Magnetic stirring bath

Introduction

A magnetic stirring bath is a laboratory instrument that combines a water bath with a magnetic stirrer, used to heat and stir the samples simultaneously at a controlled temperature, and it is used in the chemistry, the biology, the clinical, and the research laboratories for the reactions and the processes that require the heating and the mixing. The magnetic stirring bath consists of a water bath tank with the heating and the temperature control, and one or more magnetic stirrers under the bath, which rotate the magnetic stir bars in the containers placed in the bath, and it provides a stable and a uniform temperature and a continuous stirring, with features such as the digital temperature control, the speed control, and the timer; the magnetic stirring bath is used for the heating and the stirring of the reactions, for the dissolution and the mixing of the reagents, for the incubation of the samples at a constant temperature with the stirring, for the preparation of the solutions, for the reactions that require the uniform mixing and the temperature, and for many other applications, and it is used in the laboratories; the magnetic stirring bath is available in various sizes and configurations, with the different bath capacities and the numbers of the stirring positions, and it is an essential instrument for the temperature-controlled and the stirred processing. Magnetic stirring baths are used in the chemistry and the biology laboratories, in the clinical laboratories, in the pharmaceutical industry, in the food industry, and for many other applications. With their combined heating and stirring, magnetic stirring baths are essential for the reactions in the laboratory.

Magnetic Stirring Bath LMSB-T2010

Magnetic Stirring Bath offers a maximum flask volume of 2 heating pipe offering a temperature range of RT + 5℃ to 100℃. The stirrer operates with a brushless motor, ensuring a long lif...

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Magnetic Stirring Bath LMSB-T2010

Magnetic Stirring Bath offers speed range of 100 to 1500 rpm, with ±10 rpm accuracy, ensuring precise rotational control. Its built-in magnetic stirring function ensures continuous and ...

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Magnetic Stirring Bath LMSB-T2011

Magnetic Stirring Bath offers maximum flask volume of 5L with single position ensures efficient mixing capacity. Provides both heating and stirring functions simultaneously, allowing for...

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Standards

ASTM E2488-09(2014)-Standard Guide for the Preparation and Evaluation of Liquid Baths Used for Temperature Calibration by Comparison

Complies with the above standards, but is not limited to them.

Features

1. Magnetic stirring bath for simultaneous heating/cooling and magnetic stirring of samples.

2. Combination water/oil bath with magnetic stirrer for temperature-controlled stirring reactions.

3. Suitable for chemistry, biology, pharmaceutical, material science and industrial lab applications.

4. Includes bath tank, heater/cooler, magnetic stirrer, controller, stir bars and manual.

5. Supports temperature control (ambient to 100/200 C) with stirring for multiple samples.

FAQ

Q1: What testing scenarios is this bath mainly applied to?

A: The magnetic stirring bath combines a temperature-controlled water/oil bath with magnetic stirring, allowing samples to be heated/cooled and stirred simultaneously. Used in chemistry (synthesis reactions requiring controlled temp and stirring (organic synthesis, crystallization, dissolution, titration), sample prep, digestion), biology (enzyme reactions, incubation, cell culture media prep, hybridization), pharmaceutical (API synthesis, dissolution testing, stability sample prep, formulation), material science (polymer dissolution, nanoparticle synthesis, coating prep), and industrial labs (quality control, sample prep, reaction optimization). Types: water bath (ambient to 100 C, water as medium), oil bath (up to 180-250 C, silicone/mineral oil for higher temp), circulating bath (pump for external circulation), multi-position (stir multiple samples simultaneously). Magnetic stirrer uses rotating magnetic field to drive PTFE-coated stir bar in vessel. Temp range ambient to 100 C (water) or 200 C (oil), stirring 100-1500 rpm, 1-15 positions. Digital controller with timer, over-temp protection.

Q2: What standards does the bath comply with?

A: Complies with IEC 61010 (lab electrical safety, specifically IEC 61010-2-010 for heating/lab equipment), ISO 17025 (if used in accredited lab), FDA/CE (medical device if clinical/pharma), and GB/T standards. Hardware meets temp accuracy (+/-0.1-0.5 C), uniformity (+/-0.2-1 C in bath), stirring speed accuracy, over-temp protection (independent safety thermostat), and material compatibility (stainless steel bath, PTFE stir bars). For pharma dissolution (USP <711>, EP 2.9.3), use calibrated dissolution apparatus (this is general bath, not dissolution tester - but can be used for sample prep). For GMP/clinical, follow cGMP and IQ/OQ. For oil bath >100 C, use high-temp oil (silicone, mineral) and fire safety (oil flash point). Water quality: use distilled/DI water to prevent scale/corrosion.

Q3: What is the warranty period for the whole bath and key components?

A: Whole bath covered 12-24 months (some 3 years). Heating element (wear - scale buildup, burnout 2-7 years), magnetic stirrer motor/drive (wear - 3-7 years), temperature sensor (drift - 3-7 years), bath tank (corrosion - 5-15 years, water quality dependent), and stir bars (consumable - PTFE coating wears, replace) are key. Damage from improper use, running dry (water/oil level low - heater burnout, fire risk for oil), using tap water (scale/corrosion - use DI), oil overheating (above flash point - fire; use oil with appropriate flash point, monitor temp), spills (liquid on electronics), stir bar jumping (out of vessel - can scratch tank, stop stirring), or unauthorized repair is excluded. Extended warranty available. Heater 2-7 years (water quality); stirrer motor 3-7 years; tank 5-15 years; stir bars consumable.

Q4: Is this device difficult to operate? Is professional training required?

