Understanding the Role of Continuous Emissions Monitoring Systems (CEMS)
In an increasingly regulated world, the ability to accurately monitor emissions in real time is no longer a luxury—it’s a necessity. Continuous Emissions Monitoring Systems (CEMS) provide the vital data industries need to:
- ✅ Comply with local and international environmental regulations (e.g. EN 14181, US EPA standards)
- ✅ Optimise combustion and process efficiency
- ✅ Demonstrate transparency and environmental accountability
- ✅ Avoid penalties and reduce downtime
From power generation to cement production, from waste incineration to marine and automotive testing, CEMS are at the heart of sustainable industrial operations.
From Concept to Compliance: How to Build a Reliable CEMS
At Signal Group, we don’t just offer analysers—we deliver complete monitoring solutions. Every component in your emissions monitoring system plays a role in ensuring long-term accuracy, traceability, and performance.
Here’s what a well-designed CEMS looks like, and the Signal Group products that make it possible:
The Complete CEMS Setup — Powered by Signal Group
1. Probe, Filtration & Sample Handling
It all begins at the stack. Our high-performance sampling probes are designed for harsh conditions and can be fitted with front-end filters to capture particulates before they enter the system.
➡️ These are coupled with heated sample lines to prevent condensation, ensuring gas composition remains unchanged during transport to the analyser.
2. Gas Analyser
This is where Signal Group truly excels. We manufacture a full range of reference-standard gas analysers:
- S4 PULSAR NDIR Analyser
Ideal for multi-gas measurements including CO, CO₂, NO, NO₂, SO₂, and CH₄. High accuracy, auto-calibration, and configurable outputs. - S4 SOLAR FID VOC Analyser
Based on flame ionisation detection, this is the gold standard for VOC and hydrocarbon measurement. - S4 QUASAR Chemiluminescence NOx Analyser
Ultra-sensitive NO and NO₂ measurement. Widely used in engine testing, catalyst development, and research applications. - S4 AURORA Paramagnetic Oxygen Analyser
Reliable and fast-response measurement of O₂, critical for combustion control and flue gas analysis.
3. Calibration & Linearity Testing
Regular calibration and linearity verification are essential to maintain analyser accuracy and regulatory compliance.
Signal Group offers two powerful tools for this purpose:
- 821S Gas Divider – Delivers traceable gas dilutions to perform automated multi-point linearity checks
- NOxGEN Zero Gas Generator – Produces synthetic air for zeroing, eliminating the need for gas cylinders and supporting EN 14181 QAL procedures
These systems are fully compatible with our analysers and can be integrated into automated calibration routines.
4. Calibration Gas Delivery System
Integrates with your analysers to automate zero/span gas inputs, helping ensure continual compliance and reduced manual intervention.
5. Data Acquisition System
Capture, store, and transmit your emissions data with confidence. Our systems are compatible with CEM software and can integrate via analog, digital or Modbus outputs.
6. Remote Control via Wireless Tablet
With our wireless tablet interface, engineers can control the analyser, perform calibrations, and check diagnostics — all from ground level.
Built for Your Industry
Whether you’re in:
- 🔥 Power & energy
- 🏭 Cement, glass, or metal production
- 🚢 Marine exhaust testing
- 🧪 Catalyst or engine R&D
- 🔧 Service and calibration/audit companies
Signal Group has the products, support, and experience to configure a CEMS tailored to your site’s needs.
Let’s Get Your CEMS Right — First Time
Our team provides:
- Design consultation
- Product selection and configuration
- Installation guidance
- Ongoing UK-based technical support
📩 Ready to improve your emissions monitoring or meet compliance targets?
Contact our specialists today at sales@signal-group.com
