nephelometer
/ˌnɛfəˈlɒmɪtər/
noun
- An instrument that measures the amount of particles suspended in a liquid or gas by shining a light through it and detecting how much light is scattered.
- The scientist used a nephelometer to check the cloudiness of the water sample.
- In the lab, the nephelometer showed that the liquid had become much murkier after the experiment.
- Air quality monitors often include a nephelometer to measure dust and smoke particles.