GQC-1 Personal Air Sampling Pump

Overview

The GQC-1 Personal Air Sampling Pump is an engineered solution for compliant, low-flow, time-weighted average (TWA) air sampling in occupational hygiene monitoring. Designed specifically to meet the operational requirements of China’s Workplace Air Toxic Substance Determination (GBZ/T 160 series), this portable pump implements a fixed-flow mechanical regulation architecture—eliminating reliance on electronic flow meters or feedback-controlled circuits. Instead, it employs a precision-engineered flow restrictor card (flow lock card) that maintains stable aspiration across extended sampling durations under variable backpressure conditions. Its core measurement principle is volumetric displacement via a diaphragm-based vacuum pump, optimized for sustained operation at low flow rates (20–300 mL/min) while sustaining >5000 Pa negative pressure capability. This architecture ensures consistent sample integrity in personal exposure assessments where reproducibility and regulatory traceability are critical—particularly for collection of vapors, gases, and aerosols onto sorbent tubes or filter media.

Key Features

• Fixed-flow mechanical regulation using a calibrated flow lock card—no external flow meter required; flow stability maintained at ≤5% deviation over full sampling duration
• High-efficiency, low-noise diaphragm pump engineered for continuous low-flow operation with ≥5000 Pa maximum vacuum capacity
• 4-digit LED timer display with programmable range from 0 to 23 hours 59 minutes; timing accuracy better than ±0.1% under standard operating conditions
• Integrated particulate pre-filter to protect internal pump components from dust and moisture ingress
• Battery voltage monitoring circuit with visual LED indicator and audible buzzer alert upon under-voltage condition
• Ergonomic waist-mounted design with integrated belt clip for hands-free, unobtrusive personal sampling
• Acoustic emission limited to <60 dB(A) during continuous operation—suitable for use in quiet laboratory or office environments
• Compact form factor (120 × 80 × 42 mm) and lightweight construction (380 g including rechargeable battery)

Sample Compatibility & Compliance

The GQC-1 supports standard 37-mm and 25-mm filter cassettes, as well as common sorbent tubes (e.g., activated charcoal, silica gel, Tenax) used in accordance with GBZ/T 160, ISO 16000-6, and OSHA Method 0500/0501 protocols. Its fixed-flow design aligns with ISO 13137:2013 requirements for personal sampling pumps, particularly regarding flow consistency under loading and temperature variation. While not intrinsically safe certified itself, its mechanical simplicity and absence of spark-generating electronics contribute to inherent reliability in non-hazardous area applications. For hazardous locations, the sister model GQC-2 (Ex ia IICT4 certified) is available.

Software & Data Management

The GQC-1 operates as a standalone hardware device without embedded Bluetooth, USB, or wireless connectivity. All operational parameters—including start time, duration, and battery status—are monitored locally via the front-panel display. No proprietary software is required; however, field data logs (start/stop times, pump runtime, battery voltage history) may be manually recorded and integrated into broader occupational hygiene databases compliant with ISO 45001 or ANSI Z184.1 audit frameworks. The timer’s high-precision quartz oscillator enables synchronization with laboratory clock systems for GLP-aligned chain-of-custody documentation.

Applications

• Personal exposure monitoring for volatile organic compounds (VOCs), aldehydes, metals, and acid gases in industrial hygiene surveys
• Compliance sampling per GBZ/T 160 series standards in chemical manufacturing, pharmaceutical production, and coating application facilities
• Baseline ambient air quality assessment in confined workspaces such as laboratories, cleanrooms, and maintenance enclosures
• Long-duration TWA sampling campaigns requiring eight or more hours of uninterrupted operation
• Field calibration verification of passive badge systems through parallel active sampling

FAQ

What is the maximum allowable backpressure for accurate flow performance?
The GQC-1 maintains flow error within ±5% up to 5000 Pa negative pressure—validated across the full 20–300 mL/min range.
Does the pump include rechargeable battery management circuitry?
Yes—integrated charge control and low-voltage detection ensure safe battery cycling and prevent deep discharge damage.
Can the flow lock card be recalibrated or replaced in the field?
Flow lock cards are factory-calibrated and not user-replaceable; replacement requires return-to-factory service and revalidation against NIST-traceable flow standards.
Is the device compatible with international sampling standards such as NIOSH or ISO methods?
While designed to meet GBZ/T 160, its flow stability, timer accuracy, and physical interface conform to the functional requirements of ISO 13137 and NIOSH Manual of Analytical Methods (NMAM) Chapter 2.