Stack Emission Monitoring
Continuous Emission Monitoring Systems (CEMS) for Stacks
Real-time SO₂, NOx, CO, PM2.5, and PM10 monitoring for boilers, kilns, furnaces, and industrial stacks — with direct CPCB/SPCB API data transmission via Envitrace.
Continuous Emission Monitoring Systems (CEMS) or Online Continuous Emission Monitoring Systems (OCEMS) are mandated by CPCB for industries with boilers, kilns, furnaces, and combustion stacks. CEMS instruments measure pollutant concentrations in flue gases in real time — and this data must be transmitted directly to CPCB/SPCB portals via a certified data logger.
Industries Requiring Stack CEMS
CEMS applicability depends on stack capacity, fuel type, and CPCB/SPCB notifications. Contact us for a compliance assessment for your specific installation.
Stack Emission Parameters Monitored
Pollutant Parameters
Process Parameters
Required parameters vary by industry and stack type. CPCB CEMS guidelines specify minimum parameters per industry category. Envitrace configures reporting to match the required parameter set and submission format for your board.
How Envitrace Stack CEMS Integration Works
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Process and stack assessment
We assess your stack dimensions, flue gas characteristics, operating temperature ranges, existing analyzer installations (if any), and required CPCB parameter set — before recommending instruments.
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Analyzer selection and supply
GPMSTech sources and integrates stack analyzers suited to your flue gas conditions — whether extractive or in-situ systems — from manufacturers whose instruments carry NPL verification and meet CPCB/SPCB CEMS acceptance criteria. NPL certificates are held by the respective manufacturers.
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Envitrace logger installation
The Envitrace CEMS logger connects to analyzers via Modbus, 4–20 mA, RS-485, or serial interfaces, validates and timestamps readings, buffers data locally, and maintains a complete audit trail.
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CPCB/SPCB direct API push
Data is transmitted securely via 4G/VPN to CPCB/SPCB API endpoints. Your compliance team also gets access to the Envitrace cloud dashboard for real-time stack monitoring, exceedance alerts, and regulatory reports.
Envitrace CEMS Dashboard Features
- Real-time stack emission concentration display per parameter
- Rolling 15-minute, 1-hour, and daily averages (as required by CPCB)
- Exceedance alerts when emission limits are approached or crossed
- Analyzer health and calibration status monitoring
- Calibration records and audit log for regulator review
- CPCB-format daily and monthly compliance reports
- Multi-stack view for facilities with several emission points
Frequently Asked Questions
Q: What is the difference between extractive and in-situ CEMS analyzers?
A: Extractive CEMS draw a flue gas sample from the stack, condition it (remove moisture, particulates), and analyse it in an instrument cabinet. In-situ CEMS measure directly in the flue gas stream without sampling. The right approach depends on flue gas temperature, moisture, dust loading, and the parameters required. GPMSTech assesses your stack conditions and recommends the appropriate system.
Q: Can Envitrace connect to existing CEMS analyzers already installed at our plant?
A: Yes. If you have installed CEMS analyzers with Modbus, 4–20 mA, RS-485, RS-232, or Ethernet outputs, Envitrace can connect to them and handle CPCB direct API transmission — without replacing the analyzer hardware.
Q: Does Envitrace provide calibration records for CPCB audit?
A: Yes. The Envitrace platform maintains a complete log of calibration events, zero/span checks, and instrument maintenance records — in a format suitable for CPCB/SPCB audit review.
Q: Can Envitrace monitor multiple stacks at the same facility?
A: Yes. Envitrace supports multi-stack deployments from a single dashboard. Each stack has its own station ID, parameter set, and compliance report — with a consolidated facility-level view available to site managers.
Need CEMS for your boilers or stacks?
Our team will assess your stack specifications, existing equipment, and CPCB requirements — before recommending a solution.
Request a CEMS Assessment