A Tablet Sampling Checkweigher is a high-precision, automated quality control device designed for pharmaceutical manufacturing or laboratory research. It automatically or manually extracts representative tablet samples from the production line (usually a tablet press) and weighs them one by one to ensure they meet stringent weight specifications.
Core Uses
● Its primary function is to monitor and ensure dosage accuracy and content uniformity during tablet manufacturing.
● Ensures that each tablet contains the correct dose of the active pharmaceutical ingredient (API).
● Prevents under-dosed (ineffective) or over-dosed (potentially dangerous) tablets from reaching patients.
● Ensures compliance with stringent standards such as GMP, FDA, and USP.
● Complies with FDA 21 CFR Part 11.
How it Works (Process)
● Automatic or Manual Sampling: Directly connected to the tablet press or manually placed. Small, random samples (e.g., 20-100 tablets) are extracted from the continuous production line at preset time intervals (e.g., every 15 minutes).
● High-speed precision weighing: Each tablet is individually separated and fed into a precision weighing unit. This unit measures the weight of each tablet individually with extremely high accuracy (typically ±0.5mg/±1mg).
● Data analysis and comparison: The system compares each weight to preset standards and tolerance ranges. It calculates statistical data such as average weight, standard deviation, and relative standard deviation (RSD).
Sorting and alarms:
● Pass: Passing tablets are returned to the production line.
● Fail: Tablets that are out of specification (overweight/underweight) are automatically rejected and placed in a locked bin.
● Alarm: The system issues an alarm if a batch trend deviates (e.g., a consistently low average weight).
● Complete data logging: The system records all weight data, timestamps, and batch information, and generates reports that meet audit requirements.
Key features:
● Sampling: Static weighing method.
● Weighing range: 5mg – 2000mg (covering almost all tablets and capsules).
● Accuracy: High-precision load cell with a resolution of ±0.5mg/±1mg.
● Speed: 60 pieces/minute.
● User Interface: Intuitive touchscreen HMI for setting parameters and viewing real-time histograms/control charts.
● Construction: Constructed entirely of 316L stainless steel, compliant with GMP standards, and easy to clean.
● Supports multiple communication interfaces including RS-232, RS485, Mudbus-TCP, USB, and Ethernet.
● Simple and easy-to-understand interface; weighing data BOM table function allows for one-click export to USB flash drive for data analysis.
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