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Handheld field
instruments for environmental monitoring
The new YSI Handheld Instruments feature an IP-67,
impact-resistant case. They have field-replaceable probes. The dissolved oxygen
probe has easy-to-use, screw-on cap membranes.
YSI 556 Multiprobe System - Versatile, easy-to-use handheld unit with all the functionality of a multiparameter system!

NEW! YSI 550A Dissolved Oxygen Instrument - Rugged, waterproof, and field-ready!

The YSI Handheld EcoSense Instruments below have rugged cases, push-button calibration, and easy one-handed operation. The instruments are water-resistant to IP-65 standards and are inexspensive solutions for single parameter sampling.
NEW! YSI DO200 - Handheld, affordable, accurate dissolved oxygen sensor with temperature

NEW! YSI pH100 - Handhled, reliable, pH or mV with temperature

NEW! YSI EC300 - Handheld, super-stable four-electrode conductivity, salinity, TDS, specific conductance with temperature

The YSI Handheld Instruments below have rugged cases, push-button calibration, and built-in probe storage chambers. The instruments are water-resistant to IP-65 standards and are battery-operated. All of the Handheld instruments (except the YSI 55, DO200 and 550A) have memory that holds 50 readings.
YSI 55 Dissolved Oxygen Instrument

YSI 85 Dissolved Oxygen & Conductivity Instrument

YSI 30 Salinity/Conductivity/Temperature Instrument

YSI 60 pH Meter

YSI 63 pH Salinity/Conductivity/Temperature Instrument

YSI Choice 9000 Series Portable Precision Instruments

YSI Dissolved Oxygen Accessories
YSI Conductivity Solutions
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