"JJF 1714-2018 Outline for Type Evaluation of Microdissolved Oxygen Meters" is suitable for evaluating the type of microdissolved oxygen meter with a range of (0~ 100) μg ● L-1 in film laminating electrode dissolved oxygen meters with classification code 46360500. This outline cites JJG 1060-2010 "Microdissolved Oxygen Meters" and GB/T 20245.4-2013 "Electrochemistry Analyzer performance representation, Part 4: Measurement of dissolved oxygen in water by film laminating current type Sensors" and other related standards. Microdissolved oxygen meters are widely used in power, electronics, energy and chemical industries for the measurement of dissolved oxygen content in process water. The instrument is usually composed of dissolved oxygen Sensors and electronic units, using Polarography and other principles for measurement to ensure the monitoring and control of process water quality.