A: Simple: fill bath with water (to level) or oil, place sample vessel(s) in bath, add stir bar to vessel, set temp and stirring speed, turn on heater and stirrer, monitor temp (allow 10-30 min to equilibrate), use timer if needed. No professional training required for basic use, but hot oil and chemical safety important. Training half day. Safety: HOT SURFACES/HOT OIL (bath at 100 C water or 150-200 C oil - severe burns; use heat-resistant gloves, tongs; oil can splatter when wet - ensure vessels dry before placing in oil; do not exceed oil flash point (silicone ~300 C, mineral ~180 C); have fire extinguisher Class B nearby for oil), WATER/ELECTRICAL (water near electricity - use GFCI, do not spill on controls, unplug before cleaning), STIR BAR (can jump out of vessel at high speed or if vessel too large - use appropriate size, lower speed; PTFE coating can chip - replace if damaged (exposed magnet corrodes)), CHEMICAL (samples may be corrosive/flammable/toxic - fume hood for volatile/hazardous, PPE; do not heat flammable solvents in open bath (use sealed vessel, fume hood, explosion-proof if required)), OVER-TEMP (use independent safety thermostat, do not leave unattended at high temp, timer), do not run dry (check fluid level before turning on heater - dry heater burns out, oil fire), do not use metal vessels with magnetic stirrer (interferes with magnetic field, can scratch - use glass/plastic), water bath: use distilled/DI water, add biocide/algae inhibitor, change water regularly (prevents biofilm/corrosion), drain when not in use for long periods, oil bath: use oil rated for temp (silicone for >150 C), do not mix oils, replace oil when degraded (dark, viscous, smoking), clean tank periodically, for multiple positions: ensure all vessels have stir bars, balanced load, for viscous samples: use larger stir bar, lower speed (high viscosity can decouple stir bar), for low temp (below ambient): use circulating bath with refrigeration (standard heating bath cannot cool below ambient).

Q5: What is the typical lead-time for order delivery?

A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.

Q6: Is regular calibration required? What is the recommended calibration cycle?

A: Calibrate temperature every 6-12 months with calibrated thermometer/RTD at setpoint (verify accuracy and uniformity at multiple bath locations). Stirring speed can be verified with tachometer (if critical). Routine: check fluid level (daily), clean bath (weekly/monthly - drain, wipe, refill), inspect stir bars (wear), and check over-temp protection (test periodically). For ISO 17025/GMP, maintain calibration records (RTD traceable, as-found/as-left, uniformity mapping) and IQ/OQ. Recalibrate after sensor replacement, heater replacement, relocation, or drift. For critical reactions (pharmaceutical synthesis), verify temp before each batch. Water quality affects heater life and temp uniformity - maintain.

Q7: Are supporting consumables universal?

A: Stir bars (PTFE-coated, various sizes/shapes - universal lab supply, but match to vessel size), bath fluid (silicone oil, mineral oil, DI water - universal, use correct grade), temperature probes (specific to controller), and gaskets (specific) are available. Long-term cost: stir bars (consumable, low), bath oil (periodic replacement), electricity, and occasional heater/sensor replacement. Very low ongoing cost.

Q8: Can I customize parameters or supporting accessories?

A: Customization includes bath type (water (to 100 C), oil (to 200 C), circulating (with pump for external jacketed vessels), refrigerated (below ambient to -20 C)), volume (2-30 L), stirring positions (1, 2, 4, 6, 10, 15 - independent or synchronized speed), temp range (ambient-100 C water, ambient-200 C oil, -20 to 100 C refrigerated), control (digital PID, analog, timer, programmable ramp/dwell, external probe control), features (over-temp protection, low-fluid shutoff, digital display, USB/data logging, RS232/485, stainless steel tank, transparent tank (polycarbonate for visibility), drain valve, pump (circulating models)), safety (explosion-proof (ATEX for flammable vapors), independent safety thermostat), accessories: stir bars (various sizes), bath oil (silicone/mineral), test tube racks, vessel holders, external temperature probe, pump tubing (circulating), calibration thermometer, validation package (IQ/OQ/PQ), certifications (CE, IEC 61010, UL, FDA if medical).

Q9: Does the purchase include on-site installation and commissioning service?

A: Standard delivery includes bath, stirrer, controller, initial stir bars, power cord, manual (bath oil, extra stir bars separate). On-site installation not required for standard (unbox, fill with water/oil, use). On-site training not needed for basic use. For GMP/pharma-grade or circulating/refrigerated models, IQ/OQ available at additional cost. Always verify temp with calibrated thermometer before critical use. For oil bath, ensure oil level correct and flash point adequate.

Q10: What types of samples are compatible with this equipment?

A: Compatible: glass/plastic vessels (beakers, flasks, vials) with aqueous/organic samples requiring heating and stirring: chemical reactions, dissolutions, crystallizations, incubations, sample prep, emulsions. Not compatible: metal vessels (interfere with magnetic field, scratch tank - use hotplate with overhead stirrer for metal), samples requiring >200 C (use heating mantle/sand bath, not oil bath - oil degrades/fire), samples requiring precise cooling below ambient (use refrigerated circulating bath), large volumes beyond bath capacity, highly viscous samples without appropriate stir bar/speed, or flammable solvents in open vessel without fume hood/explosion-proof (fire risk). For oil bath: ensure vessels dry (water in oil causes splattering), do not exceed oil flash point. For water bath: use distilled/DI water, add biocide. Stir bar size: match to vessel (too small = no stirring, too large = jumps/dead spot). For anaerobic/air-sensitive reactions: use sealed vessel with septum, inert gas purge (bath can accommodate).