業內、研究以及教學科學家與化學工程師仍在測量相變平衡，儘管理論估計上已有了重大的改進。

因此，FISCHER^®相變平衡儀器是化學工程實驗室裡標準設備中的一個重要部分。

二元及多成分混合物的水蒸氣-液體平衡構成了評估分離過程中所需要進行的理論板塊測定的重要基礎。雖然VLE資料可從文獻中得知，通過實驗重新測定平衡資料的趨勢仍在增加，因為所用的熱力學參數如壓力、溫度及濃度等都不同或不足。

尤其是相變平衡的溫度與壓力依賴性的理論性額外評估，平日實踐中常常都不足夠，因此，過壓範圍內對VLE資料的實驗性測定的要求也有所增加。

i-Fischer Engineering GmbH也修改了數十年以來在世界著名的FISCHER^®品牌下出售、適合過壓範圍高達50巴的VLE設備。

VLE設備的設計可供5毫升的裝樣量（動態模式），並且可在真空（1...1,013毫巴）、大氣和過壓（1...50巴）條件，以及高達180°C的溫度下操作。

  Scientists and chemical engineers in industry, research and teaching still measure phase equilibria despite the significant improvement in theoretical evaluations.

For that reason, the FISCHER® - phase equilibrium apparatus is part of the standard equipment in chemical engineering laboratories.

The vapour-liquid equilibrium of binary and multi-component mixtures constitute an essential basis for the determination of the theoretical plates necessary for the evaluation of separation processes. Although VLE-data are known from literature, there is still an increasing tendency towards re-deter-mining equilibrium data by experiments, because the thermodynamic para-meters like pressure, temperature and concentrations are different or inadequate.

Especially the theoretically additional evaluation of the temperature and pressure dependence of phase equilibrium is insufficient very often in daily practice, thus the experimental determination of VLE-data is increasingly requested in the overpressure range, too.

i-Fischer Engineering GmbH modified the VLE-equipment, since decades sold under the world-known FISCHER®-brand, suitable for the overpressure range (up to 50 bar).

The VLE-equipment is designed for a charge of 50 ml (dynamic mode) and can be operated under vacuum (1...1,013 mbar), atm-condition and overpressure (1...50 bar) as well as temperature up to 180°C.