ISO CERTIFIED. 9001:2015, 14001:2015, 45001:2018
PREI Group is a leading manufacturer and integrator of Continuous Emission Monitoring Systems (CEMS) in Chennai, offering real-time measurement of gas and particulate emissions from stacks, boilers, and furnaces. Our systems monitor SO₂, NOx, CO, CO₂, O₂, and PM, supported by advanced analysers, sample conditioning units, calibration modules, and DAHS for recording, reporting, and regulatory compliance. We provide both Extractive CEMS, where gas is drawn from the stack and conditioned before analysis, and In-situ CEMS, where sensors are directly mounted in the stack for continuous real-time monitoring. Built for harsh industrial environments and fully integrable with DCS/SCADA systems, our Zone 1 and Zone 2 certified panels meet required Indian and international standards, ensuring accuracy, reliability, and operational confidence for power plants, refineries, steel, cement, and waste management industries.
| Component | Description |
|---|---|
| Gas Analyzer Unit | Measures gases like SO₂, NOx, CO, CO₂, and O₂ using technologies such as NDIR, Chemiluminescence, UV Fluorescence, and Paramagnetic sensors; particulate matter (PM) measured using opacity or triboelectric sensors. |
| Sample Handling System | Extracts gas from the stack and conditions it using a probe, filter, cooler, and pump to ensure proper analysis. |
| Flow, Pressure & Temperature Sensors | Monitor stack gas flow rate and environmental conditions to ensure accurate emission calculations. |
| Data Acquisition & Handling System (DAHS) | Collects, records, trends, and transmits emission data; generates necessary compliance and regulatory reports. |
| Calibration System | Uses automatic calibration with zero gas and span gas to maintain accuracy and reliability of measurements. |
We have decades of experience designing, engineering, and deploying advanced CEMS solutions for complex emission monitoring and environmental compliance applications.
All systems are specifically tailored to industry gases, dusts, and process temperatures, to make sure the emissions are accurately, reliably and continuously measured.
Every system meets CPCB and TNPCB emission standards to the latter and guarantees the integrity of data and smooth reporting to the regulatory authorities to conduct statutory audits.
Equipped with modern DAS software and remote connectivity for real-time monitoring, report generation, and secure data transmission to pollution boards.
The use of CEMS in coal, gas-based and biomass-based power plants is aimed at the monitoring of SO2, NOx, CO, and particulate emissions in the case of stacks and boilers. They guarantee adherence to CPCB and EPA requirements that allow tracking the emissions in real-time and provide corrective actions to address the quality of air and efficiency of operation.
CEMS monitoring of kiln and preheater emissions such as dust and combustion gases are applied in cement plants. They offer a constant view of the efficiency of combustion, the trend of pollutants and aid in ensuring compliance in addition to maximizing fuel consumption and minimizing waste in the processes.
CEMS is important in the monitoring of emissions of flue gases by heaters, reformers, and incinerators. They make sure that the environmental rules are strictly followed, they identify violations in time, and they deliver the valid information that will be used to report pollution and optimize the processes in hazardous areas.
CEMS are used to measure emissions produced by the melting, casting, and refining process in steel furnaces and metal processing units. They assist industries to be environmentally compliant, reduce air pollutants and enhance the entire process control and energy efficiency.
Municipal and industrial incinerators of waste also apply CEMS to monitor the normal discharge of gases and particulates during the burning process. The system provides control over the emission limits, facilitates the regulatory reporting and promotes safe and sustainable waste management activities.
Measurement of emissions due to reactors, boilers and process vents is carried out by the placement of CESM. They can offer real-time information on gases such as NH 3, HCl, as well as VOCs, and optimize reactions in the process, which guarantees environmental safety, and long-term sustainability compliance.
Get accurate, compliant, and long-lasting emission monitoring solutions engineered for your industry. Connect with Preipolar Engineers today to ensure your operations stay efficient, compliant, and environmentally responsible.
