Division 3.3
United Kingdom
A water-circulation system, enabling the prisms of the refractometer (3.1 or 3.2) to be kept at a constant temperature (varying by no more than 0,5 °C) of about 20 °C, which is the reference temperature (see 5.1).
United Kingdom
A water-circulation system, enabling the prisms of the refractometer (3.1 or 3.2) to be kept at a constant temperature (varying by no more than 0,5 °C) of about 20 °C, which is the reference temperature (see 5.1).