Labthink C612M Automatic Torque Tester for Caps and Closures
| Brand | Labthink |
|---|---|
| Model | C612M |
| Origin | Shandong, China |
| Manufacturer Type | OEM/ODM Manufacturer |
| Country of Origin | China |
| Torque Sensor Range | 5 N·m (standard) |
| Accuracy | ±0.5% of reading (10–100% FS) |
| Resolution | 0.0001 N·m |
| Cap Holding Diameter | Φ10–Φ80 mm |
| Bottle Body Holding Diameter | Φ5–Φ170 mm |
| Bottle Height Range | 20–400 mm |
| Max Test Torque | 2 N·m (customizable) |
| Air Supply Requirement | 0.7 MPa (101.5 psi), clean dry air (user-supplied) |
| Statistical Batch Size | 0–999 samples |
| Dimensions (L×W×H) | 550 × 365 × 1150 mm |
| Weight | 39 kg |
| Power | 220 VAC ±10%, 50 Hz or 120 VAC ±10%, 60 Hz (dual-voltage compatible) |
Overview
The Labthink C612M Automatic Torque Tester is an industrial-grade, servo-driven rotational torque measurement system engineered for precise quantification of closure application and removal torque in threaded packaging systems. It operates on the principle of controlled angular displacement under calibrated load sensing, utilizing high-fidelity strain-gauge-based torque transducers and closed-loop pneumatic actuation to replicate real-world capping and decapping dynamics. Designed specifically for quality assurance laboratories and production floor validation in food, pharmaceutical, cosmetic, and consumer healthcare industries, the C612M delivers traceable, repeatable, and auditable torque data compliant with international regulatory frameworks governing package integrity and user safety. Its mechanical-hand architecture eliminates operator-dependent variability—ensuring measurement consistency across shifts, operators, and facilities.
Key Features
- Two-mode operation: independent programmable testing for cap application torque (tightening) and cap removal torque (opening), each with fully adjustable rotation speed, target torque setpoint, and dwell time.
- Patented dual-pneumatic gripper system: synchronized bottle-body clamping and cap engagement with force feedback control; clamping force and rotational torque independently regulated to prevent sample slippage or deformation.
- Ultra-high resolution torque sensing: 0.0001 N·m resolution enables reliable detection and quantification of sub-mN·m events—critical for low-torque closures such as pediatric dropper bottles or single-dose ophthalmic vials.
- Auto-zeroing, overload protection, and real-time fault diagnostics integrated into firmware; automatic sensor recalibration prompt upon power-up or after extended idle periods.
- Industrial 7-inch capacitive touchscreen interface with multi-level user authentication (administrator, technician, operator), audit trail logging, and configurable password policies aligned with FDA 21 CFR Part 11 Annex 11 requirements.
- Real-time torque vs. angle curve visualization during test execution; peak torque auto-capture with configurable hold duration and post-peak decay analysis.
- Onboard non-volatile memory stores up to 1,200 test records with timestamp, operator ID, sample ID, test mode, and raw curve metadata; supports USB mass storage export in CSV and PDF formats.
Sample Compatibility & Compliance
The C612M accommodates a broad spectrum of threaded closure geometries—including screw caps, flip-top caps, child-resistant closures, and pump actuators—across plastic, aluminum, and composite materials. Bottle body diameter range (Φ5–Φ170 mm) and height adjustment (20–400 mm) support standard PET beverage bottles, HDPE pharmaceutical containers, laminated tube shoulders, and insulated vacuum flasks. The system conforms to multiple international test standards including ASTM D2063 (Standard Test Method for Measurement of Torque Required to Open or Close Rigid Containers), ASTM D3198 (Standard Practice for Determining the Torque-Tension Relationship of Threaded Fasteners), ASTM D3474 (Standard Guide for Calibration of Torque Measuring Instruments), BB/T 0025 (Packaging—Plastic Caps for Carbonated Beverages), BB/T 0034 (Packaging—Screw Caps for Pharmaceutical Bottles), and GB/T 17876 (Packaging—Torque Testing Method for Plastic Screw Caps). Optional GMP-compliant software modules provide electronic signatures, change control logs, and data integrity safeguards required for pharmaceutical manufacturing environments.
Software & Data Management
Labthink’s proprietary C612M Control Suite (v3.x) offers PC-based remote configuration, firmware updates, and advanced statistical process control (SPC) reporting. DataShield™ integration enables secure bidirectional communication with LIMS, MES, and ERP platforms via OPC UA or RESTful API—supporting centralized instrument fleet management and automated compliance reporting. All test records include embedded digital signatures, immutable timestamps, and full chain-of-custody metadata. Audit trails capture every parameter modification, user login/logout event, calibration action, and test result export—fully compliant with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available).
Applications
- Primary packaging validation: torque profiling of PET water bottles, juice containers, yogurt cups, and infant formula jars.
- Pharmaceutical packaging: verification of tamper-evident band integrity, child-resistant closure efficacy, and dose-dumping prevention in oral solid dosage forms.
- Cosmetic & personal care: evaluation of pump dispensers, mascara wands, and collapsible tube seals under accelerated aging conditions.
- Process optimization: correlation of capping machine settings (speed, pressure, dwell) with measured torque distribution to establish statistical control limits (X̄-R charts).
- Regulatory submission support: generation of IQ/OQ/PQ documentation packages, including uncertainty budgets per ISO/IEC 17025:2017 Annex A.2.
FAQ
What torque ranges does the C612M support out-of-the-box?
The standard configuration includes a 5 N·m load cell; optional 20 N·m and 40 N·m sensors are available for heavy-duty industrial closures.
Is compressed air supply included with the instrument?
No—the C612M requires externally supplied clean, dry compressed air at 0.7 MPa (101.5 psi); users must provide an appropriately rated air compressor and filtration system.
Can the C612M be integrated into a 21 CFR Part 11–compliant environment?
Yes—when equipped with the optional GMP Computer System Package, it supports role-based access control, electronic signatures, audit trail review, and data archiving per FDA guidance.
Does the system support custom fixture design for non-standard closures?
Yes—Labthink offers engineering consultation and custom fixture development services for specialized applications including aerosol actuators, metered-dose inhalers, and medical device connectors.
How frequently should torque calibration be performed?
We recommend annual calibration against NIST-traceable reference standards; internal verification using certified torque check standards is advised before each shift or test batch.
