Fluid sensing device and control system

A sensing system for sensing physical properties of a fluid, the system comprising:

• a laser engine comprising configured to emit spectrally tunable laser radiation through the fluid as the fluid flows through the sensing system;
• a laser detector configured to receive the laser radiation after the laser radiation has passed through the fluid and to generate corresponding laser-readings;
• one or more processors;
• computer memory storing computer-readable instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising:
• receiving, from the laser detector, laser-readings from the laser detector;
• identifying, from the laser-readings, spectral-data reflective of physical properties of the fluid as the fluid flows through the sensing system;
• and
• determining one or more fluid-measures for corresponding one or more constituents of the fluid using the spectral-data and reference-data defining one or more reference spectra for each possible constituent of the fluid.