HJ FX-1S Nucleic Acid Sampling Booth

Overview

The HJ FX-1S Nucleic Acid Sampling Booth is an engineered biosafety enclosure designed for standardized, low-risk collection of oropharyngeal and nasopharyngeal swabs in high-throughput public health screening environments. It operates on the principle of controlled positive-pressure ventilation: a dedicated centrifugal fan draws ambient air through a certified HEPA filter (ISO Class 5 / ISO 14644-1 compliant at 0.3 µm), delivering purified air into the operator compartment at a sustained positive pressure differential (>15 Pa relative to ambient). This pressure gradient prevents unfiltered external air from infiltrating the workspace, thereby establishing a physical barrier between healthcare personnel and potentially infectious aerosols generated during sampling. Unlike conventional PPE-dependent workflows, the FX-1S decouples operator protection from personal protective equipment constraints—eliminating heat stress, mobility limitations, and consumable dependency while maintaining ISO 14644-1 cleanroom-grade air quality (Class 10,000 equivalent) within the enclosed volume. Its structural design supports deployment in outdoor, semi-outdoor, or indoor transitional zones without requiring building-integrated HVAC infrastructure.

Key Features

• Modular prefabricated panel construction enables rapid site installation and repositioning; no civil works or permanent utility tie-ins required.
• Integrated HEPA filtration system with ≥99.995% efficiency at 0.3 µm particle size, validated per IEST-RP-CC001.6 and EN 1822-1 standards.
• Dual-layer isolation interface: laminated tempered glass viewport with integrated long-reach nitrile gloves (EN 455-compliant) and full-duplex intercom system for real-time voice communication.
• Onboard 1-ton split-system HVAC unit maintains thermal comfort (18–26°C operational range) independent of ambient conditions, supporting extended shift durations.
• UV-C germicidal lamp (254 nm, 20 W) mounted internally for automated post-shift disinfection cycles; timer-controlled activation ensures operator safety interlock compliance.
• Stainless steel waste receptacle and pass-through chamber (400 × 400 × 400 mm) facilitate safe disposal and instrument exchange without breaching containment integrity.
• LED task lighting (≥300 lx average illuminance) meets IEC 60598-1 photometric requirements for clinical visual acuity tasks.

Sample Compatibility & Compliance

The FX-1S is not a sample analysis device but a biosafety work environment platform compatible with all standard nasopharyngeal/oropharyngeal swab collection kits (e.g., flocked nylon, polyester, or rayon-tipped swabs with viral transport media vials). Its engineering aligns with WHO interim guidance on safe sampling infrastructure (2022) and supports adherence to national biosafety protocols including China’s WS/T 688-2020 for nucleic acid testing sites. While not classified as medical electrical equipment under IEC 60601-1, its electrical architecture complies with GB 4706.1 (equivalent to IEC 60335-1) for household and similar electrical appliances. Structural integrity conforms to GB/T 19001-2016 (ISO 9001:2015) manufacturing quality management systems. The booth does not perform diagnostic functions and requires integration with accredited laboratory testing pipelines for downstream PCR or sequencing analysis.

Software & Data Management

The FX-1S operates as a standalone electromechanical system with no embedded firmware, cloud connectivity, or digital data logging capabilities. All controls—including power switching, UV lamp activation, HVAC mode selection, and lighting—are managed via tactile front-panel switches meeting IP54 ingress protection ratings. No software-based audit trail, user authentication, or electronic record generation is implemented. As such, it does not fall under regulatory scope of FDA 21 CFR Part 11 or EU Annex 11 for computerized system validation. Facilities requiring GLP/GMP-aligned documentation must implement external logbooks or LIMS-integrated workflow tracking for booth usage, disinfection cycles, and maintenance records.

Applications

• Community-level mass nucleic acid screening at transportation hubs, residential compounds, and municipal service centers.
• Frontline triage support in field hospitals or emergency response deployments where rapid PPE-free operator rotation is critical.
• Occupational health surveillance programs in industrial settings with high workforce density and airborne pathogen exposure risk.
• Academic and research institution field sampling operations requiring consistent environmental control across geographically dispersed collection points.
• Temporary vaccination or rapid antigen test administration stations requiring separation of operator and subject without full isolation room construction.

FAQ

Is the FX-1S certified as a Class II biological safety cabinet?
No. It is not a BSC and does not meet NSF/ANSI 49 performance criteria. It functions as a positive-pressure operator protection booth—not a product protection or cross-contamination control device.
Can the booth be used for aerosol-generating procedures beyond swab collection?
No. It is validated only for low-aerosol-risk swabbing. Procedures involving cough induction, sputum induction, or nebulizer use are contraindicated.
Does the unit include HEPA filter replacement monitoring or alarm functionality?
No. Filter service intervals must be determined by facility biomedical engineering staff based on local particulate load, runtime hours, and pressure drop measurements.
Is outdoor installation supported in extreme weather conditions?
Yes, within the specified operating envelope: −10°C to +40°C ambient temperature and 45–60% RH. Extended exposure to rain, snow, or direct solar loading exceeding 800 W/m² may degrade seal integrity and require supplemental weatherproofing.
What maintenance documentation is provided with the unit?
A bilingual (Chinese/English) technical manual covering dimensional drawings, electrical schematics, filter replacement procedures, UV lamp safety handling instructions, and preventive maintenance schedules is included.