STR4/4 Rotating Drum with Four-Section Perspex Cradle Stand
| Origin | Germany |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | STR4/4 |
| Pricing | Upon Request |
Overview
The STR4/4 Rotating Drum with Four-Section Perspex Cradle Stand is an engineered laboratory device designed for controlled, low-shear agitation of liquid or semi-solid samples during stability testing, dissolution profiling, or homogeneity assessment. Unlike orbital shakers or vortex mixers, this system operates on a rotating drum principle—where the entire cradle assembly rotates around a horizontal axis at adjustable, low-speed intervals—ensuring gentle yet uniform sample movement without splashing, foaming, or phase separation. The unit is purpose-built for long-duration, unattended operation in regulated environments such as pharmaceutical QC labs, cosmetic formulation centers, and materials R&D facilities where reproducible mechanical stress simulation is required.
Key Features
- Four independent Perspex® (polymethyl methacrylate) cradle sections, each accommodating cylindrical or rectangular containers up to 300 mm in length and 120 mm in maximum diameter
- Secure Velcro® fastening straps per cradle section—non-invasive, tool-free, and compatible with glass, HDPE, PET, and stainless-steel vessels
- Stainless-steel main frame with powder-coated structural supports, ensuring dimensional stability under continuous rotation and load imbalance
- Low-noise, brushless DC motor drive with speed regulation via external potentiometer (standard configuration); optional digital controller available for programmable rotation profiles
- Compliance-ready design: footprint and mounting geometry support integration into ISO 17025-accredited lab workflows and GLP-compliant stability chambers
Sample Compatibility & Compliance
The STR4/4 accommodates a broad range of primary and secondary packaging formats—including vials, syringes, ampoules, bottles, and pouches—without requiring custom adapters. Its open cradle architecture permits visual monitoring and rapid container exchange during testing cycles. Each Perspex® cradle section is autoclavable (up to 121 °C, 20 min), supporting reuse in sterile process validation studies. The system meets mechanical safety requirements per EN 61000-6-2 (EMC immunity) and EN 61000-6-3 (EMC emission), and its non-corrosive construction aligns with USP Analytical Instrument Qualification guidelines for auxiliary equipment used in method validation.
Software & Data Management
While the base STR4/4 model operates without embedded firmware, it is fully compatible with third-party data acquisition systems via analog tachometer output (0–10 VDC proportional to RPM). When integrated with validated LIMS or ELN platforms, rotation duration, start/stop timestamps, and operator ID can be logged in accordance with FDA 21 CFR Part 11 requirements—provided audit trail functionality is enabled at the host system level. Optional accessories include a calibrated optical encoder kit and RS-485 interface module for synchronized multi-unit deployment in temperature-controlled stability rooms.
Applications
- Accelerated stability testing of suspensions, emulsions, and viscous gels per ICH Q1A(R3) and USP
- Uniformity-of-dose evaluation for inhalation aerosols and nasal sprays during shelf-life studies
- Pre-clinical excipient compatibility screening under simulated transport conditions
- Homogenization verification of radiopharmaceutical preparations prior to dose calibration
- Long-term sedimentation rate analysis of colloidal dispersions in material science laboratories
FAQ
What types of containers can be secured in the STR4/4 cradle?
Standard cylindrical or rectangular containers up to 300 mm in length and 120 mm in maximum cross-sectional dimension—regardless of material (glass, plastic, metal)—are supported via adjustable Velcro® straps.
Is the STR4/4 suitable for use inside environmental chambers?
Yes; the unit’s ambient operating temperature range is –10 °C to +50 °C, and its sealed motor housing and non-hygroscopic Perspex® components ensure reliable function within humidity-controlled stability chambers (e.g., 25 °C/60% RH, 40 °C/75% RH).
Does the STR4/4 require periodic calibration?
No routine calibration is mandated for the mechanical system itself; however, if used in GxP-regulated workflows, users must perform operational qualification (OQ) at installation and after any major maintenance, verifying rotational consistency across all four cradle sections using a certified tachometer.
Can the rotation direction be reversed?
The standard configuration operates in a single fixed direction (clockwise when viewed from the drive-side); bidirectional capability is available only with the optional digital control module.
Is technical documentation provided in English?
Yes—complete user manual, mechanical drawings, CE Declaration of Conformity, and traceable material certifications are supplied in English upon delivery.
