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Vasthi Instruments Vasthi Nitrogen oxides (NO- NO2 -NOX ) analyzer for measuring the Nox levels in the ambient (CAAQMS) purpose. It utilizes chemiluminescence technology indicated by US EPA as federal reference method for monitoring on multiple forms of nitrogen oxides.
Key Features:Permeation dryer on Ozone generatorCatalytic Ozone scrubberIndependent ranges for NOx, NO and NO2Compliance with US EPA reference methodVarious outputs include ethernet and RS232User friendly interface with large screenContinuous system diagnosis with alarmMulti-tasking software allows viewing test variables while operatingTemperature and pressure compensationInternal data logging with 1 min to 365 day multiple averages
Principle: Nitrogen oxides in ambient are measured indirectly by photometrically measuring the light intensity, resulting from the chemiluminescent reaction of nitric oxide (NO) with ozone (O3 ).
NO2 is first quantitatively reduced to NO by means of a converter. NO, which commonly exists in ambient air together with NO2, passes through the converter unchanged causing a resultant total NOx concentration equal to NO + NO2.
A sample of the input air is also measured without having passed through the converted. This latter NO measurement is subtracted from the former measurement (NO + NO2) to yield the final NO2 measurement.
PMT: The optical filter(660nm) attached on PMT provides reliable measurement, and temperature are controlled between 68 with only 0.1 fluctuation by a thermoelectric cooler, ensure the measurement stability.
Ozone generation:Permeation dryer are introduced in ozone generation to provide long system durability without any replacement.An catalytic ozone scrubber is standard for maximum safety and pump life before exhaust.
Sneha Reddy (VASTHI INSTRUMENTS Pvt Ltd)
Plot No. 21 & 22, Block No. 24, Phase – 4, AutoNagar,, Guntur, Andhra Pradesh - 522001, India
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