Brief introduction: Taiwan's SUNTEX online dissolved oxygen monitor DC-5100, with an external size of 144 * 144, a microcomputer designed integrated outer box, transparent front cover design, and a large LCD display screen with waterproof, acid resistant and other functions. It is equipped with LED light signals indicating warning and cleaning action status for operation status and electrode diagnosis. The automatic temperature and pressure compensation, manual salinity compensation function combination keys enter the setting and calibration mode design to prevent erroneous changes. It provides electrode automatic cleaning device contact program setting output, which is widely used in sewage treatment waterfall gas monitoring, river section, lake water quality, aquaculture and other fields