Genetec GH-6067 Asphalt Fume Sampling Probe

Overview

The Genetec GH-6067 Asphalt Fume Sampling Probe is a purpose-engineered, stack-integrated sampling device designed exclusively for the quantitative collection of asphalt fume emissions from industrial exhaust sources—primarily asphalt mixing plants, roofing material production lines, and bitumen processing facilities. It operates in strict accordance with the Chinese environmental monitoring standard HJ/T 45–1999, “Determination of Asphalt Fume in Stationary Source Exhaust—Gravimetric Method.” The probe enables isokinetic or near-isokinetic sampling by supporting integration with certified flue gas samplers (e.g., EPA Method 5–compatible systems), ensuring representative capture of both particulate-bound and semi-volatile organic fractions of asphalt fume. Its core function is to deliver conditioned, heated sample gas to a pre-weighed glass fiber filter cartridge housed in a temperature-controlled sampling head, minimizing condensation and adsorption loss during transit.

Key Features

• Galvanically isolated DC 12 V heating power supply—eliminates risk of electric shock in humid or conductive stack environments and ensures operational safety during field deployment.
• Full stainless steel construction of the sampling rod and probe housing—resists corrosion from acidic condensates, hydrocarbons, and elevated temperatures typical in asphalt process exhaust (up to 200 °C continuous duty).
• Integrated thermal management system—maintains probe tip and filter holder at ≥120 °C to prevent condensation of semi-volatile asphalt components (e.g., polycyclic aromatic hydrocarbons, heterocyclic compounds) prior to filtration.
• Modular interface compatible with standard 1.5-inch OD flue gas sampling manifolds and filter holders per HJ/T 45–1999 dimensional specifications.
• No internal electronics or sensors—designed as a passive, maintenance-free sampling interface to ensure long-term reliability and simplify calibration traceability.

Sample Compatibility & Compliance

The GH-6067 is validated for use with Class E glass fiber filters (e.g., Pallflex TX40HI20WW or equivalent), which are pre-conditioned, desiccated, and gravimetrically stabilized per HJ/T 45–1999 protocol. It supports sampling of complex, high-viscosity aerosols containing condensed bituminous tars, carbonaceous soot, and thermally labile organics without filter clogging or thermal degradation. While the probe itself does not perform real-time analysis, its geometry and thermal profile are optimized to meet isokinetic sampling criteria when paired with flow-controlled vacuum systems. Regulatory alignment includes full compatibility with China’s Ministry of Ecology and Environment (MEE) certification requirements for stationary source emission monitoring, and its mechanical design conforms to ISO 9096:2023 principles for particulate sampling in hot, wet flue gases.

Software & Data Management

As a hardware-only sampling component, the GH-6067 does not incorporate embedded firmware, onboard memory, or digital communication interfaces. All data acquisition, flow calibration, and gravimetric calculation workflows occur externally—within laboratory information management systems (LIMS) or EPA-compliant data loggers (e.g., Thermo Fisher FH62, Tisch Environmental TE-5170). Final concentration calculations follow HJ/T 45–1999 equations: C = (W₂ − W₁) × 10⁶ / V_nd, where C is asphalt fume concentration (mg/m³), W₁ and W₂ are pre- and post-sampling filter masses (g), and V_nd is the normalized dry gas volume (m³) corrected to 273.15 K and 101.325 kPa. Audit trails, weight logs, and environmental condition records must be retained per GLP requirements for regulatory reporting.

Applications

• Regulatory compliance monitoring at asphalt concrete batch plants under MEE Tier II emission permits.
• Source testing for environmental impact assessments (EIAs) of new bitumen refining or modified asphalt production lines.
• Method validation studies comparing gravimetric results against real-time optical absorption (e.g., UV-Vis) or GC-MS speciation data.
• Stack testing during commissioning of electrostatic precipitators (ESPs) or wet scrubbers treating asphalt fume-laden exhaust.
• Field intercomparison campaigns between accredited laboratories performing HJ/T 45–1999–based measurements.

FAQ

Does the GH-6067 include an integrated flow meter or controller?
No. It is a passive sampling probe and requires external flow regulation via a calibrated vacuum pump and critical orifice or mass flow controller.
What is the maximum allowable stack gas temperature during operation?
The probe is rated for continuous exposure up to 200 °C; however, filter cartridge temperature must remain ≥120 °C and ≤180 °C to avoid thermal decomposition of asphalt analytes.
Is the probe compatible with US EPA Method 5 or ISO 9096?
While not certified to those standards, its mechanical dimensions, isokinetic nozzle options, and thermal performance align with the physical sampling principles outlined in both methods.
Can it be used for other tarry emissions beyond asphalt fume?
Yes—its design is applicable to coal tar pitch, creosote, and heavy fuel oil combustion aerosols, provided sampling conditions and filter selection are adjusted per relevant method protocols.
What documentation accompanies each unit for quality assurance?
Each GH-6067 is supplied with a manufacturer’s certificate of conformance, material test reports (MTRs) for stainless steel grade (316L), and dimensional verification against HJ/T 45–1999 Annex A specifications.