Ambient Carbon Monoxide Analyzer

Vasthi Instruments are global leaders in manufacturing of Ambient Carbon Monoxide 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 Carbon monoxide Analyzer uses non-dispersive infrared gas filter correlation technology, combined with the most advanced microprocessor technology provides accurate, reliable Co ppm level detected, suitable for application of atmospheric monitoring requirements.

Working principle non-dispersive infrared gas Analyzer carbon monoxide filter correlation technology. CO molecules on the specific laws of infrared optical absorption in accordance with Beer-Lambert. Comparison of infrared energy in the sample and reference gas absorption. Concentrations of CO can be obtained.

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 0-50 ppm to 0-1000 ppm, User-selectable
  • Dual range and automatic setting range
  • Microprocessor realization of multi-function operation
  • Software allows monitoring during the operation to test data
  • Continuous with alarm function
  • Bi-directional
  • Rs-232 port for remote control
  • •Digital output the instrument parameters
  • Adaptive signal filtering techniques optimize 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 – 9003






Min:  0-50 ppm       

Max:  0-1000 ppm       

automatic range switching                                                                             

Concentration Units

ppb, ppm, ug/m3, mg/m3

Zero noise

0.02 ppm

Quantum noise

0.5% F.S.

Detection limit

0.04 ppm

Zero drift (24h)

Core 0.2 ppm

Zero drift (7 days)

Core 0.4 ppm

Span drift (7 days)

<1 % F.S.


<1% F.S.



Response time

<60s to 95%


(800 ± 80) sccm

Operating temperature range

(5 – 40)°C

Operating humidity range

(0 – 95)% RH

Instrument size


Instrument weight

<20 KG

Power supply

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


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

Communication protocol