Spiral doser
A spiral doser is a device that distributes a pre-set volume of liquid over the surface of rotating agar plates. The dosing needle moves from the center of the plate to its outer edge along a trajectory known as an Archimedean spiral. The distributed volume decreases as the needle moves from the center toward the edge of the plate in such a way that there is an inverse proportional relationship between the dispensed volume and the radius of the spiral. The volume of the sample distributed on any specific segment is known and constant. A vacuum source is required for loading and dispensing liquids.
Source: "Food and Animal Feed Microbiology. General Requirements and Recommendations for Microbiological Investigations. GOST R ISO 7218-2008"
(approved by the order of Rosstandart dated 18.12.2008 No. 480-st)
Понятие «спиральный дозатор» мужского рода.
| Падеж | Единственное число | Множественное число |
|---|---|---|
| Р | спирального дозатора | спиральных дозаторов |
| Д | спиральному дозатору | спиральным дозаторам |
| В | спиральный дозатор | спиральные дозаторы |
| Т | спиральным дозатором | спиральными дозаторами |
| П | спиральном дозаторе | спиральных дозаторах |