Beifen Sanpu JF-2021B Intelligent Dual-Channel Constant-Flow Air Sampler

Overview

The Beifen Sanpu JF-2021B Intelligent Dual-Channel Constant-Flow Air Sampler is a precision-engineered environmental sampling instrument designed for quantitative collection of gaseous and vapor-phase pollutants—including SO₂, NOₓ, formaldehyde, benzene homologues, and other volatile compounds—from ambient air, indoor environments, and occupational workspaces. It operates on the principle of controlled volumetric aspiration using a calibrated electronic mass flow sensing system coupled with real-time microprocessor-based compensation for pressure, temperature, and power supply fluctuations. Unlike fixed-flow or mechanical rotameter-based samplers, the JF-2021B maintains constant volumetric flow across variable sampling resistances (e.g., impingers, sorbent tubes, filter media), ensuring metrological traceability to national standards and enabling accurate calculation of pollutant concentrations in µg/m³ or ppb under standard reference conditions (0 °C, 101.325 kPa). Its architecture complies with fundamental requirements for field-deployable air samplers defined in JJG 956–2013 (Verification Regulation for Air Samplers) and HJ/T 375–2007 (Technical Requirements and Test Methods for Ambient Air Samplers), making it suitable for regulatory monitoring, indoor air quality (IAQ) assessment per GB 50325–2020, and occupational hygiene surveys aligned with GB/T 17061–1997.

Key Features

• Dual independent sampling channels with fully decoupled flow control—enabling simultaneous parallel sampling, sequential multi-analyte collection, or differential sampling across distinct locations or media types.
• High-stability electronic thermal-mass flow sensors with automatic dynamic compensation for voltage drift, temperature gradients (−30 °C to +50 °C operating range), and variable backpressure up to 120 kPa.
• Imported corrosion-resistant diaphragm pump with integrated overcurrent protection, low acoustic emission (<55 dB(A)), and rated service life exceeding 5,000 hours under continuous high-load operation.
• Intelligent anti-freeze function: automatic heating of absorption bottles or inlet lines when ambient temperature falls below 0 °C—critical for winter field deployment in northern China and high-altitude regions.
• Non-volatile memory with brown-out recovery: all operational parameters (start time, set flow, elapsed duration, accumulated volume) are retained during unexpected power loss; sampling resumes automatically upon power restoration.
• Integrated environmental sensor suite: real-time measurement of pre-meter temperature (±0.5 °C) and pressure (±2.5 kPa), enabling on-board conversion of sampled volume to standard conditions (NTP or STP) per ISO 10780 and EPA Method TO-15 conventions.
• Optimized human-machine interface: auto-contrast monochrome LCD display with intuitive menu navigation, supporting bilingual prompts (English firmware optional), and compatible with cold, low-pressure, and high-humidity field environments.

Sample Compatibility & Compliance

The JF-2021B supports solution absorption (e.g., potassium tetrachloromercurate for SO₂, sodium hydroxide for NO₂), solid sorbent trapping (e.g., Tenax TA, Carbopack B, silica gel), and particulate filtration (PM₂.₅/PM₁₀) via interchangeable inlet modules. Its dual-channel design allows co-sampling of gaseous analytes and aerosols without cross-contamination. The instrument meets technical specifications outlined in HJ/T 375–2007 (including flow accuracy, stability, noise, and power consumption limits), JJG 956–2013 (verification protocols for calibration, linearity, and repeatability), and GB 50325–2020 Annex D for residential and commercial IAQ testing. While not certified to IEC 61000–4 electromagnetic immunity standards out-of-box, its internal shielding and filtered power input ensure stable performance in typical laboratory and field settings. Data logging integrity aligns with GLP principles—time-stamped records include operator ID, location tag, and environmental metadata required for audit-ready reporting.

Software & Data Management

Raw sampling data—including instantaneous flow rate, cumulative volume, pre-meter temperature/pressure, battery voltage, and runtime—are stored internally with 30-day retention capacity. USB 2.0 interface enables direct export of CSV-formatted datasets for post-processing in Excel, R, or specialized environmental software (e.g., EPA AERMOD preprocessor tools). Optional Bluetooth 4.2 module supports wireless printing of field logs to portable thermal printers (no proprietary drivers required). Firmware supports user-defined sampling schedules (start delay, interval triggers, multi-stage flow profiles), and all configuration changes are logged with timestamps—providing rudimentary 21 CFR Part 11–compatible audit trail functionality for QA/QC documentation. No cloud connectivity or remote monitoring is implemented; data sovereignty remains fully under end-user control.

Applications

• Ambient air quality monitoring networks (AQMN) for regulatory compliance with China’s Ambient Air Quality Standards (GB 3095–2012).
• Indoor air quality assessments in schools, hospitals, offices, and newly renovated buildings per GB 50325–2020.
• Occupational exposure evaluation in chemical plants, paint workshops, and semiconductor fabrication facilities per GBZ 159–2004.
• Emergency response deployments during industrial accidents or hazardous material spills requiring rapid, parallel gaseous contaminant characterization.
• Research-grade method validation studies involving inter-laboratory comparison of absorption efficiency or sorbent breakthrough behavior.
• Educational use in environmental engineering and analytical chemistry curricula for hands-on training in gravimetric and spectrophotometric analysis workflows.

FAQ

Does the JF-2021B support external flow calibration verification?
Yes—the device features a dedicated calibration port compatible with primary-standard dry calibrators (e.g., Gilian Gilibrator-2, Mesa Labs DryCal DC-Lite) and accepts manual correction factors entered via the keypad.
Can it operate continuously for more than 8 hours on battery power?
At nominal flow (1.0 L/min) and moderate backpressure (<60 kPa), runtime exceeds 10 hours on the 7.4 V / 10 Ah Li-ion pack; actual endurance depends on ambient temperature and pump load.
Is the internal clock synchronized with GPS or NTP?
No—time/date is set manually and maintained by an onboard RTC (real-time clock) with ±2 sec/month drift; users must log timestamp corrections if long-term unattended operation is required.
What maintenance intervals are recommended for the inlet filter and pump diaphragm?
The sintered stainless-steel dust filter should be cleaned weekly in high-particulate environments; the pump diaphragm requires replacement every 2,500–3,000 operational hours under typical usage conditions.
Are firmware updates available, and how are they installed?
Firmware revisions are distributed annually via secure download from Beifen Sanpu’s authorized support portal and installed via USB drive using the built-in bootloader mode—no third-party tools or vendor dispatch required.