CZGY HJ-10 Ten-Position Magnetic Stirrer
| Brand | CZGY |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | HJ-10 |
| Instrument Type | Magnetic Stirrer |
| Max Stirring Volume | 1 L × 10 |
| Speed Range | 0–2000 rpm |
Overview
The CZGY HJ-10 Ten-Position Magnetic Stirrer is an engineered solution for parallel sample preparation in quality control laboratories, pharmaceutical R&D facilities, and academic research settings where consistent, low-heat mixing of multiple small-volume samples is required. Utilizing permanent magnet coupling and rotating magnetic fields generated by independent coil assemblies beneath each stainless-steel plate, the HJ-10 delivers precise rotational agitation without mechanical shafts or seals—eliminating contamination risk and enabling operation under sealed vessels. Designed for continuous duty in ambient laboratory environments, it supports standardized protocols requiring reproducible agitation across up to ten 1-L vessels simultaneously, making it particularly suitable for dissolution testing, buffer equilibration, reagent homogenization, and pre-analytical sample conditioning prior to HPLC, ICP-MS, or titration workflows.
Key Features
- Ten independently controlled stirring positions, each with dedicated speed adjustment via precision analog rotary dials—no shared controller interference or cross-talk.
- Stainless-steel heating plates (12 cm × 10 cm footprint per position) offer corrosion resistance, thermal stability, and compatibility with glass, polypropylene, and PTFE-coated containers.
- 0–2000 rpm continuous speed range with smooth low-end torque delivery—capable of initiating rotation from standstill even with high-viscosity aqueous solutions (e.g., 5% w/v CMC or 3% agarose).
- 15 W per position motor rating ensures energy-efficient operation without thermal overload during extended runs; total system power draw remains below 200 W at full load.
- Robust chassis construction with non-slip rubber feet and recessed cable management minimizes vibration transmission and improves benchtop stability during multi-hour operations.
- No integrated heating element—designed exclusively for magnetic stirring only—ensuring compliance with applications where temperature control must be externally managed (e.g., cold-room assays or thermostated bath integration).
Sample Compatibility & Compliance
The HJ-10 accommodates standard laboratory vessels including 50–1000 mL beakers, Erlenmeyer flasks, graduated cylinders, and custom reaction tubes equipped with PTFE-coated stir bars (3–5 cm length recommended). Its open-platform design permits unrestricted access for pipetting, pH probe insertion, or real-time visual monitoring. While not certified to UL/CE or IEC 61010-1 as a standalone unit (as supplied without enclosure or safety interlocks), the device conforms to general electrical safety expectations for Class I laboratory equipment when used with grounded 220 V AC / 50 Hz supply. It supports GLP-aligned documentation practices through operator-recorded speed settings and run durations, and is routinely deployed in environments adhering to ISO/IEC 17025 and USP auxiliary equipment guidelines for non-sterile compounding support.
Software & Data Management
The HJ-10 operates as a hardware-only instrument with no embedded firmware, touchscreen interface, or digital connectivity. All operational parameters—including individual channel speeds—are set manually using calibrated analog dials. This architecture eliminates software validation requirements under FDA 21 CFR Part 11 and simplifies audit readiness for regulated labs: no electronic records, no user access logs, and no need for periodic software verification. Users maintain traceability via handwritten logbooks or LIMS-integrated batch records noting position-specific rpm values and start/stop timestamps. For automated data capture, third-party USB-connected tachometers or vision-based RPM verification systems may be employed post-deployment.
Applications
- Parallel dissolution testing of solid dosage forms across ten USP Apparatus 2 vessels.
- Simultaneous pH adjustment and buffering of multiple calibration standards in analytical chemistry labs.
- Homogenization of cell lysis buffers prior to centrifugation in molecular biology workflows.
- Pre-mixing of reagent kits for ELISA, PCR master mix preparation, or immunoassay development.
- Stirring of solvent blends during HPLC mobile phase preparation under inert atmosphere gloveboxes (compatible with magnetic stir bars inside sealed vials).
- Supporting ASTM D4097 (standard test method for viscosity of asphalt binders) sample conditioning steps where shear history must be minimized prior to rotational viscometry.
FAQ
Does the HJ-10 include heating functionality?
No. The HJ-10 is a magnetic stirrer only—no integrated heating elements are present. Temperature control must be achieved externally (e.g., water bath, environmental chamber, or hotplate-stirrer hybrid setup).
Can I use the HJ-10 with flasks containing volatile organic solvents?
Yes, provided appropriate stir bars (e.g., PTFE-encapsulated or glass-coated) are selected and vessels are adequately vented or capped with septa to prevent evaporation or pressure buildup.
Is speed calibration traceable to national standards?
Speed indication is based on factory-calibrated potentiometer response; formal metrological traceability requires external verification using a NIST-traceable optical tachometer.
What maintenance is required?
Routine cleaning of stainless-steel surfaces with isopropyl alcohol; periodic inspection of stir bar integrity and motor ventilation grilles for dust accumulation.
Are replacement parts available?
Yes—CZGY supplies OEM stir bars, replacement dials, and PCB-level service kits directly to institutional purchasers under contractual support agreements.
