Horiba U-50 Series: 11 Parameters. One Field Probe.

At the heart of the U-50 Series is its multi-sensor probe, which consolidates multiple electrodes and sensors into a single unit approximately 96 mm in diameter and 340 mm in length. All 11 parameters (pH, pH (mV), ORP, Dissolved Oxygen, Conductivity, Salinity, TDSS, Seawater Specific Gravity, Temperature, Turbidity, and Water Depth) are displayed simultaneously on the backlit LCD control unit — no cycling through screens, no separate readings.

This breadth of measurement is not simply a matter of convenience. For environmental professionals working under EPA licence conditions in Ireland, being able to confirm pH, dissolved oxygen and turbidity simultaneously at a discharge point — rather than conducting three separate measurements — reduces sampling time, eliminates the risk of inconsistent readings taken at different moments, and produces a cleaner audit record.

The U-50 Series is designed for the broad range of field conditions encountered across environmental monitoring programmes in Ireland. Its combination of parameter breadth, field durability, and deployment flexibility makes it suitable for the following applications.

• River & stream quality surveys – Multi-parameter profiling at river survey stations for Water Framework Directive reporting, ecological status classification, and point-source impact assessment under EPA water quality plans.
• Groundwater monitoring – Borehole and monitoring well deployment using the 10 m or 30 m cable to measure pH, DO, conductivity, ORP and temperature at depth — essential for contaminated land investigations and aquifer characterisation.
• Industrial discharge compliance – Simultaneous measurement of discharge water quality parameters at point-source outlets, supporting EPA industrial wastewater licence compliance monitoring and self-monitoring programmes.
• Catchment & estuary surveys – GPS-enabled U-52G and U-53G models allow GIS-tagged water quality data collection across entire catchments or estuaries, ideal for nutrient load assessment and tidal influence mapping.
• Drainage & runoff monitoring – Turbidity, conductivity and DO monitoring in drainage ditches, surface runoff channels and agricultural drains — relevant to nitrates action programme compliance monitoring.
• Water treatment intake monitoring – Real-time source water quality characterisation at river abstraction and reservoir intake points — supporting drinking water treatment process optimisation and source protection.

Interested in the HORIBA U-50 Series?