AMI 3010BX, Operator'S Manual, Page: 4 / 50

METHOD OF MEASUREMENT:
ELECTROCHEMICAL HYDROGEN SULFIDE SENSORS
The
MODEL 3010BX
utilizes an electrochemical sensor with a strong sensitivity to trace levels of
hydrogen sulfide. AMI offers customers two sensor options, based on the needs of their applications.
One option can measure trace hydrogen sulfide levels to as high as 200 ppm, while the other option
increases the measurement range to 2000 ppm.
The following table provides the effect on the H
2
S measurement shown on the Analyzer due to
cross-sensitivity of the listed gases, if the gas is present at a level of 100 ppm.
Common Gases Reading
Methyl Mercaptan 40 ppm
Hydrogen 1 ppm
Carbon monoxide 4 ppm
Uncommon Gases Reading
Nitric Oxide 2 ppm
Sulfur dioxide 18 ppm
Ethylene < 0.8 ppm
Ammonia or amines < 0.1 ppm
Carbonyl sulfide < 0.1 ppm
Carbon disulfide < 0.1 ppm
Chlorine -25 ppm
Nitrogen dioxide -30 ppm
While our sensors have a strong sensitivity to trace levels of H
2
S, they also have a cross-sensitivity to other
gases.
Hydrogen Sulfide Sensor Range(s)
Low Range 0 –10 ppm, 0 –50 ppm, 0 –100 ppm,
0 –200 ppm
High Range 0 –500 ppm, 0 –1000 ppm,
0 –2000 ppm,
Example: If the sample gas contains 20 ppm of H
2
S and also contains 100 ppm of hydrogen, the
reading for H2S on the Analyzer will be 21 ppm.
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