System and method for measuring component concentration

A system for measuring component concentration in a sample, the system comprising:

• a container for containing the sample;
• a first light source positioned to emit light through the sample in the container;
• a first light sensor positioned to receive light from the first light source that has passed through the sample in the container;
• a second light source positioned to emit light through the sample in the container (230);
• a second light sensor positioned to receive light from the second light source that has passed through the sample in the container;
• and
• a control circuitry in communication with the first light sensor, the second light source and with the second light sensor, the control circuitry configured to:
• receive a light intensity measurement from the first light sensor;
• induce the second light source to emit light having light intensity equal to or proportional to the received light intensity;
• receive a light intensity from the second light sensor;
• and
• calculate a component concentration in the sample based on a difference in intensity from the light emitted from the first light source and the light received at the second light sensor.