Zhicheng ZHJH-C1115C Intelligent Safety Clean Bench with HEPA Failure Alert

Overview

The Zhicheng ZHJH-C1115C Intelligent Safety Clean Bench is a vertically downflow laminar flow workstation engineered for high-reliability biosafety and process integrity in critical laboratory environments. It operates on the principle of unidirectional airflow generated by a low-noise, high-static-pressure centrifugal blower, directing HEPA-filtered air (ISO 14644-1 Class 5 / FS209E Class 100) downward across the work surface at a precisely regulated velocity between 0.3 and 0.6 m/s. Unlike conventional clean benches lacking real-time filter health monitoring, the ZHJH-C1115C integrates continuous differential pressure sensing, dynamic airflow calibration, and multi-stage HEPA integrity diagnostics—including rupture detection, end-of-life prediction, and failure alerting—to prevent undetected particulate or microbial ingress. Designed and validated under China’s Ministry of Science and Technology SME Innovation Fund (2005), this unit meets foundational requirements for GLP-compliant sample handling and supports workflows aligned with ISO 13485, USP , and WHO TRS 961 Annex 2 for aseptic processing environments.

Key Features

• Real-time HEPA filter health monitoring via integrated differential pressure transducer (0–500 Pa range, ±1% FS accuracy), with automated visual, audible, and on-screen alerts for impending or actual filter degradation
• Digital stepless air velocity control (0.1–1.0 m/s range) with closed-loop feedback ensuring operational stability within ±0.05 m/s tolerance
• Backlit 4.3-inch LCD interface displaying simultaneous readouts of actual air velocity, HEPA ΔP, cumulative runtime, UV lamp status, and system mode—presented in English-language UI with intuitive touch-sensitive navigation
• Programmable dual-timer system enabling independent scheduling of fan operation and 254 nm quartz UV germicidal irradiation, minimizing manual intervention and maximizing daily throughput
• Structural design optimized for contamination control: seamless stainless steel work surface with radiused internal corners, dual side-view tempered glass panels (enhanced field of view and light transmission), and self-balancing vertical sliding sash with friction-lock positioning
• Acoustically damped enclosure housing a high-efficiency centrifugal fan delivering stable airflow at ≤62 dB(A), complemented by vibration isolation yielding ≤4 µm half-peak displacement
• Comprehensive data logging capability supporting audit-ready records including start/stop timestamps, UV exposure cycles, and HEPA pressure trend history

Sample Compatibility & Compliance

The ZHJH-C1115C accommodates standard microbiological, cell culture, and pharmaceutical preparation protocols requiring Class 100 laminar airflow. Its single-opening vertical configuration (1500 mm work width) provides unobstructed access while maintaining consistent velocity uniformity across the full working plane (≥300 lx illumination ensures visual clarity during extended manipulations). The system complies with core international performance benchmarks: particle concentration ≤3.5 particles per liter for ≥0.5 µm (per ISO 14644-1:2015), microbial recovery ≤0.5 CFU per 90 mm settle plate (validated per ISO 14698-1), and electrical safety conforming to IEC 61010-1. While not certified as a biological safety cabinet (BSC), its engineering aligns with risk-mitigated open-front containment practices recommended in CLSI M29-A4 and EU GMP Annex 1 for non-hazardous sterile operations.

Software & Data Management

The embedded microcontroller firmware supports traceable operation through timestamped event logging—including HEPA alarm triggers, UV activation cycles, fan runtime accumulation, and user-mode transitions. All parameters are retained in non-volatile memory and accessible via the front-panel interface without external software. Though no PC connectivity or remote API is provided, the system’s internal audit trail satisfies basic GLP documentation requirements for equipment usage verification. Optional factory calibration certificates (traceable to NIM, China) may be supplied upon request, covering air velocity uniformity mapping and UV intensity validation at 1 m distance. Firmware updates are performed locally via secure USB interface under authorized service protocols.

Applications

• Aseptic transfer of mammalian and microbial cultures in academic and industrial biotechnology labs
• Preparation of media, reagents, and sterile dilutions in QC/QA laboratories serving pharmaceutical and nutraceutical manufacturing
• Handling of sensitive diagnostic specimens in clinical microbiology and public health testing facilities
• Assembly and inspection of precision optical and electronic components where electrostatic discharge (ESD)-safe laminar flow is required
• Environmental monitoring sample processing—including air and water filtration media handling—under controlled particulate conditions

FAQ

Does the ZHJH-C1115C meet ISO Class 5 (Class 100) certification standards?
Yes—the unit maintains ≤3.5 particles/L ≥0.5 µm in the work area under steady-state operation, verified per ISO 14644-1:2015 test methodology.
Can HEPA filter replacement be performed onsite without specialized tools?
Yes—modular filter housing allows removal and replacement using standard hex-key hardware; full procedure documented in the English-language service manual.
Is the UV lamp intensity monitored or calibrated during operation?
No real-time UV intensity measurement is included; however, lamp runtime is tracked, and replacement intervals follow manufacturer-specified duty cycles (typically 1000–1500 hours) aligned with IEC 62471 photobiological safety guidelines.
What regulatory documentation accompanies the unit for installation qualification (IQ)?
Factory test reports include airflow uniformity maps, noise/vibration measurements, and electrical safety verification; additional IQ/OQ documentation packages are available upon request.
Is the control system compliant with FDA 21 CFR Part 11 requirements?
No—the system lacks electronic signature capability, audit trail export, or role-based access control; it is intended for non-GxP-critical applications unless augmented by institutional procedural controls.