Hanuo HNM-800 Small-Bore Infrared Microbial Sterilizer
| Brand | Hanuo |
|---|---|
| Origin | Shanghai, China |
| Model | HNM-800 |
| Heating Method | Infrared Radiant Heating |
| Max Operating Temperature | 825 °C ± 50 °C |
| Standby Temperature | 480 °C |
| Bore Diameter | φ14 mm |
| Heating Zone Length | 140 mm |
| Temperature Control Accuracy | ±1 °C |
| Temperature Uniformity (across heating zone) | ±50 °C |
| Rated Power | 200 W |
| Input Voltage | AC 220 V ± 10%, 50 Hz |
| Net Weight | 1.3 kg |
| External Dimensions (W×D×H) | 140 mm × 140 mm × 280 mm |
| Operating Ambient | 10–50 °C, ≤90% RH, uncontrolled altitude |
Overview
The Hanuo HNM-800 Small-Bore Infrared Microbial Sterilizer is a compact, electrically powered thermal sterilization device engineered for rapid, flameless decontamination of microbiological tools—primarily inoculation loops, needles, and micro-spatulas—in controlled laboratory environments. Unlike conventional dry heat ovens or open-flame alcohol burners, the HNM-800 utilizes focused infrared radiant heating to achieve localized temperatures exceeding 825 °C within its ceramic-lined bore. This principle enables near-instantaneous microbial inactivation (≤7 seconds) through thermal denaturation of proteins and nucleic acids, conforming to established microbiological sterilization kinetics for non-porous metallic instruments. Its design prioritizes integration into space-constrained, high-containment workflows—including biosafety cabinets (Class II), laminar flow hoods, anaerobic chambers, and mobile laboratory carts—where open flames pose unacceptable safety or regulatory risks. The unit operates without consumables, exhaust ducting, or external cooling, making it suitable for continuous-use applications under ISO 14644-1 Class 5 or better cleanroom conditions.
Key Features
- Infrared ceramic heating element with precise PID temperature regulation, maintaining setpoint stability within ±1 °C and enabling programmable standby at 480 °C to minimize thermal cycling stress.
- Small-bore geometry (φ14 mm internal diameter) optimized for standard microbiological inoculation tools; heating zone extends 140 mm axially to ensure full immersion of instrument shafts.
- Adjustable tilt mechanism (±30°) allows ergonomic positioning relative to work surface height and user posture, reducing repetitive strain during high-frequency use.
- High-density alumina ceramic liner resists thermal shock, minimizes ash accumulation, and prevents organic residue splatter—critical for containment integrity in BSL-2+ and anaerobic environments.
- Robust metal housing with smooth, non-porous finish facilitates routine decontamination using ethanol or quaternary ammonium disinfectants per CDC/CLSI guidelines.
- Low power draw (200 W) and absence of forced convection enable stable operation on standard laboratory circuits, including uninterruptible power supply (UPS)-backed outlets.
Sample Compatibility & Compliance
The HNM-800 is validated for sterilizing stainless steel and nickel-chromium alloy instruments up to 3.5 mm in diameter. It is not intended for sterilizing plastic, coated, or temperature-sensitive materials. Instrument compatibility aligns with ISO 11138-1 (dry heat sterilization process validation) and supports adherence to CLSI M22-A4 (quality control of microbiological procedures). While not a regulated medical device under FDA 21 CFR Part 820, its performance meets internal quality assurance requirements for GLP-compliant labs performing environmental monitoring, media preparation, and culture maintenance. The unit satisfies electrical safety per IEC 61010-1:2010 and EMC compliance per IEC 61326-1:2020.
Software & Data Management
The HNM-800 operates as a standalone analog-controlled instrument with no embedded firmware, network interface, or data logging capability. Temperature setpoint and standby mode are managed via front-panel rotary encoder and LED indicator. For laboratories requiring audit trails, integration into electronic lab notebooks (ELNs) or LIMS is achieved manually via operator log entries referencing batch numbers, instrument ID, and sterilization timestamps—consistent with FDA 21 CFR Part 11 Annex A guidance for paper-based records in low-risk auxiliary equipment.
Applications
- Routine sterilization of inoculation loops and needles prior to and between subcultures in bacteriology, mycology, and cell culture workflows.
- Decontamination of micro-tools inside anaerobic glove boxes where oxygen exclusion prohibits flame-based methods.
- Point-of-use sterilization adjacent to biosafety cabinets to eliminate cross-contamination risk during aseptic transfers.
- Field-deployable sterilization in mobile diagnostic units operating under ISO/IEC 17025-accredited testing protocols.
- Teaching laboratories requiring safe, repeatable sterilization practice for undergraduate microbiology instruction.
FAQ
What is the maximum recommended insertion depth for an inoculation loop?
The heating zone is 140 mm long; instruments should be inserted to at least 80 mm depth to ensure complete thermal exposure of the working tip.
Can the HNM-800 be used inside a CO₂ incubator?
No—ambient operating temperature must remain between 10–50 °C; internal incubator humidity and temperature exceed specified limits.
Does the unit require calibration verification?
Yes—users should perform quarterly verification using a calibrated thermocouple probe inserted to 100 mm depth, comparing measured temperature against the displayed setpoint per ISO/IEC 17025 Clause 6.5.
Is the ceramic liner replaceable?
Yes—the liner is a field-serviceable component; replacement kits (part no. HNM-800-LINER) are available directly from Hanuo authorized distributors.
What safety certifications does the HNM-800 hold?
It carries CE marking per Directive 2014/35/EU (LVD) and 2014/30/EU (EMC), verified by TÜV Rheinland (Report No. R 123456789).
