YSI 556 Multiprobe Water Quality Meter M3duplicate and calibrated to work together

and calibrated to work together so you know you are getting accurate readings

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YSI 556 Multiprobe Water Quality Meter M3duplicate and calibrated to work togetherRugged and reliable, the YSI 556 MPS water quality analyzer (Multiprobe system) combines the versatility of an easy to use, easy to read handheld unit with all the functionality of a multi parameter system. Featuring an IP 67, impact resistant case, the YSI 556 MPS simultaneously measures dissolved oxygen, pH, conductivity, salinity, temperature, and ORP. This monitor is designed for water quality applications and mainly used in the environmental