OIML Recommendation R 133:2002

Liquid-in-glass thermometers

Scope: This Recommendation specifies the metrological and technical requirements for general-purpose, liquidin- glass thermometers intended for laboratory use as reference or working temperature standards. The thermometers are graduated in degrees Celsius and divided into six accuracy classes that apply to thermometers operating within the temperature range of –200 °C to +500 °C.