露點(diǎn)的兩個(gè)重要特征:

1. Dewpoint is not temperature dependent parameter 露點(diǎn)溫度與氣體溫度無關(guān)

• the measurement is not changed if the gas temperature change 如果氣體溫度變化，露點(diǎn)溫度不變

– process gas can be cooled before measurement 流程氣體通常在測(cè)量前冷卻

2. Dewpoint is pressure dependent parameter 露點(diǎn)溫度是與壓力相關(guān)的參數(shù)

• when pressure increases also dewpoint value increases 壓力升高時(shí)露點(diǎn)升高

– in pressurized systems Vaisala recommends to measure in gas pressure, not in ambient pressure 對(duì)于帶壓環(huán)境，建議帶壓測(cè)量露點(diǎn)，不建議采樣常壓測(cè)量。