FPI ETMS-100 Online VOC Monitoring System

Overview

The FPI ETMS-100 Online VOC Monitoring System is an industrial-grade, continuous emission monitoring solution engineered for real-time detection and quantification of volatile organic compounds (VOCs) in stack gas or process exhaust streams. It operates on the principle of photoionization detection (PID), wherein VOC molecules are ionized by high-energy ultraviolet (UV) photons—typically at 10.6 eV—and the resulting ion current is measured to determine concentration. This technique delivers rapid response (T₉₀ < 30 seconds), sub-part-per-trillion (ppt) detection limits for aromatic and aliphatic hydrocarbons, ketones, esters, and other photoionizable species. The system integrates a heated sampling probe, temperature-controlled sample line, multi-stage pre-treatment unit, and PID analyzer into a single coordinated architecture. Designed for unattended operation in harsh industrial environments, it meets functional requirements for regulatory compliance reporting, process optimization, and fugitive emission control under evolving environmental management frameworks.

Key Features

• Photoionization Detection (PID) core sensor with stable UV lamp output and low-drift electrometer circuitry for high reproducibility across extended run times
• Integrated pre-treatment subsystem featuring thermoelectric (Peltier) cooling-based condensate removal, eliminating reliance on chemical desiccants or mechanical chillers
• Self-monitoring pneumatic architecture with intelligent diaphragm pump control and real-time pressure differential sensing to detect and alert on filter clogging or line blockage
• Intrinsically safe or explosion-proof enclosure options (certified to IECEx/ATEX Zone 1 or Class I Div 1, depending on configuration) for deployment in hazardous areas
• Compact modular design (≤ 600 mm × 500 mm × 300 mm footprint) enabling wall-mount or skid-mounted installation with minimal civil works
• Embedded embedded Linux-based controller with 7-inch resistive touchscreen HMI, supporting bilingual (English/Chinese) interface and local data logging (≥ 30 days at 1-min intervals)

Sample Compatibility & Compliance

The ETMS-100 accommodates flue gas streams with operating temperatures up to 200 °C (probe-heated), particulate loading ≤ 100 mg/m³, and relative humidity ≤ 95% RH (post-dehumidification). It is validated for measurement of C₂–C₁₂ VOCs including benzene, toluene, xylene (BTX), styrene, acetone, MEK, and isopropanol. While not certified to EN 15267 or MCERTS as a standalone CEMS, the system is designed to support compliance with China’s HJ 1013–2018 standard for VOC online monitoring and aligns with technical prerequisites for EPA Method 25A and ISO 11890-2 applicability. Optional analog output (4–20 mA, isolated) and Modbus RTU/TCP interfaces facilitate integration into DCS/SCADA platforms and third-party data acquisition systems.

Software & Data Management

The onboard firmware provides configurable alarm thresholds (high/low, rate-of-change), automatic zero/span validation scheduling, and audit-trail-enabled event logging (including calibration actions, fault codes, and maintenance alerts). Raw sensor data, diagnostic parameters, and system status flags are timestamped and stored locally with SHA-256 hash integrity verification. Export options include CSV via USB host port or secure FTP push to remote servers. For enterprise-level deployment, optional FPI CloudConnect gateway enables TLS 1.2-encrypted telemetry transmission, role-based user access control, and remote firmware updates—supporting traceability requirements aligned with GLP and internal QA/QC protocols.

Applications

• Petrochemical refinery flare gas and storage tank breathing emissions monitoring
• VOC abatement system performance verification in semiconductor cleanroom exhaust ducts
• Real-time solvent concentration tracking in pharmaceutical coating and drying ovens
• Compliance-driven monitoring of printing press and automotive paint booth exhaust
• Leak detection and repair (LDAR) program support in rubber compounding and synthetic polymer production lines
• Process feedback control in catalytic oxidizer and activated carbon adsorption units

FAQ

What VOC compounds can the ETMS-100 reliably detect?
It detects photoionizable VOCs with ionization energies below 10.6 eV—including aromatics, olefins, aldehydes, ketones, and many chlorinated solvents—but does not respond to methane, ethane, CO, CO₂, or highly polar compounds like methanol or formic acid.
Is the system compliant with US EPA or EU regulatory standards?
The ETMS-100 is not EPA-certified as a reference method instrument; however, its measurement methodology satisfies the technical basis for Method 25A screening applications and supports EU Industrial Emissions Directive (IED) reporting when used alongside periodic reference audits.
Can the system operate continuously without manual intervention?
Yes—designed for 7×24 operation with automated diagnostics, self-compensating humidity correction, and scheduled zero/span checks; recommended preventive maintenance interval is every 90 days under typical industrial conditions.
Does the system support cybersecurity requirements for Industry 4.0 integration?
All network-connected variants implement TLS encryption, disabled default credentials, configurable firewall rules, and firmware signature verification to meet IEC 62443-3-3 SL2-aligned security practices.