Cal. Code Regs. tit. 3, § 1660.1
The hand refractometer shall be temperature compensating, read directly in Brix percentage scale, with divisions not more than 0.2 degrees, that can be read with accuracy to 0.1 degree, have a sharp demarcation line (shadow), and be without interference by color or an indistinct line, and sealed with acid-proof material on the face, where the juice is placed.
Note: Authority cited: Sections 407 and 41194, Food and Agricultural Code. Reference: Sections 41191 and 41192, Food and Agricultural Code.
1. Amendment filed 12-4-95; operative 1-3-96 (Register 95, No. 49).