The Chemical Metrology and Biometry Department is one of the seven metrology departments of the National Institute of Metrology (Thailand) (abbreviated as NIMT). The department is responsible for establishing and maintaining the national measurement standards for biometry, gas, inorganic and organic quantities through the Bio Analysis Group, the Gas Analysis Group, the Inorganic Analysis Group and the Organic Analysis Group, respectively. With regard to metrology in chemistry, the major activities of the groups in the area of reference materials are production and distribution of certified reference materials. TRM (Thailand Reference Material) is a certified reference material issued by the NIMT, and its designated institute. TRM with a roof shape logo is a registered trademark of NIMT with the Department of Intellectual Property, Thailand. Furthermore, the activities of the groups also include calibration/ measurement services, providing training courses and conducting research and development in the related areas.