RelativeHumidity represents the amount of water vapor present in air expressed as a percentage of the amount needed for saturation at the given temperature.

Concentration represents the smallest measurable concentration in parts per quintillion.

Distance represents the smallest measurable distance as an int64 nanometer count.

MassConcentration represents the smallest measurable concentration of a ratio of masses in picograms per cubic meter.

Pressure represents the smallest measurable pressure in billionths of a Pascal.

Temperature represents the smallest measurable temperature in billionths of a degree Celsius.