Leici JB-10 Magnetic Stirrer

Overview

The Leici JB-10 Magnetic Stirrer is a compact, benchtop laboratory instrument engineered for reliable and consistent agitation of liquid samples in beakers, flasks, and other standard glassware. It operates on the principle of magnetic coupling: a rotating permanent magnet or electromagnetic drive beneath the non-magnetic work surface induces synchronized rotation of a PTFE- or glass-coated magnetic stir bar immersed in the sample. This contactless drive mechanism eliminates mechanical shaft seals, minimizes contamination risk, and ensures quiet, maintenance-free operation—ideal for routine dissolution, homogenization, titration support, and reagent preparation in academic, quality control, and R&D laboratories.

Key Features

• Stable speed control across a wide 0–1500 rpm range, enabling precise adjustment for low-viscosity aqueous solutions as well as moderately viscous buffers and suspensions.
• IP65-rated housing provides robust protection against dust ingress and low-pressure water jets—suitable for use in wet lab environments, fume hoods, or near sink stations without risk of operational failure.
• Compact footprint (220 × 150 × 70 mm) and lightweight design (~0.5 kg) facilitate easy relocation between workstations, storage in shared lab cabinets, or integration into modular experimental setups.
• Smooth ceramic-coated top plate offers high thermal resistance and chemical inertness, resisting degradation from common solvents, acids, and bases during extended heating-integrated applications (when used with compatible hotplate variants).
• Optimized magnetic drive system delivers consistent torque transmission up to the maximum rated load of 1000 mL water-equivalent volume, maintaining rotational stability even with larger stir bars (up to 30 × 8 mm) and moderate viscosity increases.

Sample Compatibility & Compliance

The JB-10 is designed for open-vessel stirring of chemically diverse liquid-phase samples, including aqueous buffers, organic solvent mixtures, cell culture media, and dilute polymer solutions. Its magnetic coupling architecture avoids sample contact with moving parts, supporting GLP-aligned workflows where cross-contamination must be minimized. While the unit itself does not incorporate temperature control, its IP65 rating and chemically resistant surface align with ISO/IEC 17025 general requirements for equipment suitability in accredited testing laboratories. No built-in data logging or electronic audit trail is provided; therefore, manual recording of operating parameters (e.g., speed, duration) is recommended for traceability in regulated environments.

Software & Data Management

The Leici JB-10 operates as a standalone analog-controlled device with no embedded microprocessor, digital interface, or connectivity options (e.g., USB, Bluetooth, RS-232). Speed is adjusted via a calibrated rotary knob with tactile feedback; no digital display or programmable presets are included. As such, it does not support FDA 21 CFR Part 11-compliant electronic records, automated calibration logs, or remote parameter monitoring. This simplicity enhances long-term reliability and reduces firmware-related obsolescence—making it particularly appropriate for teaching labs, pilot-scale process development, or auxiliary mixing roles where deterministic, repeatable manual operation is prioritized over digital integration.

Applications

• Routine sample homogenization prior to pH measurement, conductivity analysis, or spectrophotometric quantification.
• Supporting titration workflows by ensuring uniform reagent dispersion and endpoint consistency.
• Preparation of standard solutions, buffer dilutions, and stock reagent mixes in QC/QA laboratories compliant with ISO 17025 or CLIA guidelines.
• Cell suspension maintenance during short-term viability assays or staining protocols where gentle, continuous agitation prevents sedimentation without shear-induced damage.
• Integration into multi-step analytical workflows—e.g., as a pre-mixing stage before autosampler injection in HPLC or ICP-MS sample introduction systems.

FAQ

Does the JB-10 include heating functionality?
No—the JB-10 is a magnetic stirrer only. It does not incorporate a heating element. For combined stirring and heating, refer to Leici’s dual-function hotplate stirrer series (e.g., JB-50H or RH-10).
Is the unit suitable for use with corrosive solvents such as concentrated HCl or acetone?
Yes—the ceramic-coated top plate and sealed internal components resist degradation from common laboratory solvents and diluted acids/bases. However, prolonged exposure to aggressive oxidizers (e.g., hot nitric acid) or halogenated solvents at elevated temperatures is not recommended.
Can the JB-10 be used inside a CO₂ incubator or cold room?
It is rated for ambient operation between 5–40°C and 20–80% relative humidity (non-condensing). Operation in controlled-environment chambers requires verification of local electrical safety compliance and physical clearance for ventilation.
What stir bar size is optimal for 500 mL of deionized water?
A 25 × 6 mm PTFE-coated stir bar typically achieves efficient vortex formation and uniform mixing at 400–800 rpm; adjust speed incrementally to avoid splashing while ensuring complete circulation.
Does Leici provide calibration documentation or traceable certification with the JB-10?
No factory-issued calibration certificate is included. Users performing critical mixing steps under ISO/IEC 17025 or GxP frameworks should implement in-house verification using a calibrated tachometer and documented SOPs.