YSI 1001 pH sensor for the Professional Plus instrument.

YSI 1002 ORP (redox)sensor for the Professional Plus instrument.

YSI 1003 pH/ORP (pH/redox) combination sensor for the Professional Plus instrument.

YSI 1004 ammonium, NH4+ sensor for the Professional Plus instrument.

YSI 1005 chloride sensor for the Professional Plus instrument.

YSI 1006 nitrate sensor for the Professional Plus instrument.

YSI 116 pH sensor for the pH10 pen-style instrument.

YSI 131133 pH sensor for the Model 60 and 63 instruments.

YSI conductivity cells with built-in temperature sensors.

YSI 5202 Galvanic sensor for the Professional Plus and Pro20 DO instruments.

YSI 5203 Polarographic sensor for the Professional Plus and Pro20 DO instruments.

YSI 559 Polarographic sensor for the 550A DO and 556 Multiparameter instruments.

Determine phytoplankton concentrations by detecting the fluorescence from chlorophyll in situ.

YSI replacement pH sensor for the pH10 pen-style instrument.

YSI replacement ORP sensor for the ORP15 pen-style instrument.

YSI replacement pH sensor for the pH10A pen-style instrument.

YSI replacement ORP sensor for the ORP15A pen-style instrument.

Detect accurate, in situ trace dye levels with the 6130 Rhodamine Sensor.

Measure in situ blue-green algae levels in salt- or fresh-water with YSI 6131 and 6132 optical blue-green algae sensors.

Collect accurate, in situ measurement of turbidity in fresh, brackish, and sea water.

Rugged and reliable optical dissolved oxygen sensor used with 6-Series water quality sondes.

Copper-alloy anti-fouling optical chlorophyll sensor used with 6-Series sondes.

Copper-alloy anti-fouling optical blue-green algae sensor used with 6-Series sondes.

Copper-alloy anti-fouling optical turbidity sensor used with 6-Series sondes.

Copper-alloy anti-fouling optical dissolved oxygen sensor used with 6-Series sondes.

Stable multi-probe measures conductivity and temperature levels and calculates salinity values. Thermistor readings are used to temperature-correct other parameter measurements.

Obtain unprecedented accuracy and reliability with the YSI 6562 Rapid Pulse™ Dissolved Oxygen Sensor.

Measure Nutrient Data with Nitrate, Ammonium, and Chloride with Ion Selective Electrodes

Simple, accurate pH measurement in sensors designed for minimal maintenance in sampling, profiling, and long-term monitoring applications.

Measure Photosynthetically Active Radiation levels via sensors integrated into a 6600 Sonde.

The ProBOD self-stirring BOD probes are designed to fit into standard U.S. style 300 mL BOD bottles with various funnels available for use with other tapers.

The ProOBOD® self-stirring optical BOD probes are designed to fit into standard 300 mL BOD bottles with an international version also available for use with other tapers.

Expand your water quality monitoring to include hydrocarbons, oil, or CDOM with the YSI Sensor Adapter and Turner Cyclops-7 submersible sensors. The YSI 202400 Sensor Adapter expands water quality monitoring to include third-party analog output sensors. In addition to monitoring for Temperature, Conductivity, pH, Dissolved Oxygen, Turbidity, Blue-Green Algae, and Chlorophyll, 6-Series sondes can measure hydrocarbons, oil in water, and other parameters from the Turner Cyclops-7® submersible sensor line.

YSI 100 field ready pH sensor for the pH100 pH meter.

YSI 1007 lab-grade pH sensor for the Professional Plus instrument.

YSI 1008 lab-grade ORP (Redox) sensor for the Professional Plus instrument.

YSI 1009 lab-grade pH/ORP (pH/Redox) sensor for the Professional Plus instrument.

YSI 110 lab-grade pH sensor for the pH100 pH meter.

YSI 111 double-junction piercing tipped pH sensor for the pH100 pH meter.

YSI 112 double-junction flat glass pH sensor for the pH100 pH meter.

YSI 115 lab-grade ORP (Redox) sensor for the pH100 pH meter.

YSI 130 temperature probe for the pH100 pH meter.

The 200-BOD is a self-stirring BOD probe designed to fit into standard 300 mL BOD bottles and used with the DO200 handheld DO instrument.

YSI 300 field conductivity, salinity, TDS (total dissolved solids) sensor and cable for the EC300 conductivity meter.

