QC-1S Single-Channel Ambient Air Sampler

Overview

The QC-1S Single-Channel Ambient Air Sampler is a compact, portable, and field-deployable sampling instrument engineered for time-integrated collection of airborne contaminants—including particulate matter (PM₁₀, PM_2.5), volatile organic compounds (VOCs), inorganic gases (e.g., SO₂, NO_x, O₃), and aerosol-bound metals—under ambient environmental conditions. It operates on the principle of constant-flow volumetric sampling, utilizing a brushless DC diaphragm pump coupled with a precision mechanical flowmeter and microcontroller-based timing circuitry. Designed for compliance with standardized methods such as EPA Method TO-15, ISO 16000-6, and HJ/T 375–2007 (China), the QC-1S delivers stable, traceable airflow across variable filter media and sorbent tube configurations, enabling gravimetric, chromatographic, and spectroscopic downstream analysis.

Key Features

• Compact form factor (100 × 150 × 52 mm) and lightweight design (550 g with integrated rechargeable Li-ion battery) optimized for handheld operation and extended field deployment.
• Calibrated single-channel flow control system with adjustable range from 0.1 to 1.5 L/min, meeting ISO 5800:2021 requirements for low-flow air samplers used in occupational and ambient monitoring.
• High-efficiency brushless diaphragm pump capable of sustaining ≥1.0 L/min against a static backpressure of 4 kPa—ensuring reliable performance with standard 37-mm quartz fiber filters, PTFE membranes, or multi-bed sorbent tubes (e.g., Tenax TA/Carbograph).
• Digital LCD timer with real-time elapsed time display and programmable sampling duration (up to 99 hours, 59 minutes); timing accuracy better than ±0.1% over full operating temperature range (−10 to +45 °C).
• Flowmeter certified to Class 2.5 per ISO 4008 and GB/T 28210–2011, providing traceable calibration against primary standards; flow stability maintained within ±5% under varying ambient pressure and temperature gradients.
• Ruggedized housing with IP54-rated ingress protection, reinforced ABS casing, and low-power electronics architecture supporting continuous operation for 6+ hours at nominal flow (1.0 L/min) and up to 8 hours at reduced flow (0.3 L/min).

Sample Compatibility & Compliance

The QC-1S accommodates standard 37-mm and 47-mm filter cassettes (e.g., PVC, Teflon®, quartz, and mixed-cellulose ester), as well as 60–120 mm sorbent tubes (e.g., activated charcoal, silica gel, and carbon molecular sieve). Its flow profile and pressure response are validated for use with gravimetric PM determinations per ISO 7708 and EN 12341, as well as thermal desorption GC-MS analysis per ASTM D6196. The instrument meets essential electrical safety and electromagnetic compatibility criteria per IEC 61000-6-3 and IEC 61000-6-2. While not intrinsically safe, it is suitable for non-hazardous area deployment in accordance with IEC 60079-0 general requirements.

Software & Data Management

The QC-1S operates as a standalone hardware platform without embedded Bluetooth or USB data logging. However, its precise timing and calibrated flow enable full traceability when paired with external laboratory information management systems (LIMS). Field records—including start/stop timestamps, nominal flow setting, filter lot number, sampler ID, and site metadata—are manually entered into compliant reporting templates aligned with ISO/IEC 17025 documentation practices. Optional PC-based configuration utilities (supplied on secure USB drive) support firmware updates and factory recalibration verification logs, retaining audit trails required for GLP and EPA-compliant environmental monitoring programs.

Applications

• Ambient air quality monitoring networks (AQMN) for regulatory compliance with national ambient air quality standards (NAAQS, China’s GB 3095–2012).
• Indoor air quality (IAQ) assessments in schools, offices, and healthcare facilities per ISO 16000 series protocols.
• Workplace exposure monitoring for respirable dust, metal fumes, and solvent vapors in accordance with OSHA Z-1 and GBZ 159–2004.
• Source apportionment studies requiring synchronized, multi-location low-flow sampling for receptor modeling (e.g., PMF, CMB).
• Method validation and inter-laboratory comparison exercises where instrument portability, reproducibility, and metrological traceability are critical.

FAQ

Is the QC-1S certified for use in EPA-compliant monitoring programs?

Yes—when operated within specified flow and backpressure limits and used with NIOSH- or ISO-certified sampling media, the QC-1S satisfies method requirements for passive and active sampling in EPA Compendium Methods TO-1, TO-2, and TO-15.
Can the flow rate be calibrated in-house using a primary standard?

Yes—the built-in mechanical flowmeter allows field verification using a bubble flowmeter or electronic calibrator traceable to NIST or CNAS standards; calibration certificates and adjustment procedures are provided in the technical manual.
Does the device support multi-hour unattended operation?

Yes—configured at 0.5 L/min with a fully charged battery, the QC-1S achieves ≥8 hours of continuous sampling; optional external power adapters (12 V DC) enable indefinite operation in fixed-site applications.
What maintenance intervals are recommended for long-term reliability?

Pump diaphragm and inlet filter should be inspected every 500 operational hours; full preventive maintenance—including flowmeter recalibration and battery health assessment—is advised annually or after 10,000 sampling cycles.
Is firmware upgrade capability available?

Yes—firmware updates are distributed via encrypted USB utility and require authorized service center access; all versions comply with IEC 62304 software lifecycle requirements for medical and environmental instrumentation.