Zhicheng ZHJH-C1112C Intelligent Safety Clean Bench with HEPA Failure Alarm

Overview

The Zhicheng ZHJH-C1112C Intelligent Safety Clean Bench is an ISO 14644-1 Class 5 (equivalent to FS209E Class 100) vertical laminar flow workstation engineered for consistent personnel protection, product integrity, and process reliability in non-sterile but contamination-sensitive applications. It operates on the principle of unidirectional, HEPA-filtered vertical airflow—air is drawn through a pre-filter, pressurized by a high-static-pressure centrifugal fan, conditioned through a certified H14-grade HEPA filter (≥99.995% efficiency at 0.3 µm), and delivered as uniform, low-turbulence downflow across the entire work surface. Unlike conventional clean benches lacking real-time filter health monitoring, the ZHJH-C1112C integrates continuous differential pressure sensing, dynamic airflow calibration, and multi-modal HEPA integrity diagnostics—enabling proactive maintenance scheduling and eliminating undetected filter degradation that could compromise microbial containment or particle control.

Key Features

• Real-time HEPA health monitoring: Continuous differential pressure measurement (0–500 Pa range, ±1% accuracy) with automatic alarm triggers for filter clogging, rupture, or performance decay
• Stepless air velocity control (0.1–1.0 m/s) with closed-loop feedback; operational range maintained at 0.3–0.6 m/s with ±0.05 m/s stability and 0.1 m/s display resolution
• Intuitive 5.7-inch LCD touchscreen interface with full Chinese localization, displaying live metrics: airflow velocity, HEPA ΔP, cumulative runtime, UV lamp status, and system fault codes
• Programmable UV sterilization cycle: User-defined start/stop times, automatic activation post-operation, and integrated safety interlock preventing UV exposure during sash operation
• Ergonomic dual-pane tempered glass viewport (side and front) with self-balancing vertical sash—positionable at any height without drift or vibration
• Electropolished 304 stainless steel work surface with seamless radiused corners (R ≥10 mm) for ISO-compliant cleaning validation and residue-free decontamination
• Low-noise acoustic design: ≤62 dB(A) at 1 m, achieved via optimized fan housing, vibration-damped mounting, and aerodynamic duct geometry
• Comprehensive audit-ready logging: Timestamped records of UV cycles, fan runtime, alarm events, and parameter changes stored locally for GLP/GMP traceability

Sample Compatibility & Compliance

The ZHJH-C1112C is validated for use with non-hazardous biological samples, pharmaceutical intermediates, environmental swabs, microelectronics components, and diagnostic reagents where ambient particulate control—not pathogen containment—is required. It complies with ISO 14644-1:2015 (Class 5), ISO 14644-3:2019 (testing methodologies), and JIS B 9920:2019 for clean bench performance verification. While not rated for biosafety level 2 (BSL-2) agents per NSF/ANSI 49, its HEPA failure detection architecture aligns with FDA 21 CFR Part 11 data integrity expectations when used in quality-controlled environments supporting USP or EU GMP Annex 1 ancillary operations. The unit meets CE electromagnetic compatibility (EMC) Directive 2014/30/EU and Low Voltage Directive 2014/35/EU requirements.

Software & Data Management

No external software installation is required—the embedded firmware provides native functionality for all operational and diagnostic tasks. All system parameters are logged with ISO 8601 timestamps and retained for ≥12 months in non-volatile memory. Event logs include HEPA pressure deviation alerts, UV cycle completion confirmations, sash position anomalies, and power interruption records. Export is supported via USB port (FAT32-formatted drive) in CSV format for integration into LIMS or electronic lab notebooks. Audit trail features satisfy ALCOA+ principles: attributable, legible, contemporaneous, original, accurate, complete, consistent, enduring, and available—supporting regulatory inspections under FDA, EMA, or NMPA frameworks.

Applications

• Cell culture setup and passaging in academic and contract research laboratories
• Preparation of sterile media, buffers, and diluents for QC testing in pharmaceutical manufacturing
• Handling of sensitive optical or MEMS components in cleanroom-adjacent assembly zones
• Environmental sampling kit preparation for ISO 14644-2 compliance monitoring
• Non-invasive instrumentation calibration requiring particulate-free ambient conditions
• Teaching laboratories requiring robust, serviceable infrastructure with transparent operational feedback

FAQ

Does this clean bench provide personnel protection against biohazards?
No. The ZHJH-C1112C is a Class I clean bench equivalent—designed for product protection only. It does not recirculate air nor provide inward face velocity; therefore, it is unsuitable for handling infectious agents or toxic compounds.
Can the HEPA filter be replaced in-house without recalibration?
Yes. The unit includes a standardized H14 filter cartridge with quick-release clamping. Post-replacement, the system performs automatic zero-point pressure offset adjustment—no external tools or service technician required.
Is the UV lamp intensity monitored over time?
The firmware tracks cumulative UV exposure hours and cross-references lamp age against manufacturer-specified output decay curves. When irradiance falls below 70% of initial specification, a maintenance alert is triggered.
What electrical safety certifications does the unit hold?
It conforms to IEC 61010-1:2010 for laboratory equipment safety, including dielectric strength, creepage/clearance, and protective earth continuity testing.
Can the unit operate continuously for 24/7 applications?
Yes. Rated for uninterrupted duty cycle under ambient temperatures of 15–30°C and relative humidity ≤70% non-condensing. Thermal management includes redundant fan monitoring and overtemperature cutoff.