SonTek CastAway® CTD

NEW! Now integrated with HYPACK®! [Learn more]  Designed for coastal profiling, the CastAway-CTD^® incorporates a 6-electrode conductivity cell, coupled with a fast response thermistor to provide highly accurate, high resolution CTD measurements to depths of 100m.

YSI ProDSS - Digital Sampling System

The YSI ProDSS (digital sampling system) handheld multiparameter meter provides extreme flexibility for the measurement of a variety of combinations for dissolved oxygen, turbidity, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH/ORP combination, ammonium (ammonia), nitrate, chloride and temperature along with depth.

MJK Expert™ Hydrostatic Level Series

MJK offers a full series of water level transmitters designed for immersion in open tanks, wet-wells, ground water and reservoirs. The water level transmitters are designed for measurement under rough conditions in all water and wastewater applications with large concentrations of sludge and suspended solids.

YSI Pro30 Conductivity, Salinity Meter

The Pro30 provides everything you need in a handheld meter that measures salinity, conductivity, specific conductance, total dissolved solids, and temperature. Rugged, simple and reliable.

YSI Pro10 pH / ORP Meter

The Pro10 provides everything you need in a handheld meter that measures temperature along with either pH or ORP (redox). Rugged, simple and reliable. Measure pH or ORP, and temperature.

YSI Pro1020

The Pro1020 provides everything you need in a handheld meter that measures dissolved oxygen and temperature along with either pH or ORP (redox). Rugged, simple and reliable. Measure pH or ORP, dissolved oxygen, and temperature.

YSI Pro2030

The ideal replacement for the discontinued YSI Model 85. The Pro2030 provides everything you need in a handheld dissolved oxygen meter that automatically compensates for changes in salinity values. Rugged, simple and reliable. Measure DO, salinity, conductivity, specific conductance, TDS, barometric pressure and temperature.

YSI EcoSense ODO200 Handheld - Optical Dissolved Oxygen Meter

Accurate, economical, handheld dissolved oxygen measurements using optical technology.

The EcoSense® line of compact, handheld instruments provides the most accurate data in the most affordable format. The instruments feature an easy-to-use interface, one-hand operation, IP67 waterproof case, and low cost of ownership over the life of the product.

YSI EcoSense DO200A Dissolved Oxygen Meter Kit

The DO200A is part of the EcoSense® family of products. The DO200A dissolved oxygen instrument offers fast dissolved oxygen response times in wastewater, surface water, and aquaculture applications.

YSI EXO1 Multiparameter Sonde

Capturing accurate data in fresh water, ground water and marine aquatic environments is easy with the versatile multiparameter EXO1 sonde. Ideal for estuarine, surface water or ground water applications.

YSI EXO2 Multiparameter Sonde

The EXO advanced water quality monitoring platform includes the versatile multiparameter EXO2 sonde for oceanographic, estuarine, or surface water applications. Collect data to 250m with the advanced EXO2 sonde – contains six replaceable 'smart' sensors and a central wiper to clean biofouling.

YSI EXO Conductivity & Temperature Smart Sensor

Note: This product is intended for sampling and profiling applications.
This sensor must be installed into an EXO Sonde to function (EXO1 | EXO2). Does not function on its own.

For long-term monitoring in fouling environments, please see our Wiped (C/T) sensor for the EXO2 platform.

YSI 3200 Conductivity Meter

The YSI 3200 is an innovative instrument that offers unmatched accuracy for ultrapure water analysis, multipoint calibration, and a high/low alarm for process applications.

Aanderaa SeaGuard® CTD

SeaGuard CTD Recorders may be used as a multi-parameter instrument in the sea and in freshwater and feature a modular plug-and-play architecture.

YSI 6952 Buoy - Vertical Profiling System

The YSI 6952 Buoy - Vertical Profiling System offers user-programmable sample intervals, redundant error recovery logic that detects unexpected activity and recovers automatically, and is compatible with all YSI EXO and 6-Series sondes equipped with depth.

YSI 6951 Pontoon - Vertical Profiling System

The YSI 6951 Pontoon Vertical Profiling System offers user-programmable sample intervals, redundant error recovery logic that detects unexpected activity and recovers automatically, and is compatible with all YSI EXO and 6-Series sondes equipped with depth.

YSI WaterLOG Bubbler / Pressure Sensor (H-3553T)

The Bubbler has an improved controller and pressure regulator that use a sophisticated system of sensors and valves to regulate the bubble rate and purge pressure. And to keep the sediment from settling around the orifice line, this Bubbler provides a purge feature to keep the pressure at a desired level. You can even start a manual purge, anytime, with the touch of a button. This system was made for those who don't have time to mess around at the site.

YSI WaterLOG Nile Water Level Radar Series

NEW Nile Series 502/504/517 models! Designed for non-contact water level measurement. The WaterLOG Nile Series (502/504/517) combines high accuracy with an out-of-the-box measurement range of up to 70 m. The rugged, innovative design was inspired for installation on a bridge or other structure over the water—making this series ideal for sites that may have ice or other instrument-damaging debris. Its reliable interface and simple SDI-12 communication ensure seamless integration with current water monitoring stations. With three models to choose from, the Nile Series is sure to meet your water monitoring needs.