"no units" is correct and usable in written English.
You can use it to refer to a lack of a specific unit of measurement, such as in the sentence "The product has no units of sugar."
"So far, no units have had excessive readings," it said.
Specific gravity is dimensionless (i.e., has no units).
Almost no units can operate without assistance from coalition forces.
Since it is a ratio, specific gravity has no units.
Specific heat is numerically equal to heat capacity but has no units.
It adds: "The magnitude of the nuclear threat is intangible: no units exist with which we can measure it.
However, some properties are so fully occupied, there are no units to offer to displaced persons, she said.
The σt has no units and is an abbreviated density of seawater controlled by salinity and temperature only.
Since no units there have been on the market recently, neither Mrs. Gillespie nor Mr. Coffenberg could accurately assess their value.
Both sides say that the current supply of blood is safe and that no units of contaminated or mislabeled blood have recently been released or have harmed patients.
The Afghan Defense Ministry denied that the bomber had been one of its soldiers, saying that it had no units in that area.
