Bettersize BTPM-HS10 Multi-Filter Standard Ambient Air PM2.5 and PM10 Sampler (10-Position Carousel)

Overview

The Bettersize BTPM-HS10 is a high-reliability, multi-filter sequential ambient air particulate matter sampler engineered for regulatory-grade PM_2.5 and PM₁₀ monitoring under field-deployed conditions. It operates on the gravimetric principle defined in HJ 618–2011 and HJ 656–2013, drawing ambient air through standardized 47 mm diameter filters at a precisely controlled volumetric flow rate of 16.67 L/min (equivalent to 1 m³/h), enabling quantitative mass concentration determination via post-sampling laboratory weighing. Its core architecture integrates a Thomas diaphragm vacuum pump with ≥60 kPa pressure capability and a certified mass flow controller (MFC) to maintain flow stability within <1% RSD—even under variable filter loading and ambient backpressure up to 35 kPa—ensuring metrological traceability across extended deployments. Designed for unattended operation in harsh environments (−30 to +50 °C, 0–100% RH), the BTPM-HS10 meets the mechanical, electrical, and performance requirements specified in HJ 93–2013 for reference and equivalent samplers used in national air quality monitoring networks.

Key Features

• 10-position automated filter carousel: accommodates ten 47 mm filters (glass fiber, quartz, PTFE, or polyvinyl chloride) without manual intervention; each filter programmable for independent sampling duration from 1 to 99 hours.
• High-stability flow control: dual-stage regulation using a calibrated thermal mass flow controller and dynamic pump compensation ensures ±1% maximum flow error and <1% short-term stability over full operational life (6000 h at rated load).
• Integrated environmental sensing: co-located high-accuracy temperature, relative humidity, and static pressure sensors monitor both inlet and internal chamber conditions for real-time correction of volumetric flow to standard temperature and pressure (STP).
• Sealed filter storage: all active and standby filters remain housed within a hermetically sealed, contamination-isolated carousel compartment—preventing cross-sample exposure, moisture ingress, or particulate re-entrainment during idle cycles.
• Field-hardened enclosure: IP55-rated housing with integrated rain hood and dust shield enables continuous outdoor deployment; acoustic noise ≤53 dB(A) permits installation near residential or sensitive monitoring sites.
• Intuitive human-machine interface: 7-inch capacitive touchscreen supports multilingual menu navigation, real-time status visualization, and on-device configuration of sampling sequences, alarm thresholds, and calibration parameters.

Sample Compatibility & Compliance

The BTPM-HS10 accepts any commercially available 47 mm circular filter medium compliant with ISO 9001-manufactured specifications—including quartz fiber (for OC/EC analysis), Teflon® (for ion chromatography), glass fiber (for gravimetric mass determination), and nylon (for metal speciation). It is fully compatible with standardized inlet configurations: PM_2.5 (WINS impactor), PM₁₀ (size-selective cyclone), TSP, and optional PM₁ heads—enabling method-flexible deployment across multiple regulatory programs. The instrument satisfies mandatory technical criteria outlined in HJ 93–2013 (including flow accuracy, temporal resolution, data logging integrity, and leak-tightness verification), and supports audit-ready documentation required under China’s Environmental Air Quality Monitoring Specification (Trial). Optional low-temperature module (-10 °C condensation trap) minimizes semi-volatile organic compound (SVOC) loss during cold-season sampling—aligning with best practices in aerosol chemical speciation studies.

Software & Data Management

All operational metadata—including timestamped flow rates, temperature/pressure/humidity readings, pump duty cycle, filter position index, and system diagnostics—are logged at 1-minute intervals to an internal 4 GB industrial-grade SD card. Data retention exceeds 10 years under default logging settings. Files export via USB 2.0 port in CSV and XML formats compatible with EPA AirData, R software, and custom LIMS pipelines. Firmware supports remote firmware updates and diagnostic telemetry via RS-232 or optional Ethernet/WiFi module. Audit trail functionality records all parameter changes with user ID, timestamp, and pre-/post-value—meeting GLP-aligned data integrity expectations for regulatory submissions.

Applications

• Ambient air quality monitoring networks: deployed as reference or collocated equivalent samplers for QA/QC validation against continuous analyzers (e.g., beta attenuation monitors) in national and provincial stations.
• Pollution source characterization: time-resolved filter sets support receptor modeling (e.g., PMF, CMB) for source apportionment of urban, industrial, and biomass-burning emissions.
• Toxicological and epidemiological research: collection of size-fractionated aerosols for in vitro cytotoxicity assays, oxidative potential measurement, and elemental/molecular speciation (ICP-MS, GC-MS, IC).
• Meteorological interaction studies: correlation of PM mass concentrations with visibility, boundary layer height, and synoptic weather patterns to quantify aerosol–radiation–cloud feedbacks.
• Indoor air quality assessment: adapted for occupational hygiene surveys in manufacturing, construction, and mining environments where respirable dust exposure must be quantified per GBZ 159–2004.

FAQ

Does the BTPM-HS10 comply with U.S. EPA or EU EN standards for reference samplers?
It is designed and validated per Chinese national standards (HJ 93–2013, HJ 656–2013); while not formally certified to EPA EQPM or EN 12341, its flow control performance, dimensional compatibility, and gravimetric methodology are technically aligned with ISO 25239 and EN 12341:2014 principles.
Can the instrument operate continuously for 30 days without maintenance?
Yes—its 6000-hour rated pump lifetime and sealed carousel design enable uninterrupted 30-day campaigns when configured with 10 filters and 72-h sampling intervals per filter.
Is remote monitoring supported out of the box?
Standard configuration includes RS-232 serial interface; optional Ethernet or 4G LTE module enables SCADA integration, cloud-based data forwarding, and remote parameter adjustment.
What filter media are validated for use with this sampler?
Bettersize provides application notes for quartz (Pallflex QMA), Teflon (SKC PVC-coated), and glass fiber (Whatman GF/F); users may qualify additional substrates per HJ 656–2013 Section 5.2.3.
How is flow calibration traceability maintained?
Each unit ships with NIST-traceable calibration certificate for the MFC; field recalibration is performed using a primary-standard dry calibrator (e.g., Brooks 5850E) following HJ 93–2013 Annex D procedures.