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Whatever they have been designed to measure. Different sensors are designed to measure different things.

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13y ago

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What is smoke density?

measures how many (usually) parts per million (ppm) of whatever smoke/gas/etc is being looked for. For instance a smoke detector looks for X ppm of smoke in air, or a CO2 sensor measures the ppm of CO2 in air - ppm is a measure of density.


What is smoke density analyser?

measures how many (usually) parts per million (ppm) of whatever smoke/gas/etc is being looked for. For instance a smoke detector looks for X ppm of smoke in air, or a CO2 sensor measures the ppm of CO2 in air - ppm is a measure of density.


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The smoke detectors use the photoelectric effect or a sensor based on the ionization differences between smoke and air.


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A sensor in the transmission, measures the output shaft speed.


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It measures the speed of an item.


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Could be a diesel? If not then replace your oxygen sensor on your exhaust. A bad oxygen sensor causes the exhaust smoke to be dark in color.


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It measures the pressure of a fluid or gas.


How do a photoelectric smoke sensor work?

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