CZGY JJ-4 Digital Six-Station Electric Stirrer
| Brand | CZGY |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | JJ-4 |
| Instrument Type | Electric Stirrer |
| Max. Mixing Volume | 20 L per station |
| Speed Range | 80–3000 rpm |
| Temperature Control | Not equipped |
Overview
The CZGY JJ-4 Digital Six-Station Electric Stirrer is a precision-engineered laboratory mixing platform designed for simultaneous, independent control of six stirring units. It operates on the principle of mechanical rotational agitation via direct-coupled permanent-magnet DC motors, delivering consistent torque and stable speed output across variable viscosity ranges — from low-viscosity aqueous solutions to moderately viscous suspensions and emulsions. Unlike magnetic stirrers limited by heat sensitivity and vessel geometry, this unit accommodates standard glassware (e.g., beakers, Erlenmeyer flasks, and cylindrical bottles) with vertical shaft insertion, enabling robust dispersion, homogenization, and dissolution tasks in quality control labs, environmental testing facilities, pharmaceutical R&D, and academic teaching laboratories. Its architecture supports reproducible batch preparation under defined shear conditions, making it suitable for method development aligned with ASTM D1537 (standard practice for mixing polymer solutions) and ISO 6974 (mixing protocols for analytical sample preparation).
Key Features
- Six independent stirring stations with individual digital speed and timer controls — eliminates cross-interference and enables parallel multi-condition experiments
- Permanent-magnet DC motors (80 W nominal power per station) providing high starting torque, low acoustic noise (<55 dB(A) at 1 m), and intrinsic speed stability without feedback sensors
- Digital LED display showing real-time rpm (±1 rpm resolution) and programmable timer (0–9999 minutes, with continuous operation mode)
- Stepless electronic speed regulation from 80 to 3000 rpm — optimized for both gentle suspension maintenance and vigorous dispersion
- Stainless-steel stirring rods (304 grade) with standardized 10 mm shaft diameter; compatible with common clamping accessories and autoclavable
- Robust aluminum alloy chassis with height-adjustable support column and universal clamp mount — accommodates vessels up to 20 L volume per station
- No integrated heating or temperature sensing; intended for ambient-temperature mixing only — ensures electrical safety and avoids thermal drift in sensitive formulations
Sample Compatibility & Compliance
The JJ-4 accepts standard laboratory containers including borosilicate glass beakers (50 mL–5000 mL), wide-mouth Erlenmeyer flasks, and polypropylene carboys. Stirring rod immersion depth is manually adjustable via rack-and-pinion lift mechanism, ensuring optimal vortex formation without splashing or cavitation. The device complies with IEC 61010-1:2010 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use), including protection class IP20 and double-insulation design. While not certified for hazardous-area use (ATEX/IECEx), it meets general-purpose lab safety standards applicable in GLP-compliant environments. No regulatory claim is made for FDA 21 CFR Part 11 compliance; however, raw operational data (speed setpoint, elapsed time) may be manually logged for audit trails in non-automated workflows.
Software & Data Management
This instrument operates as a standalone hardware platform with no embedded microcontroller-based data logging or PC connectivity. All parameters are set and monitored locally via front-panel push-button interface (↑/↓ for speed, H/M for time, RUN/STOP for activation). The digital display retains last-used settings across power cycles, supporting procedural consistency in routine assays. For traceability, users are advised to record operational parameters in bound lab notebooks or LIMS-integrated forms. No proprietary software, drivers, or firmware updates are provided or required.
Applications
- Preparation of calibration standards and reference materials in environmental labs (e.g., heavy metal stock solutions, suspended sediment slurries)
- Homogenization of cell culture media and buffer solutions prior to filtration or sterilization
- Dispersion of nanomaterials (e.g., TiO₂, SiO₂ colloids) in aqueous or organic carriers for stability testing
- Accelerated aging studies requiring controlled agitation of polymer blends or coating formulations
- Teaching laboratories: demonstration of Newtonian vs. non-Newtonian fluid behavior through comparative viscosity-dependent speed response
- QC testing of detergent efficacy, where standardized mixing intensity directly impacts foam generation and soil removal metrics
FAQ
Is the JJ-4 suitable for high-viscosity samples such as polymer melts or pastes?
No — the unit is rated for liquids and low-to-medium viscosity suspensions (up to ~5,000 mPa·s typical). It lacks torque overload protection and thermal cutoff for sustained high-load operation.
Can the stirring speed be synchronized across all six stations?
Yes — while each station is independently controllable, the master speed dial allows uniform setting across all channels without individual reprogramming.
What is the maximum recommended flask size per station?
Up to 20 L cylindrical containers with stable base geometry; optimal performance observed with vessels having aspect ratio (height/diameter) ≤ 2.5.
Does the unit include a calibration certificate or metrological traceability?
No — speed accuracy (±1 rpm) is factory-verified but not accompanied by NIST-traceable documentation; users may perform in-house verification using an optical tachometer.
Is replacement of the stainless-steel stirring rods supported by the manufacturer?
Yes — CZGY supplies OEM-compatible rods (part no. JJ-4-ROD-304) in lengths of 200 mm, 300 mm, and 400 mm, sold separately.
