Continuous Ambient Air Quality Monitoring System (USEPA Certified)

Vasthi Instruments are global leaders in importing of so2 analyzer,gas analyzers, gas detectors,Ozone Analyzers, online calibrator for calibration,dew point analyzer,particulate monitors,Continuous Ambient air quality monitoring system (CAAQMS), stack gas analyzers and have been supplying instruments to customers worldwide, Our multidisciplinary team of scientists, physicians, engineers, and regulatory consultants with decades of global experience brings you the quintessential mechanism that provides complete safety accuracy and durability.

Vasthi Engineers was formed with visionary thinking and innovative ideas resulting in innovative products and solutions. We enhance our product quality by the continuous process of research and development. We have WIDE range of models to suite various site conditions and processes.

CAAQMS airpointer Catalogue (1)


Vasthi Instruments Continuous Ambient Air Quality Monitoring System (CAAQMS) using Ultraviolet fluorescence principle, combined with the most advanced microprocessor technology provides accurate, reliable low ppb-ppm levels of SO2,NOx,O3,CO etc.., suitable for atmospheric monitoring and dilution of pollution online monitor application.

Continuous Ambient Air Quality Monitoring System (CAAQMS) has full control over all the functions of this instrument at the same time, can also provide important operating parameters of online instruction. During the measurement, real-time automatic compensation of the temperature and pressure changes.


  • Continuous belt alarm post
  • High-precision Switzerland mass flow controller
  • RS-232 port for remote control
  • Digital output the instrument parameters
  • The dilution ratio, fast response
  • With USB and ethernet interfaces
  • Gas phase titration quartz chambers, calibration gas interface
  • Color display, touch screen operation
  • Optional ozone generator and ozone photometer
  • Large-capacity memory automatically stores historical data
  • Microprocessor realization of multi-function operation
  • Software allows monitoring during the operation to test data





Dilution system


Dilution air flow rate range rate range                                            Gas flow rate range


0-5 LPM, 0-10 LPM, 0-20 LPM optional

(0-50) sccm, (0-100) sccm, (0-200) sccm

Flow control

Flow line

Optional 1% F.S.

0.5% F.S.

Flow control repeatability

Zero air supply requirements

Gas inlet

Dilution air inlet

Response time

0.2% F.S.

10 LPM@ 30 PSI



T98 < 60 S

Ozone generator The maximum output 6 ppm
The minimum output


Response time

100 ppb

±1%/7 days

T98 < 180 S

Ozone photometer Range


(0.1-10)” ppm

1.0 ppb


Lifting time

1% F.S.

<20 s

Response time

Zero point drift

Span drift

Sample gas flow

180s (98%)

<1.0 ppb / 7 days

<2% / 7 days

800 sccm

The whole machine Power supply 200-240V, 50/60Hz, 200W
Device dimensions (H*W*D) 178mmx432mmx600mm
Instrument weight

Operating temperature range

Operating humidity range

<15 KG


(0-95)% RH


Communication protocol

Rs232 & RS 485 communication,

Ethernet (optional)