Cerex Monitoring Solutions, LLC. articles
Industrial facilities, energy production, and refining operations can be significant sources of gas-phase air pollutants. Some industrial emissions originate from fugitive sources (leaks) or process malfunctions and can be mitigated if identified. In recent amendments to the National Emission Standards for Hazardous Air Pollutants from Petroleum Refineries, the U.S Environmental Protection Agency (EPA) is for the first time requiring fenceline measurements for benzene as a surrogate for facil
All gas compounds absorb UV light energy at specific wavelengths. UV DOAS analyzers detect gas compounds found present in a reflected UV light beam. For a gas compound to be detected by a UV DOAS analyzer, there must be enough UV energy present at the wavelength’s point of absorption.
Cerex offers two UV bulb types – Deuterium and Xenon. The primary re
What is UV-DOAS?
UVDOAS (Ultraviolet Differential Optical Absorption Spectroscopy) is a monitoring technique which uses the absorbance of UV light to identify and quantify gases within a sample. Gases absorb unique wavelengths of light, creating a unique fingerprint of each compound within the absorbance spectrum; the amplitude of the absorbance wavelength is proportional to the concentration of t
Criteria gases, VOCs, Acids and Organics pre- sent refineries with a challenging list of compounds to monitor. The Cerex AirSentry FTIR adds significant capability to our UV Sentry to simplify 1180 and 12-15 compliance with a minimum of hardware and a single software and integration platform.
Both the AirSentry FTIR and UV Sentry data streams are readily integrated into plume dispersion models for source location and downstr
Cerex multi-gas FTIR analyzers are capable of detection of hundreds of gas compounds. Individual species are resolved and quantified through broadband spectral analysis. Broadband analysis allows flexibility to choose the absorbance peaks of interest for each gas monitored to meet application specific monitoring goals. Simultaneous analysis of multiple absorbance features for each species allows extended dynamic ranges for target gases. All Cerex FTIR analyzers may be calibrated
Gases absorb unique wavelengths of light and create a unique fingerprint of each compound within the absorbance spectrum; the amplitude of the absorbance wavelength is proportional to the concentration of the gas present in the sample. This is referred to as Beer-Lambert Law.
The absorption due to target gases is measured and recorded. using a pattern-matching classical least squares regression analysis, the measured absorption spectrum is compared to a vast library of stored referenc
For regulatory compliant refinery fence-line benzene monitoring, technology choices do not end with Method 325 A/B. As a component within a multi-technology approach to 40 CFR 63.658 compliance or as a stand alone system, the Cerex UV Sentry meets USEPA criteria for OP UVDOAS as an alternative method for regulato- ry compliant refinery fence-line benzene moni- toring.
- EPA Criteria for OP UVDOAS
- Sub PPB Detection Limits for Benzen
Cerex multi-gas FTIR analyzers are capable of detection of hundreds of gas compounds. Individual species are resolved and quantified through broadband spectral analysis. Broadband analysis allows flexibility to choose the absorbance peaks of interest for each gas monitored to meet application specific monitoring goals. Simultaneous analysis of multiple absorbance features for each species allows extended dynamic ranges for target gases. All Cerex FTIR analyzers may be calibrated
Cerex Monitoring Solutions is pleased to announce the release of the third generation model AirSentry FTIR multi-gas open path FTIR analyzer. The decision was made to fully redesign the analyzer to take full advantage of advances in hardware and software technology. The third generation design represents a full reconfiguration of the instrument. Goals were to reduce initial and operating costs and improve performance while retaining the valuable features and twenty year service life of the pr
Scott McEwan
Xonteck, Inc. of Fremont, CA is pleased to announce the agreement it has reached with CEREX MS LLC of Atlanta, GA for Xonteck, Inc. to become CEREX’s strategic partner and distributor to manage marketing, sales, and services for all Cerex products in Asia-Pacific region. This agreement is effective immediately. All distributions in this region will be managed through Xonteck, Inc. from either the Fremont, California office or the office in Wuhan, China. A team of perso
Paul