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YSI Pro Series Meters
The easiest, most versatile handheld solution for spot sampling in the field or lab. Simply choose the Pro Series model, cable length, and probes that are right for your specific application – from aquaculture to surface water to wastewater and more.
- Each instrument provides multiple probe or cable options.
- Detachable cables and probes mean less downtime.
- Backlit keypad and display (Pro Plus) or glow-in-the-dark keypad for low light measurements.
- IP67 Rated
- 3-Year Warranty on Instrument
2-Year Warranty on Cables
1-Year Warranty on Probes
6-Month Warranty on Galvanic DO Probes
YSI ProQuatro
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YSI Pro1020pH, ORP, ORP/Redox, Polarographic or Galvanic DO sensors, and Temperature. YSI Pro1030pH, ORP/Redox, Conductivity, Specific Conductance, Salinity, Total Dissolved Solids (TDS), and Temperature. YSI Pro2030DO, Conductivity, Specific Conductance, Salinity, Total Dissolved Solids (TDS), Barometer and Temperature. Call 1.800.833.7958 YSI Professional Series Specifications |
YSI ProDSS The YSI ProDSS is a rugged single or multiparameter water quality instrument designed for use in applications that include surface water, groundwater, coastal, and agriculture. The ProDSS features optional user-replaceable digital smart sensors that are automatically recognized when connected to the instrument. The optional GPS function, a broad range of sensors, and varying cable options allow for complete customization of the ProDSS. Call 1.800.833.7958 YSI ProDSS Multiparameter Specifications |
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YSI Pro10pH or ORP/Redox, and Temperature. YSI Pro20DO and Temperature. YSI Pro30Conductivity, Specific Conductance, Salinity, Total Dissolved Solids (TDS), and Temperature. Call 1.800.833.7958 YSI Professional Series Specifications |
YSI ProSolo ODO/T & ODO/CTOptical Dissolved Oxygen Meters andProOBOD Probe 
The ProSolo DIGITAL water quality meter features an advanced optical dissolved oxygen (ODO) probe that can be combined with either a temperature (ODO/T) or conductivity (ODO/CT) sensor. The ProSOLO handheld meets the demands of field work with a large LCD graphic display, waterproof case and interchangeable military-spec cable connector. User-replaceable cables are available in lengths that range from 1 to 100 meters. 
The YSI ProOBOD probe is used with the YSI ProODO handheld optical dissolved oxygen instrument. The ProOBOD easily connects to the ProODO handheld and makes it convenient to conduct lab BOD's with a very compact footprint. Call 1.800.833.7958 YSI ProSolo ODO/T & ODO/CT Specifications |
YSI ProSwap Water Quality Meter
YSI ProSwap single parameter water quality instrument enables users to easily swap one digital smart sensor for another. ProSwap can transform into whatever you need, ranging from a purpose-built turbidity meter, high- accuracy optical DO meter, spot sample for pH or profile conductivity-temperature-depth instrument. ProSwap is even compatible with a range of ion specific electrodes (ISE) and Total Algae sensors. Call 1.800.833.7958 |
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YSI Pro20i Dissolved Oxygen/Temperature
Easy to use, rugged and reliable, the YSI Pro20i provides everything you need in a handheld instrument for the measurement of dissolved oxygen (DO). A true field instrument with IP-67 waterproof, rubber over molded case, military spec connectors and 1-meter drop tests ensure durability to provide years of sampling even in the harshest field conditions. Call 1.800.833.7958 |
Geotech Environmental Equipment, Inc.
2650 East 40th Avenue
Denver, CO 80205
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