The HORIBA U-52G measures eleven water quality parameters simultaneously and geotags every reading with built-in GPS. pH, ORP, dissolved oxygen, conductivity, salinity, TDS, seawater specific gravity, temperature, LED turbidity and water depth all come from one submersible probe, with latitude and longitude recorded automatically alongside the data.

GPS is what separates the U-52G from the standard U-52. Every stored measurement carries its own coordinates, so sampling points are documented without a separate handheld GPS or hand-written notes — ideal for transect work, watershed surveys, and any program where readings must be tied to a verifiable location. The integrated depth sensor records the exact depth of each reading, enabling true vertical profiling of a water column.

Measured parameters

• pH
• ORP (redox potential)
• Dissolved oxygen (DO)
• Electrical conductivity
• Salinity
• Total dissolved solids (TDS)
• Seawater specific gravity
• Temperature
• Turbidity (LED light source)
• Water depth
• GPS position

Cable lengths

• 2 m cable (part no. 3200156563) — surface water, flow cells, beaker readings
• 10 m cable (part no. 3200164499) — typical shallow monitoring wells
• 30 m cable (part no. 3200164500) — deep wells, reservoirs, full water-column profiling

Choose the length to match your deepest measuring point.

Applications

• Watershed and river basin surveys where each sample point needs GPS coordinates
• Lake, reservoir and estuary vertical profiling using the depth channel
• Groundwater monitoring well sampling and low-flow purge stabilization
• Coastal and brackish water monitoring using the seawater and salinity channels
• Stormwater and turbidity compliance monitoring at construction and discharge sites
• Municipal and industrial wastewater and effluent characterization
• Environmental site characterization, mapping and long-term trend monitoring
• Aquaculture and fisheries habitat assessment

Documentation

• U-50 Series specifications (PDF)
• U-50 Series instruction manual (PDF)
• U-50PC software instruction manual (PDF)
• U-50FC flow cell instruction manual (PDF)

Parts & accessories

Replacement pH, ORP and DO sensors, turbidity cells, reference electrode tips, DO membrane caps, wiper rubbers, probe guards, O-ring sets, carrying cases, flow cells and calibration solutions are all stocked — see the Horiba Parts & Accessories collection.

Browse all HORIBA instruments.