★ Trusted Since 1989  India's Premier Environmental Monitoring Brand

Premium Stack Emission Monitoring System (CEMS) Supplier in Delhi

India's trusted measuring instruments supplier delivering CPCB-compliant, real-time emission monitoring solutions across 1,000+ industrial installations nationwide.

ISO 9001:2015 ISO 14001:2015 ISO 45001:2018 TUV Certified CE Compliant CPCB Approved
📞 Get a Free Quote Call: +91-9316660098
1000+Successful Installations
35+Years of Experience
595+Stack Monitoring Systems
24/7Technical Support
About Drexel Electronics

Delhi's Leading Measuring Instruments Supplier for Industrial Emission Monitoring

Drexel Electronics and Engineering Products Pvt. Ltd. is Delhi's foremost measuring instruments supplier, specializing in Stack Emission Monitoring Systems (CEMS), Online Continuous Emission Monitoring, and comprehensive Industrial Stack Gas Analysis solutions. With 35+ years of engineering expertise and over 1,000 verified installations across India, we deliver precision emission monitoring technology engineered for real-world industrial demands.

Our advanced CEMS technology provides real-time, accurate monitoring of industrial emissions — helping businesses across Delhi and pan-India achieve full compliance with CPCB (Central Pollution Control Board) guidelines while simultaneously improving operational efficiency and reducing environmental risk.

German Engineering Precision MSME Registered CPCB-Approved Systems Customized Solutions
Online Stack Gas Monitoring Analyzer by Drexel Electronics Online SPM Monitoring Analyzer Effluent Quality Monitoring Analyzer Ambient Air Quality Monitoring System
Our Core Solutions

Comprehensive Stack Emission Monitoring System (CEMS) Solutions

Drexel manufactures and supplies state-of-the-art Online Continuous Emission Monitoring Systems engineered for 24/7 continuous operation and complete regulatory compliance.

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Multi-Parameter Gas Analysis

Real-time monitoring of SO₂, NOₓ, CO, CO₂, O₂, HCl, HF, and other critical emission parameters with laboratory-grade accuracy for complete regulatory reporting.

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Particulate Matter (SPM) Monitoring

Advanced DC-Triboelectric and Laser Back Scattering technology delivering precise SPM/PM measurements from 0–1,000 ppm in real time.

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VOC & TOC Emission Monitoring

Specialized FID/PID sensors for Volatile Organic Compounds and Total Organic Carbon detection — ideal for pharmaceutical, chemical, and coating industries.

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Cloud-Based Data Management

Automatic, secure data transmission to CPCB servers with up to 2 years of cloud-stored historical emission records for audit-ready compliance.

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Extractive Monitoring Systems

High-accuracy extractive CEMS featuring heated sampling probes and multi-stage gas cooling assemblies for clean, conditioned sample analysis.

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Automated Remote Calibration

Built-in remote zero and span calibration minimizes downtime and guarantees consistent measurement accuracy throughout system operation.

Technical Specifications

SO₂, NOₓ & CO Emission Testing — Measurement Parameters

Every Drexel CEMS delivers automatic zero/span calibration, temperature and pressure compensation, and interference correction algorithms for maximum measurement reliability.

Parameter Measurement Range Accuracy Technology CPCB Compliant
Sulfur Dioxide (SO₂) 0 – 1,000 ppm ±2% NDIR / UV Fluorescence ✓ Yes
Nitrogen Oxides (NOₓ) 0 – 1,000 ppm ±2% Chemiluminescence / NDIR ✓ Yes
Carbon Monoxide (CO) 0 – 1% ±2% NDIR ✓ Yes
Carbon Dioxide (CO₂) 0 – 12% ±2% NDIR ✓ Yes
Oxygen (O₂) 0 – 25% / 0 – 100% ±2% Zirconium Oxide / Paramagnetic ✓ Yes
Particulate Matter (SPM) 0 – 1,000 mg/Nm³ ±5% DC-Triboelectric / Laser Back Scatter ✓ Yes
VOC / TOC 0 – 10,000 ppm ±2% FID / PID ✓ Yes
HCl / HF 0 – 100 ppm ±3% Electrochemical / FTIR ✓ Yes

⚡ Analysis Speed: Complete gas analysis cycle completed in just 2–3 minutes, enabling rapid response to emission exceedances.

