Ambient Ozone Analyzer

Vasthi Instruments are global leaders in manufacturing of Ambient Ozone Analyzer 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 Instruments 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.


Ambient Ozone Analyzer by ultraviolet spectrophotometry principles, combined with the most advanced microprocessor technology, provides accurate and reliable low-content ppb-ppm-level 03 detection, application suitable for atmospheric monitoring requirements.

UV absorption Ambient ozone Analyzer based on Beer-Lambert law for monitoring low concentration of ozone concentrations in ambient air.

A 254nm UV light through the sample cell is absorbed by the ozone in the sample cell, absorption value is proportional to the concentration of ozone. Through the solenoid valve cycle alternating samples through measuring the sample gas and contains no ozone. Finally, we get a real stable measurement of ozone concentration.

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.


  • Measuring range 0-100 ppb to 0-10 ppm, user-selectable
  • Dual range and automatic setting range
  • Ultraviolet spectrophotometric measuring principle • Microprocessor realization of multi-function operation
  • Software allows monitoring during the operation to test data
  • Continuous self test with alarm light attenuation self test feature bi-directional
  • Rs-232 port for remote control
  • Digital output the instrument parameters                                                                                                       
  • Adaptive signal filtering techniques optimise response time   
  • With temperature and pressure compensation with USB and Ethernet interfaces                                    
  • Color display, touch screen operation
  • Large-capacity memory automatically stores historical data
  • Model: V.AIR – 9004






Min:  0-100 ppb       

Max:  0-10 ppm       

automatic range switching                                                                             

Concentration Units

ppb, ppm, ug/m3, mg/m3

Zero noise

0.05 ppm

Quantum noise

0.5%  50 ppb or 0.2 ppb or more

Detection limit

1 ppb

Zero drift (24h)

Core 1 ppb

Zero drift (7 days)

Core 2 ppb

Span drift (7 days)

<1 % F.S.


<1% F.S.



Response time

<20s to 95%


(800 ± 80) sccm

Operating temperature range

(5 – 40)°C

Operating humidity range

(0 – 95)% RH

Instrument size


Instrument weight

<15 KG

Power supply

200-240V, 50/60Hz, 200W


Analog outputs, digital output, R232, R485, Ethernet interface, USB interface

Communication protocol