D.C. Mun. Regs. tit. 25-B, § 1201
1201.1 Food temperature measuring devices shall not have sensors or stems constructed of glass, except that thermometers with glass sensors or stems that are encased in a shatterproof coating such as candy thermometers may be used.
SOURCE: Final Rulemaking published at 56 DCR 5245 (July 3, 2009).