YSI ORP or Redox

ORP is typically measured to determine the oxidizing or reducing potential of a water sample. It indicates possible contamination, especially by industrial wastewater. ORP can be valuable if the user knows that one component of the sample is primarily responsible for the observed value. For example, excess chlorine in wastewater effluent will result in a large positive ORP value and the presence of hydrogen sulfide will result in a large negative ORP value.

YSI 6-Series combination pH / ORP sensor.

YSI EcoSense ORP15 Pen replacement electrode.

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ORP is determined by measuring a the potential of a chemically-inert (platinum) electrode which is immersed in the solution. The sensing electrode potential is read relative to the reference electrode of the pH probe and the value is presented in millivolts.

		6600V2 Make the most of your environmental monitoring. The 6600 V2 sonde is the most comprehensive water quality monitoring equipment available with simultaneous measurement of conductivity (salinity), temperature, depth or level, pH/ORP.

		6600EDS Extended Deployment for Harsh Environments The 6600EDS multiparameter sonde accurately measures 10 parameters in severe fouling environments for extended periods. The sonde has two optical ports, conductivity/temperature port, Rapid Pulse DO port, and pH/ORP port. The 6600EDS also offers an extended brush that cleans the pH/ORP and Rapid Pulse DO sensors.

		6920 V2 Compact Sonde for Unattended Monitoring The YSI 6920 V2 sonde is an economical logging system, ideal for long-term in situ monitoring and profiling. Two versions: 6920 V2-1 has one optical port, conductivity/temperature port, Rapid Pulse Dissolved Oxygen port, pH/ORP port, and 3 ISE ports 6920 V2-2 has 2 optical ports, conductivity/temperature port, pH port, and one ISE port.

		6820 V2 Compact Sonde for Field Sampling The YSI 6820 V2 is a cost-effective sonde for profiling and spot-checking in rivers, lakes, wetlands, wells, estuaries, and coastal waters. Two versions are available: 6820 V2-1 has one optical port, conductivity/temperature port, Rapid Pulse DO port, pH/ORP port, and 3 ISE ports 6820 V2-2 has 2 optical ports, conductivity/temperature port, pH port, and one ISE port.

		600XL V2 and 600XLM V2 Small Packages - Economical Sampling or Logging Both the YSI 600XL V2 (sampling) and the YSI 600XLM V2 (logging) offer economical solutions in small packages for surface water and ground water applications. Both models easily fit into 2-inch wells and measure a range of fundamental parameters, including oxygen - with the YSI ROX™ optical dissolved oxygen sensor - and level, using a highly-accurate vented sensor.

		600QS The Quick Solution to Handheld Sampling Combined for convenience, the YSI 650 MDS display-datalogger and the YSI 600R sonde allow you to collect 11 parameters simultaneously in real time.

		600R Water Quality Sampling Sonde The YSI 600R provides water quality sampling in a small package for surface water and ground water applications. With a diameter of less than two inches (4.2 cm), the 600R easily fits into wells.

		6920DW Monitor Drinking Water in Distribution System The YSI 6920DW is a portable instrument which measures free chlorine, turbidity, and other parameters. Take readings at multiple points along a drinking water distribution system; the collected data gives you a comprehensive view of your water quality and can help you detect events of concern.

		600DW Sidestream measurements for distribution systems The YSI 600DW is a portable instrument which measures free chlorine and other parameters. Take readings at multiple points along a drinking water distribution system; the collected data gives you a comprehensive view of your water quality and can help you detect events of concern.

		5200A Multiparameter Monitoring and Control Instrument Designed specifically for Aquaculture Systems, the YSI 5200 and AquaManager™ Software integrate process control, alarming, and data management into one product. Simple enough to monitor one tank, powerful enough to manage a full scale farming operation from anywhere in the world. Simultaneously measure dissolved oxygen, pH, conductivity, ORP, salinity and temperature.

		Professional Plus Handheld Multiparameter Instrument The YSI Professional Plus handheld multiparameter meter provides extreme flexibility for the measurement of a variety of combinations for dissolved oxygen, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH/ORP combination, ammonium (ammonia), nitrate, chloride and temperature. Also a very powerful lab instrument for BODs, pH and ORP.

		Vertical Profilers For watersheds, source water and reservoir monitoring, YSI Vertical Profiling Systems provide automated data collection and telemetry throughout a water column. These water quality profilers are available in 3 different deployment configurations, each featuring: Rugged, non-corrosive winch and drive mechanism Software for easy set-up, deployment, water quality analysis and export User-selectable sample intervals