Fully extractive CEM
State of the art components are chosen for your specific application
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Sample Probe and transport line
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Sample probe tubes are stainless steel, hastelloy, is optional. Filter housings are heated with
easy to clean 2 micron filters. Isolation valves are installed for intervaled purging to keep the
probe from plugging and more efficient use of daily calibrations gases, because you don’t
flood the stack with cal gas. This is also an invaluable tool for maintenance, allowing for easy
“leak check” of the sample system. Heated sample line keeps the sample above the dewpoint
to keep it from condensing. Sample line include:
2 - 3/8” lines for sample & instrument air, 2 - ¼” lines for cal gas & isolation valve and necessary power and signal wires. PFA Teflon is for most applications, stainless steel for low NOx and CO projects Sample probe and sample line RTD’s are also installed to warn of loss of heat, which may degrade the sample or reduce the life of equipment.
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Sample conditioning system
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Sample conditioner is a refrigerant type gas compressor cooler. Here the sample is chilled and dried preparing it for analysis. An integral moisture sensor alarm and secondary filter is also installed as a failsafe downstream of the conditioner. Pressure regulators with gauges and flow meters control the flowrates to individual analyzers. An RTD is also installed at the cooler exit to ensure the proper temperature is maintained. This is an excellent maintenance feature and also required by some regulatory agencies.
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Analyzers and PLC controller
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CEMTEK chooses the right analyzer for your application and gases being measured. Chemiluminescence is always used for NOx. NDIR was the choice for CO until the lower levels demanded the gas filter correlation technique. Paramagnetic O2 has proven accurate, reliable and cost effective. For mass measurement or pounds per hour, the calculation with fuel flow meters is the most cost effective but in-stack flow monitors can also be included in your CEM if required.
The system is controlled with a system controller, which performs the housekeeping functions as well as sending the CEM signals to your DCS or our DAHS.
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Services
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We are the CEMS service experts. We’ve designed our CEMS with the service technician in mind. This allows for ease of maintenance, reduced downtime and guaranteed certification, year after year. With sample system components easily accessible, it’s easy to follow your EPA QA/QC plan. CEMTEK is there for start-up, training, certification and long term maintenance. Our parts experts are always available to meet all your CEMS parts needs and ensure accurate, reliable reporting.
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