Packaged products

Provisions of the Measuring Instruments Act also concerns packed products, if the quantity of product is indicated on the label. Provisions relate to the way the quantity of product is indicated, the variation of the quantity of product of pre-packed products as well as measuring instruments used in determining the quantity of product.


Verified measuring instruments that comply with the Measuring Instruments Act shall be used in confirming the quantity of product.


The weight of the package must not be included in the weight of the product. In weighing the product, the weight of the package must either be subtracted from the total result or the weighing instrument must be tared before the product is weighed.


Units of measurement of the volume of content of the product

The amount of content of a pre-packaged product is indicated in units of weight, volume, length or area. The amount of content of a liquid product may be indicated in either units of weight or units of volume.


Units of measurement must be official units of the SI system. In pre-packaged products, it is also possible to use a double indication of the amount of content, in which case the amount of content may also be indicated in unofficial units. However, the font size of the unofficial unit of measurement must not be larger than that of official unit of measurement (Section 5 of Decision 179/2000 on Pre-Packaged Products).


The letter e on pre-packaged products

According to the Measuring Instruments Act, pre-packaged products are products packaged to a nominal amount when the purchaser is not present. It is not possible to change the amount of content of a pre-packaged product without opening or otherwise notably changing the package. Pre-packaged products include moisturiser tubes, cereal boxes and soft drinks bottles: all these have been packaged in a factory by the manufacturer, and the nominal amount of content is indicated on the label.


The manufacturer may apply for permission from an inspection body to use a small letter ℮ next to the indication of the amount of content. The letter indicates that the pre-packaged product meets the requirements of the Directive on Prepackaged Products and that an inspection body monitors the procedures that the manufacturer uses in confirming the amount of content.


Requirements concerning pre-packaged products:

-       The average actual amount of content of the package must not be below the nominal amount.

-       The maximum share of the pre-packaged products in which the negative error exceeds the ones set out in the Table must, in each batch, be small enough to meet

         the requirements of tests referred to in Annex II of the Directive on pre-packaged products.

-       Pre-packaged products with a negative error of more than twice the maximum permissible negative error TU1 set out in the Table are not allowed.


Table: Maximum permissible negative error of pre-packaged products

Nominal amount Qn in grams or millilitres

Permissible negative error TU1

% of Qn

grams or millilitres


5 - 50

50 - 100

100 - 200

200 - 300

300 - 500

500 - 1000

1000 - 5200 












The nominal quantity (nominal weight or nominal volume) must be in SI units. For pre-package, it is also permissible to use other units of measurement as a parallel indication, but in this case, the font size of the unofficial unit of measurement must not be larger than that of official unit of measurement.