IKA RH basic 1 Heating Magnetic Stirrer

Overview

The IKA RH basic 1 Heating Magnetic Stirrer is an entry-level yet robust benchtop instrument engineered for reliable, repeatable heating and magnetic stirring in routine laboratory workflows. Based on the principle of contactless torque transmission via rotating magnetic fields—generated by a permanent magnet array driven by a synchronous motor—the device induces rotation of PTFE- or ceramic-coated stir bars immersed in liquid samples. Its integrated aluminum heating plate delivers uniform thermal distribution across the working surface, enabling precise temperature regulation during mixing. Designed for general-purpose applications in chemistry, biology, quality control, and materials preparation labs, the RH basic 1 provides foundational functionality without compromising mechanical stability or thermal consistency. The unit complies with IEC 61010-1 safety standards for laboratory electrical equipment and features overtemperature protection to prevent uncontrolled thermal escalation.

Key Features

• Stirring capacity up to 15 L (water-equivalent volume), suitable for medium-scale reaction vessels including beakers, flasks, and crystallization dishes
• Adjustable speed range from 100 to 2000 rpm with analog dial control and calibrated scale for intuitive setting and reproducible operation
• Heating plate temperature range of 50–320 °C, with mechanical thermostat-based regulation ensuring stable setpoint maintenance under load
• Durable aluminum heating plate with scratch-resistant anodized surface and optimized thermal mass for rapid heat-up and minimal overshoot
• Compact footprint and low-noise motor design, supporting continuous operation in shared lab environments without vibration transfer
• No digital interface or data logging—intentionally simplified for ease of use, reduced maintenance, and long-term reliability in high-throughput settings

Sample Compatibility & Compliance

The RH basic 1 accommodates standard glassware (e.g., borosilicate beakers and round-bottom flasks) and compatible plastic containers rated for temperatures up to 320 °C. Stir bar selection must match vessel geometry and viscosity requirements—common sizes include 20 mm × 6 mm and 40 mm × 8 mm PTFE-coated rods. The instrument is not intended for use with highly viscous non-Newtonian fluids (>10,000 mPa·s) or abrasive slurries that may compromise stir bar integrity. It meets CE marking requirements per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD), and conforms to ISO/IEC 17025-relevant operational stability criteria when used within defined environmental conditions (20–25 °C ambient, ≤70% RH). No built-in audit trail or electronic record capability; therefore, it is classified as a Class A standalone device under FDA 21 CFR Part 11 guidance—requiring manual logbook documentation for GLP/GMP-regulated work.

Software & Data Management

The RH basic 1 operates exclusively via analog controls and does not incorporate microprocessor-based firmware, USB connectivity, or software integration. All operational parameters—including speed and plate temperature—are set manually using calibrated dials. No firmware updates, driver installation, or third-party software compatibility is supported or required. This architecture eliminates cybersecurity exposure, reduces validation burden in regulated environments, and ensures consistent behavior across decades of service life. Users maintain traceability through handwritten or spreadsheet-based logs referencing batch numbers, calibration dates, and usage records—aligned with traditional paper-based SOP frameworks common in academic teaching labs and small-scale industrial QC units.

Applications

• Preliminary dissolution testing of pharmaceutical excipients and active ingredients under controlled thermal conditions
• Buffer and reagent preparation in molecular biology workflows, including Tris-HCl, PBS, and agarose solution homogenization
• Catalyst suspension and slurry conditioning in synthetic organic chemistry protocols
• Pre-heating and homogenization of polymer melts prior to rheological characterization or casting
• Standardized sample conditioning for ASTM D92 (flash point), ASTM D86 (distillation), and ISO 3104 (kinematic viscosity) test preparations
• Supporting gravimetric standardization procedures where thermal equilibration and mixing must occur simultaneously but independently of automated systems

FAQ

Is the RH basic 1 suitable for use with corrosive solvents such as concentrated acids or halogenated organics?
Yes—provided the stir bar coating (PTFE or glass-coated) remains intact and the vessel material is chemically compatible. Avoid direct contact between aggressive media and the aluminum heating plate surface.
Does this model support external temperature probe feedback for PID-controlled heating?
No. Temperature regulation is solely based on the built-in bimetallic thermostat; no external sensor input or closed-loop correction is available.
Can the unit be operated continuously for 24 hours?
Yes, under nominal load conditions (≤10 L water at ≤250 °C) and with adequate ventilation. Continuous operation beyond 8 hours at maximum temperature (320 °C) is not recommended due to thermal stress on internal components.
What is the expected service life under routine academic lab use?
With proper cleaning and avoidance of thermal shock, the unit typically exceeds 10 years of functional service—consistent with IKA’s documented mean time between failures (MTBF) for basic-series stirrers.
Is calibration required before first use?
No factory calibration is shipped with the unit. However, users should verify speed accuracy using a handheld tachometer and confirm plate temperature with a NIST-traceable thermometer prior to critical applications.