Real-time stack gas analysis for NOx, SO₂, O₂, CO, CO₂ & SPM. Trusted by 595+ installations across Delhi and India. ISO 9001 | ISO 14001 certified.
What Is CEMS?
A Continuous Emission Monitoring System (CEMS) measures and records pollutant concentrations — including NOx, SO₂, CO, CO₂, O₂, and particulate matter (SPM) — in real time from industrial flue gas stacks. Compliance with CPCB and SPCB guidelines is mandatory for a wide range of industries under India's environmental regulations.
Drexel Electronics' CEMS solutions (Model DX4P) use proven Extractive / NDIR technology to deliver accurate, continuous data — transmitted directly to regulatory servers including the CPCB data portal.
Technical Details
Drexel's CEMS (Model DX4P) is engineered to meet Indian regulatory standards while providing industry-leading measurement reliability and ease of maintenance.
Simultaneously measures NOx, SO₂, CO, CO₂ with optional O₂ (Zirconium/EC cell), PM (DC-Triboelectric / Dust Opacity) and NO, CH₄ via modular expansion ports.
Continuous real-time data stored locally and transmitted automatically to CPCB / SPCB servers. Accessible remotely via inbuilt software with a built-in 15" display (optional 7" touch screen).
Outputs via RS-485 (Modbus RTU) and 4–20 mA analog allow seamless integration with existing SCADA, DCS or PLC infrastructure. Plug-and-play compatibility with Drexel SCADA systems.
Designed and certified to comply with CPCB Guidelines for Online Continuous Emission Monitoring. Approved for industries mandated under Environment (Protection) Act obligations.
Built-in 3-hour battery backup ensures continuous data capture during power interruptions, maintaining regulatory compliance without data gaps.
The extractive-type architecture with Drexel's gas cooling assembly and heated sampling probe ensures minimal maintenance downtime and long sensor life in corrosive stack environments.
| Parameter | Details |
|---|---|
| Model No. | DX4P |
| Make | Drexel Electronics and Engineering Products Pvt. Ltd. |
| Technology | Extractive Type |
| Measurement Principle | NDIR (Non-Dispersive Infrared) |
| Standard Parameters | NOx, SO₂ |
| Optional Parameters | O₂ (Zirconium / EC), PM (DC-Triboelectric / Dust Opacity), NO, CH₄ |
| Output Interfaces | RS-485 (Modbus RTU), Analog 4–20 mA |
| Display | Built-in 15" (Optional 7" Touch Screen) |
| Battery Backup | 3 Hours Built-in |
| Data Transmission | Online to CPCB / SPCB Server |
| Certifications | TUV, ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, CE Directive |
| Enclosure Rating | IP 68 (Wall-mounted compact cabinet) |
Why Drexel?
With over a decade of environmental monitoring expertise and more than 1,000 successful deployments, Drexel Electronics delivers CEMS solutions built for Indian regulatory requirements and industrial realities.
Drexel is a registered MSME manufacturer, making procurement straightforward for government bodies, PSUs, and public institutions under GeM portal guidelines.
TUV-certified with ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 — plus CE Directive compliance — ensures every CEMS unit meets international quality benchmarks.
Each CEMS installation is configured for the specific flue gas composition, flow rates, and regulatory parameters of your industry and location across Delhi NCR and pan-India.
A dedicated service team provides installation, commissioning, calibration, and preventive maintenance visits. Remote diagnostics via inbuilt CPU for fast fault resolution.
From flue gas heated sampling probes and gas cooling assemblies to LED display boards and SCADA systems — Drexel supplies every component of a complete CEMS installation.
595+ CEMS / OCEMS systems successfully commissioned across textiles, power, pharma, biomedical waste, and defence sectors with live data on server since day one.
Industries We Serve
Our Continuous Emission Monitoring Systems are deployed across a broad range of regulated sectors where CPCB mandates real-time stack monitoring.
Get In Touch
Plot No 442, Industrial Area, Sector 82, Mohali, Punjab — 160055
Mon – Fri: 9:00 am – 5:30 pm
Sat: 9:00 am – 2:00 pm
TUV · ISO 9001:2015 · ISO 14001:2015 · ISO 45001:2018 · CE Directive
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