Frequently Asked Questions
The questions below are designed to cover some of the more frequent questions asked.
For clarity we have divided the questions into the following sections:
If you have a question that we could answer for you, then please ask a question.
Hygrometry
What is Hygrometry?
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What happens at the dewpoint of air or other gases?
Dewpoint is defined as the temperature at which water vapour begins to condense onto a surface. It is, in fact, determined by the partial vapour pressure above the surface and the temperature of the surface. An explanation of dewpoint can be found by downloading the following technical bulletin:
Why does dewpoint change with pressure?
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What is relative humidity?
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Should I measure at line pressure or atmospheric pressure?
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Measurements with Tunable Diode Lasers
What is a Tunable Diode Laser (TDL)?
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Why is TDL technology a step forward?
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What compounds can be measured?
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Is it possible to measure more than one coumpound with SpectraSensors TDL?
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What are the sample cell restrictions for temperature & pressure?
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What are the limitations for using TDL based analysers for on-line applications?
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What is the expected life of the TDL laser?
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Is routine calibration really not needed?
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Is calibration ever needed?
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How do we avoid errors due to contamination?
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How hard is it to clean the mirror?
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Oil in Water Measurements
QUESTION 9
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QUESTION 10
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QUESTION 11
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QUESTION 12
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Water in Oil Measurements
QUESTION 14
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QUESTION 15
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QUESTION 16
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