Multi-Position Hotplate Magnetic Stirrer
Multi-position hotplate magnetic stirrer with precise temperature control (RT-300°C, ±1°C) and variable speed stirring (200-1500 rpm) for parallel sample processing.
Louise Corscadden, PhD
Neuroscience · ConductScience
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The Multi-Position Hotplate Magnetic Stirrer combines precise temperature control with simultaneous magnetic stirring across multiple positions. Available in 2, 4, or 6-position configurations with 140mm diameter working plates, this benchtop instrument enables parallel sample processing for synthetic chemistry, sample preparation, and analytical workflows requiring controlled heating and mixing.
Temperature control operates from room temperature to 300°C with ±1°C accuracy using PID control and PT1000 temperature sensing. The brushless DC motor provides stirring speeds from 200-1500 rpm. Aluminum heating plates with ceramic coating ensure uniform heat distribution, while waste heat monitoring provides high temperature alarms above 50°C for laboratory safety.
How It Works
The instrument operates through electromagnetic induction heating combined with magnetic field generation for stirring. The aluminum heating plates with ceramic coating provide uniform thermal distribution across the 140mm working surfaces. PID control algorithms maintain temperature stability by continuously adjusting heating output based on PT1000 temperature sensor feedback, achieving ±1°C accuracy throughout the operating range.
Magnetic stirring is generated by rotating permanent magnets beneath each heating plate, driven by brushless DC motors. The magnetic field penetrates glass and plastic containers, coupling with magnetic stir bars to create consistent mixing action. Variable speed control from 200-1500 rpm accommodates different viscosities and mixing requirements.
Safety systems include waste heat monitoring with automatic high temperature alarms when ambient temperatures exceed 50°C, preventing overheating in enclosed laboratory environments.
Features & Benefits
Automation Level
- semi-automated
BK-MS300-S4
- BK-MS300-S6
Position
- 2
4
- 6
Working Plate Size
- Φ140mm*2
Φ140mm*4
- Φ140mm*6
Temperature Control Range
- RT~300℃
Temperature Control Accuracy
- ±1℃
Speed Range
- 200~1500rpm
Hot Plate Material
- Aluminum heating plate+ceramic coating
Motor
- Brushless DC motor
Temp. Sensor
- PT1000
Temperature Control Method
- PID control
Waste Heat High Temperature Alarm
- ＞50℃
Brand
- ConductScience
Research Domain
- Analytical Chemistry
- Environmental Monitoring
- Food Science
- Materials Science
- Microbiology
- Pharmaceutical QC
Display Type
- LED
Weight
- 3.9 kg
Dimensions
- L: 9.5 mm
- W: 32.0 mm
- H: 23.6 mm
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Number of Positions | Available in 2, 4, or 6 positions | Many entry-level models offer only single positions | Parallel processing capability significantly improves laboratory productivity and ensures identical conditions across multiple samples. |
| Temperature Range | Room temperature to 300°C | Basic models often limited to 200-250°C maximum | Extended temperature range accommodates high-temperature synthesis and specialized analytical procedures. |
| Temperature Accuracy | ±1°C with PID control | Standard models typically offer ±2-5°C accuracy | Precise temperature control is critical for reproducible results in temperature-sensitive reactions and analyses. |
| Motor Type | Brushless DC motor | Many units use brushed motors requiring more maintenance | Brushless design provides longer service life and more consistent stirring performance with minimal maintenance requirements. |
| Working Plate Size | 140mm diameter per position | Smaller units may offer 100-120mm plates | Larger working area accommodates bigger vessels and provides better heat transfer for larger sample volumes. |
| Safety Features | Waste heat alarm above 50°C | Basic models often lack ambient temperature monitoring | Active safety monitoring prevents overheating conditions and enhances laboratory safety protocols. |
This multi-position hotplate magnetic stirrer provides advanced temperature control capabilities with PID regulation and extended temperature range to 300°C. The brushless motor design and multiple position options offer significant advantages for laboratories requiring parallel sample processing with precise thermal management.
Practical Tips
Verify temperature accuracy monthly using a calibrated thermometer in a water bath on each heating position.
Why: Temperature sensors can drift over time, affecting experimental reproducibility and data quality.
Clean heating plates with mild detergent after each use and inspect ceramic coating for chips or wear.
Why: Damaged coatings can create hot spots and affect temperature uniformity across the working surface.
Allow 10-15 minutes thermal equilibration time when changing temperature setpoints above 100°C.
Why: Thermal lag in the heating system and sample vessels requires time to reach stable conditions for accurate measurements.
Ensure adequate ventilation around the unit and never block air vents during operation.
Why: Proper airflow prevents activation of the waste heat alarm and maintains safe ambient temperatures.
If stirring becomes erratic, check that magnetic stir bars are properly centered and not damaged.
Why: Off-center or chipped stir bars can cause vibration and inconsistent mixing that affects sample homogeneity.
Record both setpoint and actual temperatures for each position when documenting experimental conditions.
Why: Temperature variations between positions or from setpoints can significantly impact reaction rates and analytical results.
Use vessels with flat bottoms to maximize thermal contact with heating plates.
Why: Good thermal contact ensures accurate temperature control and uniform heating throughout the sample.
Keep a log of temperature calibration checks and any adjustments made to each position.
Why: Documentation helps identify drift patterns and ensures traceability for quality assurance requirements.
Setup Guide
What’s in the Box
- Multi-position hotplate magnetic stirrer unit
- Power cord
- User manual and operation guide
- Magnetic stir bars set (typical)
- Temperature calibration certificate (typical)
Warranty
ConductScience provides a standard one-year manufacturer warranty covering defects in materials and workmanship, with technical support available for setup, operation, and troubleshooting assistance.
Compliance
References
Background reading relevant to this product:
What is the temperature uniformity across each heating position?
The aluminum heating plates with ceramic coating provide uniform heat distribution across the 140mm working surface. PT1000 temperature sensors with PID control maintain ±1°C accuracy at the sensor location. For critical applications, verify temperature uniformity using multiple thermocouples across the plate surface.
Can the stirring speed and temperature be controlled independently for each position?
Consult product datasheet for specific control configuration. The unit features individual 140mm working plates with brushless DC motors, suggesting independent operation capability, but control interface specifications should be verified.
What maximum vessel size can be accommodated on each position?
Each position features a 140mm diameter working plate, accommodating vessels up to this size. Consider vessel stability and heat transfer efficiency when selecting glassware, ensuring adequate contact with the heating surface.
How long does it take to reach temperature setpoints?
Heating rate depends on thermal mass of samples and ambient conditions. The PID control system optimizes heating profiles, but specific ramp rates should be determined experimentally for your vessel and sample types.
What maintenance is required for the stirring motors?
Brushless DC motors require minimal maintenance compared to brushed alternatives. Regular cleaning of heating plates and ensuring proper ventilation around the unit are primary maintenance requirements.
Can the unit operate continuously for extended periods?
The design includes waste heat monitoring with high temperature alarms above 50°C, indicating consideration for continuous operation. Ensure adequate laboratory ventilation and follow duty cycle recommendations in the user manual.
What accuracy can be expected for temperature measurements?
Temperature control accuracy is specified as ±1°C using PT1000 sensors with PID control. This represents control stability at the sensor location; sample temperature may vary depending on vessel type and thermal contact.
Are the heating plates compatible with all types of laboratory glassware?
The ceramic-coated aluminum plates are compatible with standard borosilicate glass, plastic, and metal containers. Avoid direct contact with highly corrosive chemicals that may damage the ceramic coating.
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