In the United States environmental monitoring the turbidity standard unit is called Nephelometric Turbidity Units ( NTU ), while the international standard unit is called Formazin Nephelometric Unit ( FNU ).
2.
If the international standard units of grams, millimeters, and meters per second are substituted, the divisor can be changed from 7000 to 3500 to give approximately the same resulting TKOF.
3.
The unit symbol kb ( lowercase'b') is typographically similar to the international standard unit symbol for the kilobyte, i . e . kB ( upper case'B').
4.
In the United States environmental monitoring the turbidity standard unit is called Nephelometric Turbidity Units ( "'NTU "'), while the international standard unit is called Formazin Nephelometric Unit ( "'FNU "').