Measurement Technologies

Industrial Stack Gas Analysis Technologies

Our Industrial Stack Gas Analysis systems employ multiple proven analytical methods to deliver the highest measurement accuracy across diverse industrial environments.

NDIR – Non-Dispersive Infrared

Precise CO, CO₂, SO₂, and NOₓ measurement with minimal cross-sensitivity between gas components.

FTIR / DOAS Spectroscopy

Multi-component gas analysis for simultaneous detection of multiple pollutants in a single measurement cycle.

Zirconium Oxide Sensors

High-accuracy oxygen concentration measurement across wide ranges from 0–1,000 ppm up to 0.1–95%.

Electrochemical Detection

Sensitive detection of toxic and corrosive gases including HCl, HF, and trace acid components.

DC-Triboelectric Method

Proven in-stack particulate matter monitoring using probe electrification — ideal for high-temperature, high-moisture stacks.

Laser Back Scattering

Non-contact optical particle detection providing real-time dust concentration analysis with minimal maintenance.

System Architecture

Complete Extractive Emission Monitoring System Components

Drexel's extractive CEMS integrates advanced sample conditioning with multi-analyzer technology for maximum measurement accuracy in even the harshest industrial environments — rated for –20°C to +60°C with full corrosion and dust resistance.

01

Heated Sampling Probe

Stainless steel with integrated heating (180–200°C) to prevent sample condensation and contamination.

02

Heated Sample Transport Line

Insulated, temperature-controlled tubing maintaining sample integrity from probe to analyzer.

03

Gas Cooling Assembly

Multi-stage cooling reducing sample temperature to 2–5°C for efficient moisture removal.

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Multi-Stage Filtration

Progressive filtration system protecting sensitive analyzer components from particulate damage.

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Sample Pump & Flow Control

Diaphragm/piston pumps with precision flow meters ensuring stable 1–3 L/min sample delivery.

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Automated Calibration Unit

Solenoid valve manifold for scheduled remote zero and span verification without manual intervention.

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15" Touch Screen Display

User-friendly interface with real-time parameter visualization, trend graphs, and alarm management.

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3-Hour Battery Backup

Uninterrupted emission monitoring during power outages — no data gaps in CPCB reporting.

Industries We Serve

Stack Emission Monitoring Across Key Industries

Drexel Electronics has successfully delivered CEMS solutions to diverse industrial sectors across Delhi, NCR, Punjab, Haryana, and pan-India.

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Thermal Power Generation

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Cement Manufacturing

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Textile & Dyeing (205+ installs)

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Chemical & Pharmaceutical

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Biomedical Waste (215+ installs)

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Waste-to-Energy Plants

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Metal Smelting & Refining

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Paint & Coating Operations

1,000+

Successful System Installations

35+

Years of Industry Excellence

595+

Stack Monitoring Systems (CEMS)

215+

Biomedical Waste BMWTP Systems

99.8%

Average System Uptime

Our Competitive Advantage

Why Choose Drexel as Your Measuring Instruments Supplier?

Eight reasons industries across India consistently choose Drexel Electronics for mission-critical emission monitoring.

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Fully Customized Solutions

Every CEMS is engineered to your specific industrial process, stack dimensions, and emission profile — no one-size-fits-all approach.

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Government Compliance Guaranteed

All systems designed and manufactured strictly per CPCB guidelines and state pollution control board requirements.

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Real-Time CPCB Data Transmission

Automatic IoT-enabled data upload to CPCB servers every 30 minutes via secure internet or mobile network.

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Comprehensive After-Sales Support

Dedicated customer care executives and field service engineers ensure prompt issue resolution and minimal downtime.

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Expert Retrofit & Upgrade Services

Seamlessly upgrade obsolete or underperforming emission monitoring equipment with Drexel's modern technology stack.

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Innovation Pedigree

Drexel pioneered India's first waste gas turbine in 1997 and has delivered advanced automation for Fortune 500 companies.

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Competitive, Transparent Pricing

World-class system quality at cost-effective price points — with clear, no-hidden-cost commercial proposals.

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Comprehensive Operator Training

Hands-on training programs covering system operation, maintenance, calibration, and troubleshooting for your team.

Our Process

Your Path from Inquiry to Commissioned CEMS

A clear, step-by-step engagement process ensuring your project is delivered on time, on spec, and fully compliant.

1

Contact & Consultation

Speak with our CEMS experts via phone, email, or inquiry form.

