ZiQi ZQRM-A Tube Rotator Mixer

Overview

The ZiQi ZQRM-A Tube Rotator Mixer is an entry-level, precision-engineered laboratory device designed for gentle, continuous rotational mixing of liquid samples in standard laboratory tubes. Operating on the principle of controlled orbital rotation with fixed-axis tilt, the instrument generates consistent, low-shear motion ideal for homogenizing blood specimens in vacuum collection tubes, reconstituting lyophilized reagents, suspending cell pellets, and preparing dilution series prior to downstream analysis. Unlike vortex mixers or orbital shakers, the ZQRM-A employs a 38° inclined rotating disk that induces a rolling motion—ensuring thorough sample contact with tube walls without foaming, phase separation, or mechanical stress on fragile biological matrices. Its fixed-speed range (6–32 rpm) is optimized for applications requiring reproducible, non-turbulent agitation across diverse tube formats commonly used in clinical diagnostics, immunology, and molecular biology workflows.

Key Features

• Fixed-angle rotating platform (38° tilt) ensures uniform rolling motion for complete sample resuspension without splashing or bubble formation.
• Ergonomic, tool-free elastic tube clamps enable rapid installation and removal of tubes; compatible with multiple formats including 1.5 mL, 5 mL, 15 mL, and 50 mL centrifuge tubes and vacuum blood collection tubes.
• Digital LED display (standard on ZQRM-B; optional upgrade path for ZQRM-A) provides real-time monitoring of rotational speed and elapsed time.
• Stable, low-vibration DC motor drive delivers consistent torque output across the full speed range (6–32 rpm), minimizing mechanical drift during extended operation.
• Compact footprint (300 mm disk diameter) and robust ABS+metal housing support benchtop deployment in high-density lab environments, including clinical laboratories, QC labs, and biobanking facilities.
• Compliant with IEC 61010-1 safety standards for electrical equipment for measurement, control, and laboratory use.

Sample Compatibility & Compliance

The ZQRM-A accommodates standardized tube geometries used across global clinical and research settings—including BD Vacutainer®, Sarstedt®, and Eppendorf® certified tubes. Its universal clamp design eliminates the need for model-specific adapters, reducing consumable inventory overhead. While the base ZQRM-A operates without programmable timing, its architecture supports integration into GLP-compliant workflows when paired with external time-stamped logging systems. For regulated environments, the ZQRM-B variant—with its built-in 1–999 minute timer and digital audit trail—facilitates adherence to internal SOPs aligned with ISO 15189 (medical laboratories) and CLIA requirements for specimen handling traceability.

Software & Data Management

The ZQRM-A is a stand-alone analog-digital hybrid instrument with no embedded firmware or network interface. All operational parameters are set manually via front-panel controls, ensuring deterministic behavior and eliminating software validation burdens. The ZQRM-B extends this foundation with non-volatile memory for timer presets and speed recall, supporting repeatable protocol execution. Neither model requires driver installation or cloud connectivity; however, both are fully compatible with laboratory information management systems (LIMS) via manual log entry or barcode-scanned batch documentation. No FDA 21 CFR Part 11 electronic signature functionality is provided, as the device performs no data acquisition or storage—consistent with its classification as a Class I general-purpose laboratory accessory under U.S. FDA and EU MDR definitions.

Applications

• Clinical hematology: Gentle mixing of EDTA, citrate, and heparin anticoagulated blood samples prior to CBC, coagulation assays, or flow cytometry.
• Immunodiagnostics: Uniform suspension of antigen-coated beads or magnetic particles in immunoassay preparation steps.
• Biobanking: Low-shear resuspension of cryopreserved PBMCs or tissue homogenates post-thawing.
• Pharmaceutical QC: Homogenization of reference standards and calibration solutions in stability studies per ICH Q5C guidelines.
• Academic research: Preparation of bacterial culture inocula, enzyme reaction mixtures, and antibody dilutions requiring minimal shear-induced denaturation.

FAQ

Is the ZQRM-A suitable for mixing viscous samples such as glycerol stocks or serum-containing media?
Yes—the 38° tilt angle and low-speed rotational profile minimize shear forces while maximizing wall contact time, making it appropriate for moderately viscous liquids up to ~200 cP.
Can the ZQRM-A be operated continuously for 24 hours?
Yes—designed for unattended long-term operation, the unit features thermal protection circuitry and a sealed DC motor rated for continuous duty at ambient temperatures ≤35°C.
Does ZiQi provide calibration certificates or metrological traceability documentation?
Calibration is user-performed using a handheld tachometer; ZiQi supplies a basic verification procedure in the operator manual but does not issue NIST-traceable certificates as the device falls outside mandatory metrological regulation scopes for Class I lab accessories.
What maintenance is required for routine operation?
No scheduled maintenance is required beyond periodic cleaning of the disk surface and clamps with 70% ethanol; no lubrication or belt replacement is necessary due to the direct-drive motor architecture.
Is the ZQRM-A compatible with international voltage standards (e.g., 110 V, 60 Hz)?
The standard configuration supports only 220 V ±10%, 50/60 Hz input; custom voltage variants (e.g., 110 V) are available upon OEM request with lead-time adjustment.