BOXUN YXQ-LB-50SII Benchtop Horizontal Steam Sterilizer

Overview

The BOXUN YXQ-LB-50SII is a benchtop horizontal steam sterilizer engineered for precision, safety, and regulatory compliance in laboratory, clinical, and agricultural settings. It operates on the validated principle of saturated steam under pressure—leveraging the thermodynamic properties of moist heat to achieve microbial inactivation through protein denaturation and nucleic acid disruption. Designed in accordance with ISO 17665-1:2019 (Sterilization of health care products — Moist heat — Part 1: Requirements for the development, validation and routine control of a sterilization process for medical devices), the unit delivers reproducible sterilization cycles at temperatures up to 135 °C and pressures up to 0.22 MPa (2.2 bar gauge). Its 50-liter chamber volume supports routine processing of wrapped instruments, unwrapped metal tools, glassware, liquid media (including agar-based and nutrient broths), and porous loads such as gauze and cotton rolls—making it suitable for both small-scale research labs and satellite sterilization points in multi-department facilities.

Key Features

• Manual quick-opening lever door with integrated mechanical and electronic safety interlock: prevents door opening until chamber pressure drops to atmospheric level and temperature falls below 80 °C, satisfying EN 285:2015 requirements for steam sterilizer door safety.
• SUS304 stainless steel construction throughout—including chamber, inner basket, and structural housing—ensures long-term resistance to corrosion from repeated exposure to condensate, alkaline cleaning agents, and saline residues.
• Microprocessor-controlled cycle management with programmable parameters: users can define sterilization time, holding temperature (115–135 °C), pre-vacuum pulses (for porous load conditioning), and post-sterilization drying phases where applicable.
• Automatic cold air removal via gravity displacement or optional vacuum-assisted purge ensures uniform steam penetration and eliminates air pockets that compromise sterility assurance.
• Redundant safety systems: dual independent temperature sensors, pressure transducer with overpressure relief valve (set at 0.25 MPa), low-water-level detection with automatic heater cutoff, and audible/visual end-of-cycle notification.
• Integrated sterilization validation port (sample test port): enables real-time monitoring of chamber conditions using external thermocouples or biological indicators during qualification and routine performance verification.

Sample Compatibility & Compliance

The YXQ-LB-50SII accommodates a broad spectrum of load types including surgical instruments, Petri dishes, Erlenmeyer flasks, pipette tips, textile dressings, and liquid volumes up to 3 L per container. Load configuration follows ISO 11140-1:2014 guidelines for steam penetration testing and complies with national standards GB 8599–2008 (China) and international references such as ANSI/AAMI ST79:2017. All operational logic and alarm thresholds are traceable to factory calibration records. The system supports documentation integrity for GLP and GMP environments when paired with the optional thermal printer module, enabling hard-copy cycle logs compliant with FDA 21 CFR Part 11 data retention expectations (when used with appropriate access controls and audit trail configuration).

Software & Data Management

While the YXQ-LB-50SII employs an embedded microcontroller rather than PC-based software, its digital interface provides full-cycle parameter logging—including start time, actual temperature/pressure profiles, dwell duration, and fault codes—with timestamps stored in non-volatile memory. Cycle history retains up to 100 completed runs. When equipped with the optional thermal printer, each printed record includes operator ID (manually entered), cycle number, date/time stamp, setpoints vs. actuals, and pass/fail status based on predefined acceptance criteria. These outputs serve as primary evidence for internal quality audits and third-party inspections aligned with ISO 9001 and ISO 13485 frameworks.

Applications

• Routine sterilization of reusable laboratory glassware and metal instrumentation in academic and industrial R&D labs.
• Preparation of microbiological growth media (e.g., LB broth, Sabouraud dextrose agar) without degradation of heat-labile nutrients.
• Decontamination of biohazardous waste prior to autoclave disposal in biosafety level 2 (BSL-2) containment areas.
• Validation support for sterilization process development, including mapping studies using calibrated thermocouples inserted via the standard sample test port.
• Agricultural seed treatment and soil media sterilization for controlled-environment plant physiology experiments.

FAQ

What is the maximum recommended fill volume for liquid loads in this sterilizer?
For safe operation and avoidance of boil-over, liquid containers should be filled to no more than 75% of total capacity; total liquid volume per cycle must not exceed 3 L per vessel and 15 L across the entire chamber.
Does the unit support vacuum-assisted air removal?
The base model uses gravity displacement; however, vacuum-assisted pre-sterilization pulsing is available as a configurable option upon request—enhancing efficacy for wrapped or porous items per ISO 17665 Annex B recommendations.
Is the sterilizer compatible with biological indicators (BIs) and chemical integrators?
Yes—biological indicators (e.g., Geobacillus stearothermophilus spore strips) and Class 5 integrating indicators may be placed inside challenge packs and monitored via the built-in sample test port or chamber-mounted ports.
How frequently should the safety valves and pressure transducers be recalibrated?
Per manufacturer guidance and ISO 13485 requirements, annual third-party calibration of all critical sensors and relief devices is recommended; internal functional checks should be performed daily prior to first use.
Can the cycle log data be exported electronically?
No native USB or network interface is provided; data export relies on the optional thermal printer for physical records. For digital archiving, users may manually transcribe or integrate with external data acquisition systems via analog output signals (available on request).