Liquid level measurement in enclosed tanks under high-temperature and oily conditions

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A COOEC wastewater treatment plant project features enclosed oil separation tanks containing oil-water mixtures; in winter, low-pressure steam is introduced into these tanks to prevent the oil in the water from solidifying. But this results in the water surface temperature being very high, sometimes exceeding 100°C (with purely manual temperature control, no temperature regulation), and there is also a lot of water vapor and oil vapor above the water surface. In this case, if measuring the liquid level in a tank, can a high-temperature resistant radar level gauge meet the requirements? Additionally, there’s a question I’d like to ask everyone: at what thickness of sludge attached to the radar level gauge does it start to have a significant impact on the measurement accuracy? I hope everyone can give me lots of advice~~