Otisience AM-5250B Magnetic Stirrer
| Brand | Otisience |
|---|---|
| Origin | Tianjin, China |
| Model | AM-5250B |
| Stirring Capacity | 20 L |
| Speed Range | 0–1600 rpm |
| Temperature Control Range | Ambient to 300 °C |
| Heating Plate Max Temp | 350 °C |
| Control Type | Digital |
| Temperature Accuracy | ±2 °C |
| Heating Plate Diameter | 150 mm |
| Max Heating Power | 350 W |
| Power Supply | 220 V / 50 Hz |
| Dimensions (W×D×H) | 198 × 225 × 115 mm |
| Weight | 2.4 kg |
Overview
The Otisience AM-5250B Magnetic Stirrer is a digitally controlled, benchtop laboratory instrument engineered for precise and reproducible mixing of liquid samples under heated conditions. It operates on the principle of magnetic coupling: a rotating permanent magnet or electromagnetic drive beneath the ceramic-coated heating plate induces rotational motion in a PTFE- or glass-coated stir bar immersed in the sample vessel. This non-contact mechanism eliminates mechanical shaft seals, reduces contamination risk, and supports operation in closed or sterile environments. Designed for routine use in analytical chemistry, pharmaceutical formulation, materials synthesis, and quality control laboratories, the AM-5250B delivers stable rotational speed across its full 0–1600 rpm range—maintaining consistent torque output regardless of minor fluctuations in line voltage. Its integrated heating system enables simultaneous stirring and temperature control from ambient up to 300 °C, with a maximum heating plate surface temperature of 350 °C for rapid thermal equilibration.
Key Features
- Digital microprocessor-based speed and temperature control with LED display for real-time parameter monitoring
- Stable speed regulation independent of input voltage variation—ensures consistent shear profile during viscosity-sensitive reactions
- Ceramic-coated aluminum heating plate (Ø150 mm) offering uniform thermal distribution and chemical resistance
- High-power 350 W heating element enabling rapid ramp-up to target temperatures, particularly beneficial for high-boiling-point solvents
- Compact footprint (198 × 225 × 115 mm) and lightweight design (2.4 kg) optimized for space-constrained fume hoods and shared lab benches
- ±2 °C temperature accuracy across the full operating range, verified per internal calibration protocol traceable to NIST-standard reference thermometers
Sample Compatibility & Compliance
The AM-5250B accommodates standard laboratory glassware including beakers (up to 20 L capacity), Erlenmeyer flasks, and round-bottom flasks—provided stir bar geometry and size are matched to vessel dimensions and fluid viscosity. Compatible with aqueous, organic, and mildly corrosive media when using chemically inert stir bars (e.g., PTFE-coated or encapsulated samarium-cobalt magnets). The unit complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and meets EMC requirements per EN 61326-1:2013. While not certified for use in explosion-proof or Class I/Div 1 hazardous locations, it is suitable for general-purpose applications under standard GLP-compliant laboratory practices. No built-in audit trail or 21 CFR Part 11 functionality; users requiring electronic record integrity must integrate external logging systems.
Software & Data Management
The AM-5250B operates as a standalone analog-digital hybrid instrument with no embedded firmware update capability or USB/RS-232 connectivity. All operational parameters—including setpoints and real-time readings—are displayed locally via dual seven-segment LEDs. No proprietary software is required or provided. For laboratories implementing digital workflow standards (e.g., ISO/IEC 17025 or FDA-regulated environments), manual entry of operating conditions into ELN systems is recommended. Temperature and speed settings may be recorded alongside batch identifiers, reaction timestamps, and analyst initials to satisfy basic traceability requirements.
Applications
- Homogenization of reagent solutions prior to HPLC or GC analysis
- Heated dissolution testing of active pharmaceutical ingredients (APIs) per USP <711>
- Synthesis of metal-organic frameworks (MOFs) and nanoparticle dispersions requiring prolonged thermal agitation
- Buffer preparation and pH adjustment workflows in molecular biology labs
- Preparation of calibration standards for spectrophotometric and electrochemical methods
- Accelerated stability studies involving temperature-dependent degradation kinetics
FAQ
Does the AM-5250B support programmable ramping or multi-step temperature profiles?
No. It features fixed-setpoint control only; users must manually adjust speed or temperature during operation.
Is the heating plate compatible with borosilicate glass vessels of varying thickness?
Yes—its uniform heat distribution and 350 °C surface limit accommodate standard 1–5 mm wall thickness glassware without thermal stress cracking under normal use.
Can the unit be used in inert-atmosphere gloveboxes?
Yes, provided ventilation and power feedthroughs meet glovebox specifications; the absence of moving external components makes it suitable for sealed environments.
What stir bar length is recommended for optimal performance at 20 L volume?
A 80–100 mm elliptical or cross-shaped PTFE-coated stir bar is advised to ensure laminar flow and avoid vortexing in large-diameter containers.
Is calibration documentation provided with shipment?
A factory-issued calibration certificate for temperature and speed verification is available upon request at time of order; default delivery includes only operational instructions and safety warnings.
