The HORIBA U-53 is a field-portable multiparameter water quality meter built around a tungsten-lamp turbidity sensor, delivering ten simultaneous measurements from one submersible probe.

The difference between the U-53 and the U-52 is the turbidity light source. The U-53 uses a tungsten lamp rather than an LED — the configuration specified by turbidity methods that call for a white-light incandescent source. If your sampling program or discharge permit references tungsten-lamp turbidity, this is the model to specify. An automatic wiper keeps the optical window clean during extended deployments, and the integrated depth sensor records the exact depth of every reading for true water-column profiling.

Measured parameters

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

Cable lengths

• 2 m cable (part no. 3200164506) — surface water, flow cells, beaker readings
• 10 m cable (part no. 3200164507) — typical shallow monitoring wells
• 30 m cable (part no. 3200164508) — deep wells, reservoirs, full water-column profiling

Choose the length to match your deepest measuring point.

Applications

• Turbidity compliance monitoring where a tungsten-lamp source is specified
• Stormwater and construction site discharge monitoring
• Lake, reservoir and estuary vertical profiling using the depth channel
• Groundwater monitoring well sampling and low-flow purge stabilization
• River, stream and watershed water quality surveys
• Municipal and industrial wastewater and effluent characterization
• Coastal and brackish water monitoring using the seawater and salinity channels
• Dredging and sediment plume monitoring

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, the #7801 U-53 turbidity cell, 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.