1. What is a mini magnetic stirrer?

2. How does a mini magnetic stirrer work?

1. The host’s internal coil generates a rotating magnetic field when powered on.
2. The magnetic rotor (made of permanent magnet material) inside the sample container aligns with the rotating magnetic field.
3. The rotor rotates synchronously with the magnetic field, driving the liquid sample to form a vortex, realizing uniform mixing.
    
   No direct mechanical connection between the host and rotor means it’s suitable for sealed containers, avoiding sample contamination or leakage.

3. What are the core advantages of a mini magnetic stirrer?

• Compact & Portable: Small size (usually palm-sized) and light weight, easy to carry and store, fitting narrow laboratory benches.
• Quiet & Energy-Saving: Electromagnetic drive produces low noise (<40dB) and low power consumption (typically 5–15W), suitable for long-term operation.
• Easy to Operate: Simple control panel with adjustable speed (usually 0–2000rpm), no complex setup—ideal for beginners.
• Safe & Clean: Contactless stirring avoids direct contact between the drive mechanism and sample, preventing contamination; easy to clean after use.

4. What scenarios is it suitable for?

• Laboratories: Chemical synthesis, biological sample preparation, reagent mixing, and pH adjustment (e.g., mixing buffer solutions, cell culture media).
• Education: Middle school and university chemistry/biology experiments, helping students understand stirring principles.
• Small-Scale Production: Small-batch mixing in food, pharmaceutical, or cosmetic industries (e.g., essential oil blending, liquid seasoning mixing).
• On-Site Testing: Environmental monitoring, water quality analysis, and other field experiments requiring portable stirring.
   
  It’s suitable for aqueous solutions, organic solvents, and low-viscosity liquids (viscosity <1000 mPa·s); not recommended for high-viscosity or solid-containing mixtures.

5. How to use a mini magnetic stirrer correctly?

1. Place the clean sample container (beaker, test tube, or flask) on the host’s center.
2. Put a matching magnetic rotor into the container (ensure the rotor size fits the container diameter).
3. Add the liquid sample (avoid exceeding 80% of the container volume to prevent splashing).
4. Power on, adjust the speed gradually from low to high (start at 300–500rpm to avoid rotor deviation), and set the stirring time as needed.
5. After use, turn off the power, take out the rotor with a magnetic retriever, and clean the host and container.
    
   Note: Do not run the stirrer without liquid (empty stirring may damage the rotor or host); keep the host away from water and magnetic materials.

6. What should I consider when selecting a mini magnetic stirrer?

• Stirring Capacity: Choose based on your typical sample volume (e.g., 50mL for test tubes, 500mL for small beakers).
• Speed Range: Ensure the speed covers your needs (e.g., 0–1500rpm for general mixing, 0–2000rpm for faster stirring).
• Temperature Control (Optional): If you need heating while stirring, select a model with built-in heating (temperature range 30–100°C) and overheating protection.
• Material: The host’s work surface should be corrosion-resistant (e.g., stainless steel or ceramic) to withstand chemical spills.
• Safety Features: Prioritize models with overload protection, speed stabilization, and anti-slip feet for stability.

7. How to maintain it for longer service life?

• Clean the work surface and rotor after each use with a damp cloth (avoid harsh chemicals).
• Store the rotor separately in a dry place to prevent magnetization loss.
• Avoid dropping or impacting the host, as it may damage the internal electromagnetic coil.
• Do not use the stirrer in high-humidity or high-temperature environments; unplug it when not in use.

Summary