BS EN ISO 7519 specifies requirements and test methods for clinical thermometers for direct measurement of body temperature (glass thermometers with maximum thermometer, non-mercury filling) and related performance characteristics. It’s a harmonized European adoption of the ISO standard, with “BS” indicating the British Standard and “EN” indicating adoption across the EU/EEA. The standard defines accuracy classes, response time, scale markings, construction, packaging and instructions, and required laboratory tests.
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