g; customization available |
| Reference Weighing Accuracy | Approx. ±0.3 g to ±1 g, depending on product and speed |
| Minimum Division | 0.1 g |
| Conveyor Speed | 20–90 m/min |
| Reference Throughput | Up to 80 pcs/min under suitable conditions |
| Reference Product Size | Less than 280 mm L × 200 mm W; product height must fit the detection aperture |
| Reject Method | Push-rod rejection |
| Product Recipes | Up to 100 preset product programs |
| Air Supply | 0.6–1 MPa, Φ8 mm inlet |
| Machine Material | SUS304 stainless steel |
| Weighing Belt Size | Approx. 400 mm L × 210 mm W |
| Conveyor Direction | Left infeed → right outfeed when facing the machine |
Important performance note: Metal-detection sensitivity varies with product composition, moisture, salt content, temperature, package material, aperture size and conveyor conditions. Checkweigher accuracy also varies with product weight, package dimensions, conveyor speed, vibration and product spacing.





Checkweigher Touchscreen Control
Operators can set target weight, upper and lower tolerance limits, product recipes and operating parameters while monitoring inspection results in real time.

Metal Detector Controller
The independent touchscreen controller allows adjustment of metal-detection sensitivity and inspection settings for different products. Final sensitivity should be confirmed using actual samples and test pieces.

Metal Detection Tunnel
The inspection tunnel is designed to detect compatible ferrous, non-ferrous and stainless-steel contaminants as products pass through the conveyor. Products with metallic or metallized packaging require separate evaluation because the packaging itself can affect detection.

Dynamic Checkweighing
The weighing conveyor measures each product while it is moving and compares the result with the programmed acceptable range. Products that are underweight or overweight can be rejected automatically.

Automatic Reject System
The push-rod reject mechanism removes products that fail the configured metal or weight inspection criteria while allowing qualified products to continue downstream.



Best-Suited Products
The ZS-MD910K is suitable for packaged products that travel stably on a conveyor and fit within the inspection aperture.
Typical applications include:
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Cartons
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Pouches
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Trays
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Bottles
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Other non-metallic packages
Metallized film, aluminum foil, oversized or unstable packages require separate evaluation.
Why Combine Checkweighing & Metal Detection?
The checkweigher verifies package weight, while the metal detector checks for detectable metal contamination. Combining both functions saves space and provides two inspection steps in one system.
Metal Detector vs X-Ray
Metal Detector: Detects ferrous, non-ferrous and stainless-steel contaminants.
X-Ray Inspection: Can detect certain dense foreign objects such as metal, glass, stone and some bone.
If glass or stone detection is required, an X-ray system may be more suitable.
What Affects Detection Sensitivity?
Actual sensitivity depends on product moisture, salt content, temperature, package material, detector aperture and conveyor conditions. Listed Fe / Cu / SUS values should be treated as reference specifications.
Before Ordering
Please provide:
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Product and package dimensions
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Normal weight and tolerance
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Required line speed
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Packaging material
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Target metal-detection sensitivity
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Required reject method
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Conveyor height and spacing
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Compressed-air conditions
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Product samples for testing
Frequently Asked Questions
Can it check both weight and metal contamination?
Yes. It combines dynamic checkweighing and metal detection in one system.
Are Fe 1.0 mm / Cu 1.5 mm / SUS 2.0 mm guaranteed?
No. These are reference values. Actual sensitivity depends on the product and package.
Can it inspect metallized or foil packages?
These materials require separate evaluation and may be better suited to X-ray inspection.
Can it detect glass or stone?
No. A standard metal detector is designed for metallic contaminants.
Can it reject underweight or overweight products?
Yes. Out-of-tolerance products can be automatically rejected.
Can it connect to an existing line?
Yes. Conveyor height, product spacing, speed and control requirements should be confirmed before integration.
Need Help Confirming the Setup?
Send your product dimensions, package material, normal weight, tolerance, line speed and metal-detection requirements for configuration support.
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