Online Emission/Stack Monitoring System

homeOnline Emission/Stack Monitoring System


Drexel Group specializes in manufacturing of online pollution monitoring system for Water Quality, Emission/Stack Gas and Ambient Air Quality as per the CPCB Guidelines.

1. OCEMS (Online Continuous Emission Monitoring System)
  • Stack Gas /Flue Gas Monitoring
  • Dust Monitoring
  • Flow/Velocity Monitoring
Continuous Gas Analyzers
Flue Gas Monitoring Parameters:
  • SO2 (Sulfur Dioxide)
  • Nox (Oxides of Nitrogen)
  • CO (Carbon Monoxide)
  • CO2 (Carbon Dioxide)
  • O2 (Oxygen)
  • CH4 (Methane)
  • CH4 (Methane)
  • TOC (Total Organic Carbon)
  • VOC (Volatile Organic Compound)
  • Temperature
  • Flow /Velocity
  • Pressure
  • Moisture
Online Stack Laser Gas Monitoring Analyzer

NDIR Flue Gas Analyzer View

Front View
Online Gas Monitoring system
Rear View
Analyzers For Online Monitoring

Online NDIR Flue Gas Analyzer

Basic Emission gas parameters SO2 and Nox are measured with NDIR Principle.

Working Principle :

It adopts dual beams gas cell structure, one of the gas cell is injected measurement gas, another one gas cell is filled with reference gas, then Non-dispersive infrared sensor output the signal change , comparison between measured gas variation and reference gas signal to get the precise measurement result.

It is almost unaffected by the influence of the external environment like temperature fluctuations, voltage fluctuations, at the same time, it ensure excellent prolonged stability, easy maintenance, and high- precision measurement within 2%FS.

Technical Benefit of NDIR Flue Gas Analyzer :

NDIR Analyzer built-in water compensation adjustment device to eliminate the impact of water vapor on measurement

built-in special water compensation device. According to the testing and verification, the maximum impact of saturated air on SO2 and NO at room temperature is only 5-8ppm. So it can make sure the measurement accuracy

Eliminating the effects of environmental temperature.

Analyzer adopts temperature correction and sensor integrated thermostat(built-in thermostat device) to better solve the effects of environmental temperature.

Block Diagram:

Online Bio-Gas Analyzer

Industries We Serve

Govt. STPs

Govt. Hospitals


Pharmaceutical Industries

Bio-Medical Waste Treatment Plants

Textiles Industries

Automobile Industries

Sugar Mills

Food, Dairy & Beverages Industries


Who makes us proud

  • Phone Number

  • +91 172 5035098
    +91 172 2998398

  • Address

  • Drexel Electronics and Engineering products Pvt. Ltd., Plot No-442 Sector - 82 Mohali, Punjab, India - 160055