HUANKONG JHK-1100 Personal Low-Flow Dust Sampler

Overview

The HUANKONG JHK-1100 Personal Low-Flow Dust Sampler is an engineered solution for compliant, field-deployable aerosol sampling in occupational health and environmental monitoring applications. Designed to meet the rigorous demands of individual worker exposure assessment, it operates on a constant-flow volumetric principle—utilizing closed-loop feedback control to maintain precise flow rates across variable sampling resistances (e.g., filter cassettes, sorbent tubes). Its core architecture integrates a high-stability diaphragm pump, real-time environmental sensor suite (temperature and barometric pressure), and microprocessor-driven flow regulation—ensuring metrological traceability to national standards including GBZ/T 192.1–2007 (total dust) and GBZ/T 192.2–2007 (respirable fraction). Unlike fixed-speed samplers, the JHK-1100 dynamically compensates for filter loading, battery voltage decay, and ambient pressure shifts—delivering reproducible volumetric intake essential for quantitative gravimetric or chemical analysis downstream.

Key Features

• Proprietary flow control algorithm with ≤±2% full-scale accuracy over 1–5 L/min range, validated per JJG/T 17061–1997 calibration protocol
• Compact, ergonomic form factor (≤280 g) optimized for belt-mounted personal sampling per ISO 7708:1995 respirable dust size-selective criteria
• Adjustable tripod mount compatible with standard 10-mm IOM inhalable samplers and 37-mm cassette holders
• Dual-power architecture: Integrated 7.4 V/2600 mAh Li-ion battery (≥6 h at 2 L/min) + universal AC input (100–240 VAC, 50/60 Hz)
• True constant-flow operation—flow rate remains invariant despite changes in backpressure up to 25 kPa, eliminating manual recalibration
• Ultra-low-noise (10,000 h MTBF under continuous duty cycle
• Wide-temperature LCD (–20°C to +60°C operational range) with backlight, supporting simultaneous display of real-time flow, accumulated volume, battery status, and ambient P/T
• Multi-mode sampling logic: programmable start delay, user-defined duration (1 min–24 h), or target volume termination (0.1–999.9 L)
• Non-volatile memory with auto-recovery: preserves sampling parameters and elapsed time during power interruption; resumes from breakpoint without data loss
• Onboard environmental compensation: calculates and logs standardized volume (Nm³ at 25°C, 101.325 kPa) using real-time T/P inputs per ISO 10780 and EPA Method 1

Sample Compatibility & Compliance

The JHK-1100 interfaces seamlessly with globally accepted collection media—including 37-mm PVC, mixed-cellulose ester (MCE), and polyvinyl chloride (PVC) filters for total dust; cyclone pre-separators (e.g., GK2.69, IOM) for respirable fraction isolation; and sorbent tubes (e.g., XAD-2, silica gel) for vapor-phase co-sampling. It satisfies functional requirements outlined in Chinese occupational hygiene regulations (GBZ series) and aligns with international methodological frameworks such as NIOSH Manual of Analytical Methods (NMAM) Chapter 2 and OSHA ID-130. While not CE-marked or FDA-listed, its mechanical and firmware design adheres to electromagnetic compatibility (EMC) principles per IEC 61326-1 and intrinsic safety considerations for non-hazardous area deployment. Documentation supports GLP-compliant audit trails when paired with external lab information management systems (LIMS).

Software & Data Management

Data export is supported via USB-C interface to Windows-based configuration utility (provided), enabling parameter setup, firmware updates, and CSV-formatted session log retrieval. Each sampling record includes timestamp, start/stop time, average flow rate, integrated volume, ambient temperature/pressure, and battery voltage history. The system stores ≥1000 sampling events internally with time-stamped metadata—sufficient for multi-week field campaigns without host PC dependency. All logged values are uneditable post-collection, satisfying basic ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate) for regulatory documentation. Optional Bluetooth module (JHK-BT1 add-on) enables wireless telemetry to mobile tablets running custom Android acquisition apps—facilitating real-time QA/QC checks in multi-point surveys.

Applications

• Personal exposure monitoring for respirable crystalline silica (RCS), beryllium, cobalt, and other metal dusts in foundries, battery manufacturing, and aerospace machining
• Workplace evaluation of organic vapors (e.g., acrylamide, TDI, MDI) using sorbent tube coupling per GBZ/T 160 series methods
• Baseline air quality screening in construction zones, demolition sites, and mineral processing facilities
• Validation of local exhaust ventilation (LEV) performance through upstream/downstream comparative sampling
• Field calibration support for optical particle counters (OPCs) and beta attenuation monitors (BAMs) requiring gravimetric reference
• Academic research on aerosol deposition efficiency and inhalation toxicology dose-response modeling

FAQ

What flow rate ranges does the JHK-1100 support, and how is stability maintained?

The instrument delivers calibrated flow between 1.0 and 5.0 L/min in 0.1-L/min increments. Stability is achieved via closed-loop PID control of pump speed, continuously referencing a thermal mass flow sensor (±0.5% reading accuracy) and compensating for resistance changes in real time.
Is the device suitable for respirable dust sampling per ISO/CEN standards?

Yes—when used with certified cyclones (e.g., GK2.69 or IOM) mounted at the inlet, it meets the flow tolerance and temporal stability requirements specified in EN 13205 and ISO 7708 for respirable fraction collection.
How is standard volume calculated, and which reference conditions are applied?

Standardized volume (Nm³) is computed using the ideal gas law with live inputs from onboard temperature and barometric pressure sensors. Default reference is 25°C and 101.325 kPa, but users may configure alternative standard conditions via software.
Does the JHK-1100 comply with FDA 21 CFR Part 11 for electronic records?

No—the device lacks electronic signature capability, audit trail encryption, or role-based access control required by Part 11. It is intended for use in environments where paper-based or LIMS-integrated verification suffices.
What maintenance is required for long-term reliability?

Annual calibration against a primary flow standard (e.g., dry calibrator or bubble meter) is recommended. Pump diaphragms and inlet filters should be inspected quarterly in high-dust environments; battery health degrades gradually after ~300 charge cycles.