Distek GD-2 Disintegration Tester (Refurbished)

Overview

The Distek GD-2 Disintegration Tester is a precision-engineered, dual-bath laboratory instrument designed to evaluate the disintegration behavior of solid oral dosage forms—including tablets, capsules, and suppositories—under pharmacopoeial test conditions. Operating on the principle of controlled mechanical agitation in a thermostatically regulated aqueous medium, the GD-2 subjects samples to standardized vertical reciprocation within stainless-steel baskets immersed in water or simulated gastric/intestinal fluids. Its architecture conforms to the hydrodynamic and thermal requirements defined in USP , Ph. Eur. 2.9.1, JP 17 , and ASTM D7892–14, ensuring regulatory alignment for QC laboratories operating under GLP or GMP frameworks.

Key Features

• Dual independent baths (6-tube capacity each), enabling parallel testing of two distinct sample sets under identical or divergent parameters.
• Microprocessor-controlled temperature regulation with PID feedback loop; maintains bath temperature within ±0.5 °C of setpoint across the full operational range (typically 37.0 ±0.5 °C).
• Electromechanical drive system delivering stable, low-vibration vertical motion at 29–32 cycles per minute, with stroke length fixed at 55 mm ± 1 mm per USP specifications.
• Recirculating water bath design utilizing a miniature centrifugal pump and optimized flow path to ensure thermal uniformity (<0.3 °C spatial gradient) throughout each bath chamber.
• Full parametric automation: simultaneous real-time control and display of temperature, elapsed time, and cycle count; user-definable disintegration endpoint (e.g., 30 min, 60 min) with audible/visual termination alert.
• Corrosion-resistant construction: 316 stainless steel baskets, guide rods, and support frames; all wetted components certified for repeated autoclaving and chemical exposure.
• Self-diagnostic firmware that monitors motor current draw, thermal sensor integrity, and basket immersion depth—triggering error codes and halting operation upon deviation beyond tolerance thresholds.

Sample Compatibility & Compliance

The GD-2 accommodates standard USP-compliant disintegration baskets (22 mm diameter × 60 mm height) and supports both immediate-release and delayed-release formulations. It is routinely deployed in stability-indicating assays, formulation development, and batch release testing. Instrument validation documentation—including IQ/OQ protocols aligned with FDA 21 CFR Part 11 data integrity expectations—is available upon request. All refurbished units undergo full functional verification per Distek’s original factory acceptance criteria, including temperature mapping, frequency calibration, and mechanical stroke verification traceable to NIST-traceable standards.

Software & Data Management

While the GD-2 operates via embedded front-panel interface without external PC dependency, its parameter logs (start time, setpoint, actual temperature, cycle count, stop time) are stored in non-volatile memory with timestamping. Optional RS-232 or USB-to-serial interface enables integration with LIMS or electronic lab notebooks (ELN) for automated data export. Audit trail functionality meets ALCOA+ principles when paired with compliant data capture software; raw event logs include operator ID, parameter changes, and system fault records—supporting 21 CFR Part 11 compliance where required.

Applications

• Batch release testing of tablets and hard gelatin capsules per USP and Ph. Eur. 2.9.1.
• Comparative dissolution screening during generic drug development.
• Excipient compatibility studies assessing matrix erosion kinetics under varying pH and temperature profiles.
• Stability protocol execution for accelerated and long-term storage conditions (ICH Q1A–Q1E).
• Process validation support for tablet compression and capsule filling operations.
• Training and method transfer in contract research organizations (CROs) and academic pharmacokinetics labs.

FAQ

Is this unit fully refurbished and tested prior to shipment?
Yes. Each GD-2 undergoes comprehensive metrological verification—including temperature uniformity mapping, frequency accuracy assessment, mechanical stroke validation, and electrical safety testing—per Distek’s OEM service manual. A certificate of conformance and test report accompany every unit.
Does the 6-month warranty cover parts and labor?
Yes. The warranty includes all components, labor, and return shipping for covered defects. Exclusions apply only to damage caused by improper installation, misuse, or unauthorized modification.
Can the GD-2 be integrated into an existing LIMS environment?
Yes, via optional serial communication interface (RS-232 or USB). We provide configuration guidance and sample data parsing scripts compatible with common LIMS platforms.
Are original manuals and calibration certificates included?
Yes. Each unit ships with scanned PDF copies of the Distek GD-2 Operator Manual, Maintenance Guide, and Factory Calibration Certificate. Hard copies are available upon request.
What consumables or accessories are recommended for routine operation?
Standard USP-compliant disintegration baskets (stainless steel, 22 mm), thermometer calibration probes (NIST-traceable), and deionized water filtration cartridges for recirculation system maintenance.