Stack Emissions Analysers
Continuous emissions monitoring systems for industrial stacks measuring particulate matter, SO2, NOx and CO with regulatory data acquisition.
Industrial stack emissions are the largest single controllable source of urban air pollution across Africa.
Industrial facilities are required under national air quality legislation to limit and report stack emissions, but without continuous monitoring at stack outlets, facilities cannot demonstrate compliance and regulators cannot enforce it. Jos•Hansen designs and supplies continuous emissions monitoring systems measuring particulate matter, sulphur dioxide, nitrogen oxides and carbon monoxide at industrial stack outlets. Data is transmitted to the national environment agency data acquisition system, generating automated compliance reports required under industrial air emission licence conditions.
Continuous compliance
CEMS measure stack emissions 24 hours a day, generating a continuous compliance record that periodic manual stack testing cannot provide, identifying process upsets and abatement equipment failures in real time.
Regulatory DAS
Data acquisition systems archive all parameter values with timestamps, calibration records and QA flags in the format specified by national environment agencies, generating automated compliance submissions.
Full stack turnkey
Jos•Hansen CEMS installations include stack gas conditioning, analyser cabinets, calibration gas delivery systems, sampling probes and complete data acquisition system with operator training.
CEMS provide the continuous compliance record that manual testing cannot.
European EN 14181 QAL2 procedures require installed CEMS to be validated against certified reference method parallel measurements under actual operating conditions. Jos•Hansen manages the complete QAL2 certification process, coordinating reference method testing, data comparison and system adjustment to demonstrate equivalence within required uncertainty limits. Annual surveillance testing confirms ongoing QA compliance, generating the certification documentation required for regulatory submission.
Extractive and in-situ CEMS technologies suit different stack conditions.
Extractive CEMS systems draw a representative sample of stack gas through a heated sample line to conditioned gas analysers, providing high accuracy measurement of SO2, NOx and CO at low concentration ranges. In-situ cross-stack analysers including laser absorption spectroscopy and DOAS systems measure directly in the stack gas stream without sample extraction, eliminating sample line maintenance in high-moisture stack gases. Opacity and particulate CEMS using forward scatter or LIDAR technology measure PM in the stack without extracting samples. Jos•Hansen specifies the appropriate technology for each stack gas composition and temperature condition.
QAL2 certification ensures CEMS data meets regulatory validity requirements.
European EN 14181 Quality Assurance Level 2 procedures require installed systems to be validated against certified reference method parallel measurements under actual operating conditions. Jos•Hansen manages the complete QAL2 certification process, coordinating reference method testing, data comparison and system adjustment to demonstrate equivalence within required uncertainty limits. Annual surveillance testing confirms ongoing QA compliance, generating the certification documentation required for regulatory submission.
Technical specifications.
Parameters
SO2, NOx (NO+NO2), CO, CO2, O2, opacity, PM (site-specific)
Technologies
Extractive NDIR/UV, in-situ DOAS/LAS, cross-stack opacity, forward scatter PM
Data logger
DAS archiving 1-min averages; 15-min, 1-hr averages for regulatory reporting
QA standard
EN 14181 QAL1/QAL2/AST; national equivalent for East African submissions
Calibration
Automated zero-span calibration using certified reference gases on configurable schedule
Reporting
Automated regulatory submission reports in national environment agency required format
CEMS measurement interval generating a continuous compliance record that identifies process upsets and abatement failures between periodic manual stack test visits
European EN 14181 Quality Assurance Level certification demonstrating CEMS equivalence to reference methods for regulatory acceptance of continuous emissions data
Continuous stack monitoring operation generating the automated regulatory submission records required under national industrial air quality licence conditions
Why Stack.
Regulatory licence compliance
CEMS generate the continuous compliance record required under national air quality licence conditions for industrial facilities above the regulatory threshold.
Process optimisation data
Continuous emissions data identifies combustion and abatement performance in real time, enabling operators to optimise process conditions and reduce emissions.
Automated reporting
Data acquisition systems generate regulatory submission reports automatically, eliminating manual data compilation and reducing compliance management burden.
Full turnkey CEMS delivery
Jos•Hansen manages specification, procurement, installation, commissioning, QAL2 certification and ongoing maintenance for all CEMS installations.
Partner with Jos Hansen
Talk to our procurement and operations teams about your next infrastructure, healthcare or scientific deployment.