turbidity meter; nephelometer; turbidimeter
Technical instrument used to measure the cloudiness or haziness of a liquid, typically in water quality testing, environmental monitoring, or industrial processes.
In water quality testing, a turbidity meter is used to measure the cloudiness of the water.
Compound of 濁度 (turbidity) + 計 (meter, gauge). The exact historical derivation is uncertain; the spelling is conventionally associated with the meaning.