■ Product Brief
The AB-Linked Rotary Bottle Checkweigher is an automated weighing solution designed for pharmaceutical bottle filling lines that require accurate net weight inspection. By integrating two checkweighing units, System A for empty bottle tare weight measurement and System B for filled bottle gross weight measurement, the system calculates the actual net weight of the contents through real-time data communication and automatic tare weight compensation.
System A: Empty Bottle Tare Weight Measurement
Before filling, Checkweigher A measures the tare weight of each empty bottle. The measured weight data is associated with the corresponding bottle and transmitted to Checkweigher B in real time. This provides an individual tare weight reference for subsequent net weight calculations, helping account for variations in the weight of empty bottles.
System B: Filled Bottle Gross Weight Measurement and Net Weight Calculation
After the bottles are filled, Checkweigher B measures the gross weight of each filled bottle, including both the bottle and its contents. The control system retrieves the corresponding empty bottle tare weight received from System A and automatically calculates the net product weight using the following formula:
Net Weight = Filled Bottle Gross Weight − Empty Bottle Tare Weight
This method enables the system to evaluate the actual weight of the contents rather than relying solely on the total weight of the filled bottle. It is particularly useful for pharmaceutical applications where bottle weight variations may affect conventional gross-weight inspection.
Automatic Weight Evaluation and Reject Function
The calculated net weight is compared with the configured target weight and allowable tolerance limits. Bottles that meet the specified weight criteria continue through the production line, while bottles outside the configured limits are automatically identified and separated by the reject mechanism.
Rotary Bottle Handling and Automated Production Integration
The rotary conveying design supports controlled bottle positioning and sequential weighing, helping maintain an organized inspection process. The AB-linked architecture combines empty bottle weighing, real-time tare data transfer, filled bottle weighing, net weight calculation, and automatic rejection into one coordinated workflow.
■ Technical Data
| Type | SG-ZAB |
| Weighing scope | 2-300g |
| Restrictions of product | Ф10-100 Н:20-200(mm) |
| Accuracy | ±0.01g (Depends on products) |
| Division scale | 0.01g |
| Belt Speed | 0-50m/min |
| Highest speed | 60pcs/min,120pcs/min,180pcs/min(Optional) |
| Chain plate width | 100mm |
| Powder supply | AC220V 50HZ |
| Power | about 800W |
| Main material | SUS304/316 |
| Weight of machine | about 500Kg |
How the SG-ZAB Dual Checkweigher Works
1.Checkweigher A accurately measures the tare weight of each empty bottle.
2.The tare weight data is transmitted to Checkweigher B in real time.
3.After the filling process, Checkweigher B measures the gross weight of the filled bottle.
4.The controller automatically subtracts the tare weight from the gross weight to calculate the precise net product weight.
5.Products outside the preset weight tolerance are automatically identified and rejected.
■ Product Highlights
1. Dual Checkweigher AB Linkage
Two checkweighers operate in tandem—one capturing the tare weight of empty bottles and the other verifying the gross weight after filling—to form a complete net weight inspection process.
2. Real-Time Tare Weight Data Transmission
Checkweigher A transmits empty-bottle tare weight data to Checkweigher B in real time, providing the necessary tare reference for calculating the net weight of each vial.
3. Automatic Net Weight Calculation
The system automatically deducts the empty-bottle tare weight to calculate the net weight of the medication, reducing the operational burden associated with manual calculations and data entry.
4. Configurable Weight Tolerance Control
Target net weights and permissible deviations are set based on product formulations or process requirements, allowing the system to automatically identify products that fall outside the specified range.
5. Automatic Reject System
Vials failing to meet net weight specifications are automatically rejected, minimizing the risk of non-conforming products entering downstream packaging stages.
6. Rotary Bottle Conveying
A rotary conveying structure helps control vial positioning and inspection timing; the specific station layout can be configured according to bottle type and production line requirements.
■ Industry Applications
■ Company Profile
■ Cooperative Clients
■ Exhibition
■ Package & Logistics
● Our machines undergo comprehensive testing and commissioning before shipment to ensure stable and reliable performance.
● Equipment is packaged in thickened wooden crates with shock and moisture-proof interiors to effectively prevent damage during transportation.
● We partner with several professional international logistics companies and support a variety of shipping methods, including sea, air, and land transport.
● Ensure the equipment arrives safely and on time at your facility.
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