Zuofei ZRM-80 Dual-Mode Roller Mixer (Rolling & Rocking)

Overview

The Zuofei ZRM-80 Dual-Mode Roller Mixer is an engineered laboratory instrument designed for gentle, reproducible, and contamination-free sample agitation in life science, clinical diagnostics, and biopharmaceutical workflows. Unlike conventional vortex mixers or shakers, the ZRM-80 operates on two distinct mechanical principles: horizontal rolling (rotational translation along a fixed axis) and orbital rocking (sinusoidal angular oscillation). This dual-motion architecture generates a controlled three-dimensional fluid trajectory—minimizing shear stress while maximizing convective mass transfer. Its low-shear profile makes it particularly suitable for sensitive biological specimens such as whole blood, peripheral blood mononuclear cells (PBMCs), coagulation assays, and cell suspension cultures where structural integrity and functional viability must be preserved. The device complies with general safety requirements outlined in IEC 61010-1 for laboratory electrical equipment and is constructed to support GLP-aligned sample handling protocols.

Key Features

• Dual operational modes—rolling and rocking—selectable via front-panel toggle switch, enabling method-specific optimization without hardware modification.
• Brushless DC motor delivering stable 0–80 rpm output with ±2 rpm speed accuracy across full load range; no carbon brush wear, zero maintenance over >20,000 hours MTBF.
• Flame-retardant ABS housing (UL94 V-0 rated) ensures compliance with laboratory fire safety standards and resistance to common disinfectants including 70% ethanol and 0.5% sodium hypochlorite.
• Analog dial scale provides immediate visual speed feedback; calibrated against traceable NIST-referenced tachometer during final QA.
• Wide tube compatibility: accommodates single or multiple tubes from 8 mm microcentrifuge format up to 200 mm diameter culture bottles or blood collection tubes (e.g., 50 mL conical, 100 mL serum bottles).
• Thermally robust design validated for continuous operation in environmental chambers at 4 °C (refrigerated storage) and 42 °C / 80% RH (mammalian cell incubation conditions), with condensation-resistant internal layout.
• Low acoustic signature (<45 dB[A] at 1 m distance) suitable for shared lab spaces and quiet-zone facilities.

Sample Compatibility & Compliance

The ZRM-80 supports mixing of viscous, particulate-laden, and density-stratified liquids—including anticoagulant-free whole blood, plasma, serum, bacterial suspensions, agarose gels, and antibody-conjugated beads—without inducing hemolysis, platelet activation, or aggregate formation. It meets standard ergonomic and electrical safety criteria per IEC 61010-1 Ed. 3.0 and conforms to RoHS Directive 2011/65/EU. While not certified under FDA 21 CFR Part 11, its analog control interface and absence of electronic data logging ensure unambiguous audit trails compatible with paper-based SOP documentation required in ISO 15189-accredited clinical labs and USP analytical instrument qualification frameworks.

Software & Data Management

The ZRM-80 operates as a standalone electromechanical system with no embedded firmware, network interface, or digital control logic. All parameters—including speed setting and mode selection—are manually configured via physical controls. This architecture eliminates cybersecurity risks, firmware update dependencies, and software validation burdens typically associated with computer-interfaced instruments. For laboratories implementing ALCOA+ data integrity principles, the absence of electronic records simplifies qualification (IQ/OQ/PQ) and reduces documentation overhead during regulatory inspections. Time-based protocols are executed using external timers or integrated lab management systems.

Applications

• Clinical hematology: Maintaining whole blood homogeneity prior to CBC analysis without EDTA/K2EDTA, reducing preanalytical variability linked to anticoagulant-induced cell morphology changes.
• Transfusion medicine: Gentle resuspension of packed red blood cells and platelet concentrates during storage monitoring per AABB Standards.
• Virology & serology: Uniform antigen-antibody incubation in ELISA and lateral flow assay development.
• Cell therapy QC: Homogenization of cryopreserved PBMC batches prior to viability staining and flow cytometry.
• Pharmaceutical stability testing: Agitation of suspension formulations under ICH Q5C temperature-humidity stress conditions.
• Microbiology: Even dispersion of biofilm-forming bacteria in static culture models simulating catheter or implant surfaces.

FAQ

Is the ZRM-80 suitable for use inside a CO₂ incubator?

No—while validated for 42 °C / 80% RH environments, the unit is not rated for CO₂-rich atmospheres or condensing humidity levels typical of humidified CO₂ incubators. Use only in dry-heat incubators or climate-controlled rooms.
Can the roller speed be precisely set to intermediate values between marked dial increments?

Yes—the analog dial provides continuous adjustment; each increment corresponds to ~5 rpm, but fine-tuning is possible by rotating the knob beyond detent positions.
Does the device include overload or thermal protection?

Yes—the brushless motor incorporates integrated thermal cutoff and current-limiting circuitry compliant with IEC 60730-1 Annex H, automatically halting operation if surface temperature exceeds 75 °C.
What cleaning agents are compatible with the ABS housing?

70% isopropyl alcohol, 0.5% sodium hypochlorite, and quaternary ammonium disinfectants. Avoid chlorinated solvents, acetone, or strong alkalis that may degrade flame-retardant additives.
Is calibration documentation provided with shipment?

A factory calibration certificate (traceable to national metrology institutes) is included, listing speed verification at 20, 40, 60, and 80 rpm using a NIST-traceable optical tachometer.