--- license: apache-2.0 --- **Description**: Snapshot measurements on 27 variables from a distillation column; measured over 2.5 years. **Data source**: From an industrial source; variable names have been coded. e.g. Temp1 is a temperature, but we cannot disclose where it is measured on the column. Temperatures are in Fahrenheit Pressures are measured in bars FlowC1 in units of MSCFD FlowC3 and FlowC4 are in units of MBPD Temp11 = Temp3 - Temp9 = the temperature increase of the stream leaving the column and returning back, after passing through the reboiler InvTemp tags are 1000/temperature, therefore with units of inverted Fahrenheit The last column, VapourPressure, is a quality variable measured in the laboratory. The other snapshot measurements in the row correspond to the process conditions when the sample was taken. **Data shape** 253 rows and 27 columns