2

Site Assessment

On-site evaluation of stack configuration, emission sources, and installation requirements.

3

Custom Proposal

Detailed technical and commercial proposal tailored to your process.

4

Installation

Professional installation by certified engineers within 2–4 weeks.

5

Commissioning & Training

Full system testing, calibration, operator training, and CPCB connectivity verification.

6

Ongoing AMC Support

Annual maintenance contracts with 24/7 helpline and scheduled calibration checks.

Client Success Stories

Trusted by Industry Leaders Across India

Hear from the environmental managers, plant managers, and administrators who rely on Drexel CEMS every day.

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"Drexel's CEMS solution not only ensured our CPCB compliance but also helped optimize combustion efficiency, delivering measurable fuel cost savings year over year."
Environmental Manager Leading Textile Manufacturer, Delhi NCR
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"The Drexel team installed our biomedical waste incinerator monitoring system within the agreed timeline. We've maintained 99.8% system uptime over the past two years."
Hospital Administrator Multi-Specialty Healthcare Facility, Punjab
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"Upgrading to Drexel's extractive CEMS transformed our environmental management. The improvement in measurement accuracy and real-time data access has been remarkable."
Plant Manager Chemical Processing Unit, NCR Region

Trusted by Maruti Suzuki vendors, Escorts Ltd, HMT Pinjore, Bell Ceramics, Indian Acrylics Ltd, Railway Coach manufacturers, and numerous Fortune 500 companies.

ISO 9001:2015 ISO 14001:2015 ISO 45001:2018 TUV Certified CE 2006/42/EC CE 2014/35/EU CE 2014/30/EU MSME Registered CPCB Approved
FAQs

Frequently Asked Questions about CEMS

A Stack Emission Monitoring System (CEMS) continuously measures and records pollutant emissions from industrial stacks and chimneys, ensuring real-time regulatory compliance with CPCB and state environmental board requirements.
CPCB mandates CEMS for thermal power plants, cement plants, chemical and pharmaceutical industries, textile dyeing facilities, waste incinerators, and any industry with significant air emissions as specified in their environmental clearance conditions.
Drexel CEMS can simultaneously monitor SO₂, NOₓ, CO, CO₂, O₂, HCl, HF, VOC, TOC, Particulate Matter (SPM/PM), stack temperature, pressure, flow velocity, and moisture — all in real time.
Our systems maintain ±2% measurement accuracy for gaseous pollutants and ±5% for particulate matter, exceeding CPCB and EPA accuracy requirements.
Extractive CEMS extracts gas samples from the stack for controlled-environment analysis, offering superior accuracy. In-situ CEMS measures directly inside the stack for faster response. Drexel specializes in extractive systems for maximum measurement precision and CPCB compliance.
Typical installation and commissioning takes 2–4 weeks, depending on stack configuration, site accessibility, and system customization requirements.
Yes. Drexel specializes in retrofitting and upgrading obsolete or underperforming CEMS with modern analyzers, calibration units, and direct CPCB connectivity — extending equipment lifespan and restoring full compliance.
Drexel CEMS features built-in IoT modules that automatically transmit emission data to CPCB/SPCB servers every 30 minutes via secure internet or mobile network connection, with tamper-proof audit trail logging.
Get in Touch

Request Your Free CEMS Consultation & Quote

Ready to ensure full environmental compliance? Our CEMS specialists will assess your requirements and provide a detailed, no-obligation technical and commercial proposal.

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Head Office Plot No 442, Industrial Area,
Sector 82, Mohali, Punjab – 160055
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Office Hours
Mon–Fri: 9:00 AM – 5:30 PM
Saturday: 9:00 AM – 2:00 PM
Sunday: Closed

Send Us Your Requirements

Ready to Achieve Full Emission Compliance?

Join 1,000+ satisfied industries trusting Drexel Electronics for certified, CPCB-compliant Stack Emission Monitoring Systems. Get your free site assessment today.

📞 Call +91-9316660098 ✉️ Email Your Requirements
  • Phone Number

  • +12362090098
    +91-9316660098
    Toll-free no :- 1800-123-440098

  • Address

  • Plot No 442,Industrial Area, Sector 82,Mohali Punjab, India 160055

Online CO, CO2, O2 Analyzer

TUV, ISO 14001:2015, ISO 9001:2015, ISO 45001:2018, related to CE Directive(s)