Real-time, CPCB-compliant monitoring of PM2.5, PM10, SO₂, NO₂, CO, and more. India's trusted AQMS manufacturer with 1,000+ successful installations — delivering clean-air intelligence for industry, government, and public infrastructure.
An Ambient Air Quality Monitoring System (AQMS or AAQMS) is a continuous, real-time instrument that measures the concentration of harmful pollutants in outdoor air. Unlike stack emission monitors, an AQMS measures the air that communities, workers, and ecosystems breathe — tracking pollutants across open environments such as city zones, industrial estates, highways, and construction sites.
Drexel's PLC & SCADA-based AQMS is engineered to meet CPCB and SPCB guidelines, transmitting data directly to regulatory servers in real time — ensuring full compliance without manual effort.
Our dual-channel AQMS (Model DX4P-A) uses Beta Ray Attenuation technology to simultaneously measure multiple pollutants with high precision — at lower cost than separate instruments.
Fine particulate matter ≤ 2.5 µm
Coarse particulate matter ≤ 10 µm
Sulphur Dioxide concentration
Nitrogen oxide and dioxide
Carbon Monoxide levels
Carbon Dioxide concentration
Ozone concentration (optional)
Ambient temperature (meteorological)
Relative humidity (optional)
Wind speed & direction (optional)
Every Drexel Ambient Air Quality Monitoring System is designed to maximize uptime, data accuracy, and regulatory compliance — with minimal operator intervention.
Live data streamed directly to CPCB / SPCB servers via RS-485, 4–20 mA analog output, or GPRS/LAN — no manual uploads required.
Fully compatible with PLC and SCADA platforms. Enables centralized monitoring of multiple AQMS units from a single control room.
15" built-in display (optional 7" touchscreen) with onboard CPU for real-time trend visualization and fault diagnostics.
Inbuilt UPS ensures uninterrupted monitoring even during power failures — critical for continuous compliance reporting.
Automatic alarms for sensor faults, power failures, and data anomalies. Remote diagnostics accessible via onboard CPU.
Optional scrolling LED board for public-facing AQI display — ideal for municipalities, airports, and construction hoardings. Connected via 2-wire only.
Online zero & span calibration for all gases. Reduces maintenance downtime and ensures long-term measurement accuracy.
Wall-mounted, weatherproof IP68 enclosure — robust enough for outdoor industrial environments and construction sites.
Parameters, communication protocols, enclosure type, and output formats can all be tailored to your specific site and regulatory requirements.
Industry-grade specifications built for Indian climatic and regulatory conditions.
| Parameter | Specification |
|---|---|
| Model | DX4P-A (Drexel) |
| Measurement Principle | Beta Ray Attenuation (BAM) |
| Primary Parameters | PM2.5, PM10 (dual channel) |
| Additional Gas Parameters | CO, CO₂, SO₂, NO, NO₂ (configurable) |
| Output Interface | RS-485, Analog 4–20 mA |
| Display | 15" built-in (optional 7" touchscreen) |
| Battery Backup | 3 Hours (inbuilt UPS) |
| Enclosure | IP68 wall-mounted weatherproof cabinet |
| LED Display Connection | 2-wire (RS-485 to scrolling display) |
| Data Transmission | CPCB / SPCB server via GPRS / LAN |
| Calibration | Auto zero & span; online gas calibration (optional) |
| Alarms | Online system failure alerts |
All Drexel AQMS units are designed, tested, and certified to meet applicable Indian and international environmental standards.
We don't just supply equipment — we deliver end-to-end environmental monitoring solutions backed by deep engineering expertise and after-sales support.
Specialists exclusively in environmental and industrial monitoring systems — not a generalist electronics company.
Proven track record across industries, municipalities, and government bodies throughout India and abroad.
Complete automation capability from hardware to software — no third-party dependency for system integration.
Systems are pre-configured to transmit data directly to CPCB/SPCB servers — significantly reducing compliance setup time.
Dedicated support team for calibration, maintenance, data troubleshooting, and regulatory query resolution.
Simultaneous PM2.5 and PM10 measurement from a single Beta Ray Attenuation unit — reducing capital and operating costs.
Projects delivered in India, Sudan, Kenya, Iraq, and Egypt — with strong local service networks across India.
Parameters, outputs, enclosures, and communication protocols tailored precisely to your site and regulatory brief.
Drexel AQMS is deployed across a wide range of sectors where real-time outdoor air quality data is essential for compliance, safety, or public reporting.
Delhi ranks among India's most pollution-affected cities, making CPCB-compliant AQMS deployment a critical regulatory and public health requirement. Drexel provides end-to-end AQMS solutions — from site assessment and system installation to CPCB server integration and long-term maintenance — for industries and government bodies operating in Delhi and NCR.
Plot No. 442, Industrial Area, Sector 82,
Mohali, Punjab – 160055, India
Mon–Fri: 9:00 am – 5:30 pm
Saturday: 9:00 am – 2:00 pm
Whether you need a single ambient air quality monitor or a networked multi-point AQMS deployment, our engineers will assess your site and recommend the most cost-effective, CPCB-compliant solution.
