Autonomous measurement system for performing chemical concentration measurements in an industrial process stream

A method performed by at least one processor of a sensor device, the method comprising:

• causing a supply of a reagent to a sample cavity of the sensor device, the sample cavity being positioned within an industrial process stream and comprising a fluid sample of the industrial process stream, the reagent combining with the fluid sample to form a mixed sample;
• causing a light source of the sensor device to illuminate the mixed sample of the sample cavity;
• obtaining, from an optical sensor of the sensor device, sensor data obtained by the optical sensor based at least in part on light received from the mixed sample in conjunction with the illumination of the mixed sample by the light source;
• correcting the sensor data for at least one attribute of the industrial process stream;
• and
• determining a concentration of a target analyte based on the corrected sensor data.

A method of fabricating a sensor device comprising:

• forming a sensor device comprising a housing and a sample cavity disposed distally of the housing, the housing comprising a light source and an optical sensor, the optical sensor being optically exposed to the sample cavity;
• determining a target analyte of an industrial process stream;
• selecting a filter based at least in part on the determined target analyte of the industrial process stream;
• and
• attaching the filter to the housing between the optical sensor and the sample cavity.