Yarong B-260 Precision Constant-Temperature Water Bath

Overview

The Yarong B-260 Precision Constant-Temperature Water Bath is an engineered laboratory thermal platform designed for stable, uniform heat transfer to samples immersed in aqueous or water-miscible media. Operating on the principle of convection-driven thermal equilibrium within a thermostatically controlled liquid reservoir, the B-260 maintains precise temperature setpoints across its bath chamber using a PID-regulated heating element and integrated platinum resistance thermometer (PT100) feedback loop. Its operational range spans from ambient temperature up to 99 °C — a critical threshold for applications requiring sterilization, enzyme incubation, sample equilibration, or solvent-controlled reaction kinetics without boiling. The unit’s compact footprint and robust stainless-steel bath chamber support routine use in QC labs, academic teaching environments, and R&D settings where reproducible thermal conditioning is essential but high-end programmability is not required.

Key Features

• Stable thermal control with ±1 °C accuracy across the full operating range (ambient to 99 °C), verified under steady-state conditions per ISO 17025-aligned calibration practices.
• 1 kW heating system ensures rapid thermal recovery after sample loading or setpoint adjustment, minimizing downtime between experimental cycles.
• Stainless-steel bath chamber (26 × 15 cm) provides corrosion resistance and long-term dimensional stability; compatible with standard laboratory glassware including beakers, flasks, and test tube racks.
• Compact external dimensions (36 × 29 × 23 cm) enable integration into space-constrained benchtop workflows without compromising thermal capacity or accessibility.
• Direct-manufactured design by Yarong Biochemical Instrument Factory (Shanghai) ensures traceability, consistent build quality, and compliance with GB/T 25131–2010 (Chinese national standard for laboratory water baths).

Sample Compatibility & Compliance

The B-260 accommodates a wide range of sample containers, including borosilicate glass vessels up to 500 mL volume, plastic centrifuge tubes, and enzymatic assay plates when used with appropriate support fixtures. It supports immersion-based protocols aligned with ASTM D1545 (viscosity measurement), USP (compounding environment stabilization), and ISO 8573-1 (compressed air moisture testing via chilled-mirror equilibration). While not certified for Class I Div 1 hazardous locations, the unit meets CE marking requirements for electrical safety (EN 61010-1) and electromagnetic compatibility (EN 61326-1). Its construction materials comply with RoHS Directive 2011/65/EU, and all internal wetted surfaces are non-leaching and inert toward common buffer systems (e.g., PBS, Tris-HCl, citrate).

Software & Data Management

The B-260 operates via an analog-digital hybrid controller interface featuring a dual-digit LED display and tactile rotary knob for intuitive setpoint entry. It does not include onboard data logging, remote connectivity, or PC software integration. Temperature verification and periodic performance validation must be conducted using externally calibrated reference thermometers traceable to NIST or CNAS-accredited standards. For GLP/GMP-regulated environments, users are advised to document manual temperature readings at defined intervals (e.g., every 15 minutes during critical incubations) and retain records per 21 CFR Part 11-compliant archival procedures when paired with validated electronic lab notebooks (ELNs) or LIMS platforms.

Applications

• Enzyme activity assays requiring thermal stabilization at 37 °C, 60 °C, or other physiologically relevant temperatures.
• Pre-warming of culture media, reagents, and agarose gels prior to electrophoresis or microbial plating.
• Controlled dissolution testing of pharmaceutical dosage forms per USP .
• Accelerated stability studies for chemical intermediates and polymer solutions under isothermal conditions.
• Calibration support for temperature-sensitive analytical instruments such as viscometers, densitometers, and refractometers.

FAQ

Is the B-260 suitable for use with organic solvents?
No — the bath is designed exclusively for water and water-miscible fluids. Use of flammable or corrosive solvents (e.g., acetone, chloroform, strong acids/bases) is prohibited due to material compatibility and safety limitations.
Does the unit include a lid or cover?
The standard configuration does not include an insulated lid; however, third-party acrylic or polycarbonate covers may be added to reduce evaporation and improve thermal efficiency during extended operation.
What maintenance is required to ensure long-term accuracy?
Monthly inspection of bath fluid level and visual check for scale accumulation; annual verification of sensor drift using a certified reference thermometer; descaling with 5% citric acid solution if mineral deposits are observed.
Can the B-260 be stacked or installed in enclosed cabinetry?
No — adequate top and rear ventilation clearance (minimum 10 cm) is mandatory to prevent thermal overload of the heating circuit and ensure compliance with EN 61010-1 cooling requirements.
Is factory calibration documentation provided with shipment?
A basic conformity certificate indicating compliance with GB/T 25131–2010 is included; full calibration reports with uncertainty budgets require optional purchase and on-site verification by authorized metrology service providers.