FPI ETMS-100 Online TVOC Monitoring System for Industrial Stack Emissions
| Brand | FPI (Focus Photonics Inc.) |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | OEM Manufacturer |
| Country of Origin | China |
| Model | ETMS-100 |
| Pricing | Available Upon Request |
Overview
The FPI ETMS-100 Online TVOC Monitoring System is an industrial-grade, in-situ continuous emission monitoring system (CEMS) engineered for real-time quantification of total volatile organic compounds (TVOCs) in flue gas streams from combustion sources, chemical processing units, and refinery off-gas ducts. It operates on the principle of photoionization detection (PID), utilizing a high-stability 10.6 eV ultraviolet (UV) lamp to ionize VOC molecules—excluding methane, ethane, and propane—whose ionization energies fall below the photon energy threshold. This selective ionization enables broad-spectrum detection across hundreds of industrially relevant compounds including aldehydes, alcohols, halogenated alkenes, aromatic hydrocarbons, and saturated/unsaturated aliphatics. Designed specifically for harsh stack environments, the ETMS-100 integrates high-temperature sampling (up to 200 °C), multi-stage particulate filtration, and deep-cooling condensate removal to mitigate interference from water vapor, aerosols, and sticky organics—common failure modes in conventional PID-based CEMS. Its robust architecture eliminates the need for carrier gas, consumable sensors, or frequent calibration drift correction, supporting unattended operation over extended intervals.
Key Features
- Compliant with JJF 1172–2007 “Calibration Specification for Total Volatile Organic Compounds Analyzers” — enabling traceable metrological validation in Chinese regulatory contexts.
- Full-line heated sampling path (up to 200 °C) prevents adsorption losses of low-volatility and polar VOCs (e.g., formaldehyde, acetaldehyde, methanol) on tubing walls.
- Integrated thermoelectric cooling module achieves dew point ≤ −10 °C, followed by coalescing and sintered metal filters to remove >99.9% of liquid water and sub-micron particulates.
- Automated pneumatic back-purge cycle cleans optical windows and flow paths at scheduled intervals, maintaining UV lamp transmittance and detector sensitivity.
- Intrinsically safe explosion-proof housing (Ex d IIB T4 Gb / Ex tb IIIC T135°C Db) certified for direct installation at Class I, Division 1 hazardous locations without remote sheltering.
- Response time (T90) ≤ 30 seconds under standard stack conditions (flow rate 0.8–1.2 L/min, temperature 120–180 °C), meeting real-time process control requirements.
Sample Compatibility & Compliance
The ETMS-100 is validated for use with flue gases containing up to 20 vol% O2, ≤ 1000 mg/m³ total suspended particulates (TSP), and moisture content ≤ 15 vol% (post-condensation). It maintains measurement stability in presence of SO2 (≤ 500 ppm), NOx (≤ 200 ppm), and CO (≤ 1% v/v), provided acid gases are not condensed upstream of the analyzer inlet. While not certified to EN 15267 or EPA Method 25A, its design aligns with functional equivalency requirements for TVOC CEMS under China’s HJ 1013–2018 and HJ 75–2017 standards. Data integrity meets GLP-compliant audit trail requirements via embedded timestamped event logging and configuration change history.
Software & Data Management
The embedded Linux-based firmware supports dual-mode communication: analog output (4–20 mA isolated current loop), digital serial interface (RS485 Modbus RTU), and optional integrated GPRS/4G LTE modem for cloud telemetry. All data packets include CRC-16 checksums and support TLS 1.2 encryption when transmitted to central SCADA or environmental information platforms. The local web interface (HTTPS-enabled) provides real-time chromatogram-free concentration trends, diagnostic status (lamp intensity, filter pressure drop, condenser temperature), and automated calibration log export (CSV/Excel). Firmware updates are performed via secure SFTP or USB mass storage, with rollback capability and SHA-256 signature verification.
Applications
- Continuous compliance monitoring of TVOC emissions from petrochemical crackers, reformers, and flare stacks.
- Leak detection and repair (LDAR) program support in refineries and fine chemical plants using fixed-point fence-line monitoring.
- Process optimization feedback for solvent recovery units, thermal oxidizers (TOs), and regenerative thermal oxidizers (RTOs).
- Stack testing support during MACT (Maximum Achievable Control Technology) or local environmental inspections per provincial ecological departments.
- Integration into enterprise-level environmental management information systems (EMIS) for cross-site VOC inventory reporting and carbon intensity benchmarking.
FAQ
Does the ETMS-100 require zero/span calibration gas cylinders?
No. It uses electronic zero referencing and factory-characterized response factors; periodic verification with certified standard gas (e.g., isobutylene in nitrogen) is recommended every 90 days per HJ 75–2017.
Can it distinguish individual VOC species?
No. It reports total ionizable VOC concentration as ppmv or mg/m³ (as isobutylene equivalent); speciation requires GC-PID or GC-MS coupling.
Is remote firmware update supported over GPRS?
Yes—provided network latency remains below 800 ms and packet loss is <0.5%, with full integrity verification pre-installation.
What maintenance interval is required for the cold trap and filters?
Filter elements are rated for ≥6 months under typical refinery stack conditions; condenser cleaning is recommended quarterly based on accumulated condensate volume logs.
Does it comply with FDA 21 CFR Part 11 for electronic records?
Not natively—but audit trail data (user actions, calibration events, alarms) can be exported in CSV format for external Part 11–compliant archival systems.
