SP-42 Mini Mixing Wheel
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | SP-42 |
| Pricing | Upon Request |
Overview
The SP-42 Mini Mixing Wheel is a precision-engineered laboratory mixing device designed for standardized, reproducible homogenization of solid particulate samples—particularly coal, ores, mineral aggregates, and other heterogeneous bulk materials. It operates on the principle of rotational tumbling under controlled angular orientation and speed, ensuring mechanical sample integrity while minimizing segregation or particle attrition. Unlike vortex or shaker-based systems, the SP-42 employs a fixed-axis rotary platform with adjustable tilt geometry, directly supporting ASTM D2013 “Standard Practice for Preparing Coal Samples for Analysis” and related ISO 13909-3 (Coal and Coke — Sampling — Part 3: Preparation of Test Samples) requirements. Its benchtop architecture integrates mechanical stability, electrical safety, and ergonomic operation for routine QC/QA laboratories, core sample preparation facilities, and contract testing labs performing ASTM-compliant sample division and blending prior to proximate/ultimate analysis, ash fusion, or calorimetry.
Key Features
- Adjustable rotational speed range: 10–60 rpm, continuously variable via integrated foot-mounted speed control module—enabling precise tuning for fragile, friable, or high-density materials.
- Simultaneous processing of up to six 8 oz (237 mL) sample containers mounted on a rigid, tiltable aluminum hub.
- Three-point thumb-screw clamping system secures containers at a fixed 45° inclination angle—fully compliant with ASTM D2013’s specified tumbling geometry for representative coal sample mixing.
- Heavy-duty powder-coated steel frame with non-slip elastomeric feet ensures vibration damping and positional stability during extended operation.
- Thermally protected, continuous-duty AC induction motor rated for sustained rotation of containers up to 3.5 in (89 mm) in diameter.
- UL-listed 6-ft (1.8 m) three-conductor power cord with grounded plug; speed controller positioned remotely to eliminate operator proximity hazards near rotating components.
Sample Compatibility & Compliance
The SP-42 accommodates standard wide-mouth glass or polypropylene sample jars (e.g., SPA-60 series), including those fitted with internal agitator elements such as SPA-64 jackrock media for accelerated homogenization of coarse or layered samples. Its mechanical design supports uniform mass distribution across all six positions without cross-contamination risk. The unit meets applicable portions of ASTM D2013, ISO 13909-3, and ASTM D3174 (Ash in the Analysis Sample of Coal and Coke), and is routinely deployed in laboratories operating under GLP (Good Laboratory Practice) and ISO/IEC 17025-accredited quality management systems. No modifications are required for use in environments subject to FDA 21 CFR Part 11 data integrity expectations when paired with validated documentation workflows.
Software & Data Management
The SP-42 is a standalone electromechanical instrument with no embedded firmware or digital interface. Speed settings are manually adjusted and maintained via analog potentiometer control; no software drivers, firmware updates, or network connectivity are involved. For auditability, users may record operational parameters—including speed, duration, container count, and orientation angle—in laboratory notebooks or LIMS-integrated electronic batch records. The absence of programmable logic or stored configurations simplifies validation protocols and eliminates cybersecurity or electronic signature compliance overhead typically associated with computer-controlled mixers.
Applications
- Pre-analysis homogenization of coal, lignite, coke, and metallurgical ores per ASTM D2013 and ISO 13909.
- Blending of heterogeneous geological core samples prior to subsampling for geochemical assay.
- Uniform dispersion of additive-doped reference materials in proficiency testing programs.
- Stabilization of moisture-sensitive powders prior to gravimetric moisture determination (ASTM D3173).
- Consistent preparation of calibration standards containing particulate fillers or heterogeneous matrices.
FAQ
Is the SP-42 compatible with 230 V / 50 Hz power supplies?
Yes—when used with the optional TR-502 step-down transformer (120 V → 230 V), the SP-42 can operate safely and within specification on international mains voltage.
Can I use non-standard container sizes or shapes?
The clamping system is optimized for 8 oz (237 mL) wide-mouth cylindrical jars (e.g., SPA-60). Deviations in diameter or neck geometry may compromise secure mounting and rotational balance.
Does the unit include sample containers?
Yes—the standard configuration includes six SPA-60 glass sample jars with screw caps and optional SPA-64 jackrock media for enhanced mixing efficiency.
What maintenance is required?
Routine inspection of thumb-screw torque, motor ventilation grilles, and cord integrity is recommended. No lubrication or recalibration is necessary due to its fixed-mechanism design.
Is the SP-42 suitable for hazardous location use?
No—it is not rated for Class I/II/III, Division 1/2, or ATEX environments. Operation is restricted to general laboratory areas with ambient temperature and humidity control.
