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H2S and LEL monitoring preferences

H2S and LEL monitoring preferences

(OP)
Hello,
I have been trying to establish a method for measuring/monitoring LEL and H2S in indoor facilities. I have heard numerous conflicting methods for doing this. We are using General Monitors for detection of LEL and H2S. We are dealing with Bakken Crude. Here's my questions.

LEL detection
1. What are the explosive gases I need to monitor?
2. Where should the sensor be placed (at floor or at wall plate)?
3. What gas should be used to calibrate the sensor?

thanks

RE: H2S and LEL monitoring preferences

Monitor the LEL of the gas with the lowest LEL of any gas that might be present in your crude.
The usual gases are lighter than air, so they reach LEL at the highest locations. Obviously you must put the sensor at the highest level where these gases can first collect enough to reach LEL.

you must get smarter than the software you're using.

RE: H2S and LEL monitoring preferences

The toxicity of H2S occurs at levels well below the LEL. You might want to monitor that separately.

you must get smarter than the software you're using.

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