Remote Water Quality Monitoring Systems

The new low-cost HOBO® MX2501 pH and Temperature logger is designed for long-term monitoring of pH in estuaries, lakes, streams, rivers, and oceans.

The HOBO U24 Conductivity Logger is a high-accuracy, cost-effective water quality data logger for measuring conductivity and temperature in streams, lakes, and other freshwater sources

The HOBO U24-002-C is a cost-effective data logger for measuring salinity, conductivity and temperature in saltwater environments with relatively small changes in salinity (±5,000 μS/cm) such as saltwater bays, or to detect salinity events such as upwelling, rainstorm, and discharge events.

The HOBO U26 Dissolved Oxygen Logger is a highly precise, low-cost data logger for measuring concentrations of oxygen in lakes, streams, rivers, estuaries, and coastal waters. Used by aquatic biologists, hydrologists, and other research professionals, the HOBO U26 combines the high accuracy, robust performance of industry-leading RDO® Basic (Rugged Dissolved Oxygen) sensor technology with an easy-to-maintain design.

The HOBO RX3000 is Onset’s next-generation remote data logging station that provides instant access to site-specific environmental data anywhere, anytime via the internet.

The pHionics STs Series™ pH sensor/transmitter provides highly accurate pH measurement from 0-14 pH. The electrode is glass with a silver/silver chloride reference wire and double junctions to ensure long-term stability in harsh chemical solutions.

The STs Series Dissolved Oxygen combines a dissolved oxygen and temperature sensor along with a 4-20 mA transmitter into one durable, compact device.

The STs ORP (redox) provides ORP (redox) and temperature outputs with a 2-wire, 4-20 mA transmitter in a single, compact device.

The model 1500 EC sensor is designed for measuring electrical conductivity (salinity) of liquids at remote locations.

pHionics has combined a conductivity and temperature sensor with a 4-20 mA transmitter into a single, compact device that provides exceptional durability and accuracy.