The ESS (Extractive Sampling System) is typically used in industries where the measurement of dew point or moisture content in gases is critical for the process or product quality, and where the gas sample needs to be extracted from the process stream for analysis. Some of the industries that use this type of system include:

1. Natural Gas: The natural gas industry uses dew point measurement to prevent hydrate formation, which can cause blockages in pipelines and damage equipment. The ESS system allows for accurate measurement of dew point in a natural gas stream.

2. Petrochemical: The petrochemical industry uses dew point measurement to ensure that moisture does not contaminate the final product, which can affect product quality and safety. The ESS system allows for accurate measurement of dew point in a petrochemical process stream.

3. Semiconductor: The semiconductor industry uses dew point measurement to prevent moisture from damaging sensitive electronic components during the manufacturing process. The ESS system allows for accurate measurement of dew point in a semiconductor process stream.

4. Power Generation: The power generation industry uses dew point measurement to prevent corrosion and damage to equipment caused by moisture in flue gas. The ESS system allows for accurate measurement of dew point in a flue gas stream.

5. Pharmaceutical: The pharmaceutical industry uses dew point measurement to control the moisture content in the manufacturing process, which can affect the stability and shelf-life of the final product. The ESS system allows for accurate measurement of dew point in a pharmaceutical process stream.