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Gas Analyzers FAQWhat is a Gas Analyzer?

Gas Analyzer is an instrument used to measure the concentration of a

known gas in given mixture of gases from a process / stream.

Why are Gas Analyzer Used?

Gas Analyzer is used to Monitor Process, Enhance Safety, Increase

Efficiency, Monitor Emission and Improve Quality.

Where are Gas Analyzer used?

They are used in applications in all major industries such as Refineries &

Petrochemicals, Chemical Plants, Critical process, Inerting Applications,

pharmaceuticals, Fertilizers, Glass, semiconductors, Boilers, Heaters,

Thermal crackers, Incinerators, continuous monitoring of Stack,

Industrial gas producers and its users

What is the difference between Gas Detectors and Analyzers?

Detectors detect situations outside normal operating parameters and are

set up to alarm.Analyzers determine in real time, the quantity/concentration a said gas

is in the stream / Process.

What is the different measurement techniques used in Gas

Analyzers?

There are many different sensors used to analyze gases. Types of

popular sensors include Electrochemical, Paramagnetic, Thermal

conductivity, Infrared, PID, FID etc.

Why are different kinds of sensors used?

The sensors are designed to detect / measure the unique physical orchemical properties of gases. Hence to distinguish between different

gases in a mixture of gases (a process or a stream) different sensor

techniques are used.

Further Sensor choice also depends upon required accuracy,

specifications, life expectancy and cost.

Does Gas Analyzer equipment need maintenance and calibration?

Yes. However in a properly Designed and commissioned system

Maintenance requirement is minimal and may only consist of a visual

inspection and verification of operative parameters and periodic

replacements of consumables.Calibration frequency depends on sensor type, criticality of application

and accuracy requirement of the process.

What is calibration?

Calibration verifies that the Analyzer is operating properly and adjusts

for any sensor drift or loss of sensitivity. The process involves passing

two known certified concentration of the target gas - one for Low/Zero

Point and other for High/Span Point - usually from a calibration gas

cylinder and allowing the Analyzer to adjust for drift in the reading.

What is cross-sensitivity?

Cross-sensitivity refers to the response of a sensor to a gas other than

the target gas (also called an interference gas).

What is Nox?

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A group of compounds mostly formed with Nitrogen and Oxygen as a

byproduct of combustion are called NOX - Nitric Oxide (NO), Nitrogen

Dioxide (NO2), Nitrous Oxide (N2O), N2O3, N2O4, N2O5, N3O4 and

NO3.

What does PPM mean?

Parts Per Million - 1 % volume = 10,000 ppm.