AET Extension Tube for AmiD ASP Probes

Overview

The AET Extension Tube is a precision-engineered accessory designed exclusively for integration with AmiD ASP (Active Sampling Probe) systems used in continuous gas monitoring and emission compliance applications. It functions as a calibrated extension conduit that positions the ASP probe’s sampling inlet at the optimal point within a duct or stack—typically at the 1/3 cross-sectional depth from the wall—ensuring representative, isokinetic-capable sampling under varying flow profiles. Constructed from chemically inert, high-purity materials resistant to corrosion, condensation, and thermal degradation, the AET tube maintains sample integrity during transport from the sampling point to the analyzer. Its design adheres to fundamental principles of EPA Method 1 (for sampling location selection) and ISO 16911-1 (for velocity-based probe placement in ducts), supporting regulatory-grade data acquisition in industrial stack monitoring, CEMS (Continuous Emission Monitoring Systems), and ambient air quality networks.

Key Features

• Optimized geometric length and internal diameter to minimize pressure drop and residence time while preserving laminar flow characteristics upstream of the ASP probe inlet.
• Threaded stainless steel (316L) end fittings compatible with standard AmiD ASP probe mounting interfaces and DIN/ISO pneumatic coupling specifications.
• Thermal stability rated for continuous operation between −20 °C and +80 °C, suitable for both heated and unheated sampling configurations.
• Surface-finished interior (Ra ≤ 0.4 µm) to reduce adsorption losses of reactive gases (e.g., NH₃, HCl, SO₂) and prevent particulate buildup.
• Modular design enables field-adjustable lengths via standardized couplings—available in nominal increments of 300 mm, 500 mm, and 1000 mm—to accommodate diverse duct geometries and access constraints.

Sample Compatibility & Compliance

The AET Extension Tube is validated for use with AmiD ASP probes across a broad range of regulated and non-regulated gaseous analytes, including CO, NOₓ, SO₂, O₂, CH₄, VOCs (C₂–C₁₀), and acid gases. Its material composition complies with EN 15267-3 requirements for critical components in certified emission monitoring equipment. When deployed in conjunction with an AmiD-certified ASP system, the full assembly supports compliance with EU Directive 2010/75/EU (IED), US EPA Performance Specification 2 (PS-2) for SO₂/NOₓ analyzers, and ISO 14064-3 verification protocols. The tube itself carries CE marking per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD), and documentation includes traceable calibration certificates for dimensional conformity (ISO/IEC 17025 accredited laboratory).

Software & Data Management

While the AET Extension Tube is a passive mechanical component, its correct installation directly impacts data validity within AmiD’s integrated CEMS software suite (AmiD ControlCenter v5.x+). The software’s probe configuration module allows operators to input extension length, duct diameter, and average flue gas velocity—parameters used to auto-calculate recommended probe insertion depth and verify isokinetic sampling conditions. All configuration changes are logged with user ID, timestamp, and GPS-tagged site metadata (when enabled), fulfilling audit trail requirements under FDA 21 CFR Part 11 and EU Annex 11 for electronic records. Raw pressure differential and temperature gradient logs from optional embedded sensors (available upon request) are time-synchronized and exportable in CSV/ISA-88 compliant formats.

Applications

• Regulatory stack testing for power plants, cement kilns, and waste incinerators under EN 14181 QAL2/QAL3 protocols.
• Process gas monitoring in chemical and petrochemical refineries where spatial heterogeneity necessitates precise probe positioning.
• Calibration verification setups requiring reproducible sampling geometry across multiple reference methods (e.g., ASTM D6522, ISO 12039).
• Mobile emissions testing platforms where rapid probe repositioning and modular extension adaptability improve field deployment efficiency.
• Research-grade atmospheric chemistry studies involving multi-point vertical profiling in large-diameter exhaust stacks.

FAQ

Is the AET Extension Tube certified for use in EPA Method 3A or Method 6C applications?
Yes—when installed with an AmiD ASP probe meeting PS-1 and PS-2 certification criteria, the complete sampling train—including the AET tube—is accepted for compliance reporting under these methods, provided isokinetic sampling validation is performed per Section 8.2 of EPA Method 2.
Can the AET tube be used with non-AmiD probes?
It is dimensionally and mechanically optimized for AmiD ASP series probes only; interoperability with third-party probes is not supported or validated.
Does the AET tube require periodic recalibration or certification?
No—it is a passive component with no active electronics or metrological drift; however, visual inspection for corrosion, deformation, or seal integrity is recommended prior to each quarterly system audit.
What documentation accompanies each unit?
Each shipment includes a Declaration of Conformity, dimensional inspection report, material test certificate (EN 10204 3.1), and installation guidance aligned with ISO 16911-2 Annex B.