An optical measurement system for a Coriolis mass flow meter, comprising: a first light source configured to emit a first light beam; a first optical sensor configured to output first measurements based on detecting the first light beam; a second light source configured to emit a second light beam; a second optical sensor configured to output second measurements based on detecting the second light beam, wherein the first measurements and the second measurements comprise variable components; characterized in that the system further comprises: a third optical sensor configured to output third measurements based on detecting the second light beam or a third light beam, wherein the third measurements comprise a first steady state component; and a compensation circuit configured to control a first light output of the first light beam and a second light output of the second light beam by controlling one or more currents to the first light source and the second light source based on the first steady state component of the third measurements, wherein the optical measurement system further comprises a fourth optical sensor configured to output fourth measurements based on detecting the first light beam or a fourth light beam, wherein the fourth measurements comprise a second steady state component, wherein the compensation circuit comprises a filter circuit configured to filter the first and second steady state components, and to control the one or more currents to the first light source and the second light source based on the filtered first and second steady state components. a first light source configured to emit a first light beam; a first optical sensor configured to output first measurements based on detecting the first light beam; a second light source configured to emit a second light beam; a second optical sensor configured to output second measurements based on detecting the second light beam, wherein the first measurements and the second measurements comprise variable components; characterized in that the system further comprises: a third optical sensor configured to output third measurements based on detecting the second light beam or a third light beam, wherein the third measurements comprise a first steady state component; and a compensation circuit configured to control a first light output of the first light beam and a second light output of the second light beam by controlling one or more currents to the first light source and the second light source based on the first steady state component of the third measurements, wherein the optical measurement system further comprises a fourth optical sensor configured to output fourth measurements based on detecting the first light beam or a fourth light beam, wherein the fourth measurements comprise a second steady state component, wherein the compensation circuit comprises a filter circuit configured to filter the first and second steady state components, and to control the one or more currents to the first light source and the second light source based on the filtered first and second steady state components. a third optical sensor configured to output third measurements based on detecting the second light beam or a third light beam, wherein the third measurements comprise a first steady state component; and a compensation circuit configured to control a first light output of the first light beam and a second light output of the second light beam by controlling one or more currents to the first light source and the second light source based on the first steady state component of the third measurements, wherein the optical measurement system further comprises a fourth optical sensor configured to output fourth measurements based on detecting the first light beam or a fourth light beam, wherein the fourth measurements comprise a second steady state component, wherein the compensation circuit comprises a filter circuit configured to filter the first and second steady state components, and to control the one or more currents to the first light source and the second light source based on the filtered first and second steady state components.