The ProODO cable's can be ordered in lengths of 1-, 4-, 10-, 20-, 30-, 40-, 50-, 60-, or 100-meters.  Cables come with the ODO optical DO sensor and sensing cap.  Cables over 1-meter also come with the 603062 cable management kit.

Rugged cables designed for field use with 6-series sondes.

The 60510 is a 1-port cable for use with the Professional Plus instrument. The port requires a ISE probe.

The 6051010 is a 2-port combo cable for use with the Professional Plus instrument. The 2-ports require ISE probes.

The 6051020 is a 2-port combo cable for use with the Professional Plus instrument. The 2-ports require a ISE and a DO probe.

The 6051030 is a 1-port combo cable for use with the Professional Plus instrument. The 1-port requires a ISE probe while the conductivity is built right into the cable.

The 60520 is a 1-port cable for use with the Professional Plus or Pro20 instrument. The port requires a DO probe.

The 6052030 is a 1-port combo cable for use with the Professional Plus instrument. The 1-port requires a DO probe while the conductivity is built right into the cable.

The 60530 cable allows for the measurement of conductivity, specific conductance, salinity, total dissolved solids and temperature.

The Quatro is a 4-port cable for use with the Professional Plus instrument. Create a powerful multiparameter sampling instrument.

YSI 6-series sonde to RS-232 adapter. Indoor-use only.

YSI 6-series field cable to RS-232 adapter.

MS-8 to pc serial port connector for 650MDS.

GPS Y-cable for 650MDS.

YSI 5775 standard stretch-style dissolved oxygen membranes.

YSI 5906 screw-on cap dissolved oxygen membranes.

YSI 5908 screw-on cap dissolved oxygen membranes.

YSI 5909 screw-on cap dissolved oxygen membranes.

YSI 5912 screw-on cap dissolved oxygen membranes for galvanic sensors.

YSI 5914 screw-on cap dissolved oxygen membranes for galvanic sensors.

YSI 5913 screw-on cap dissolved oxygen membranes for galvanic sensors.

Replacement membrane kit for 6150 ROX optical dissolved oxygen sensor (6-series sondes).

YSI OBOD replacement optical dissolved oxygen screw-on sensor cap for the BOD probe.

YSI ODO replacement optical dissolved oxygen screw-on sensor cap.

Reconditioning kit for 6562 Rapid Pulse dissolved oxygen electrodes.

Wiper pad kit for 6-series optical DO, BGA, turbidity, chlorophyll, and rhodamine probes.

Replacement wipers for 6-series 6025 Chlorophyll probe or 6130 Rhodamine WT probe.

Replacement wiper kit for the 6150 optical dissolved oxygen probe; 6131 and 6132 blue-green algae probes; or 6136 turbidity probe.

Replacement wiper kit (copper) for the 6150 optical dissolved oxygen probe; 6131 and 6132 blue-green algae probes; or 6136 turbidity probe. Use with firmware version 3.06 or higher.

Replacement wiper/brush for 6600EDS sonde.

YSI 3682 Zobell solution is used for calibrating ORP/Redox on several YSI instruments.

Various pH buffers for pH probe calibration.

Ammonium solutions to calibrate your field instruments equipped with ammonium ISE sensors.

NIST-traceable conductivity solutions to calibrate both field instruments and lab instruments and cells together for maximum
accuracy.

Nitrate solutions to calibrate your field instruments equipped with a nitrate sensor.

Reagent replacement packs for the 9300 and 9500 photometers.  Packs include reagents for 250 tests per pack unless noted differently.

Reagent starter kits for the 9300 and 9500 photometers.  Kits include reagents for 50 tests and instructions.

YSI turbidity solutions calibrate your instruments for maximum accuracy. Extremely accurate and stable solutions.

Extended length calibration cup assembly for 6600V2-2, 6600EDS V2-2, and 6600V2-4 sondes.

YSI 160 pH simulator for the pH100 instrument.

Never worry about the accuracy of your pH, ORP, or conductivity data again! Ensure probe performance with the 5580 Confidence Solution®.

Basic maintenance kit for all YSI 6-Series sondes except the 600R and 600QS.

Easily manage your cables. Also attaches to the back of the instrument to create a very compact system.

Easily attach any Pro Series, 556, or 650 instrument to your belt or other convenient location with this simple clip.

Rechargeable battery kit for 650MDS.

A zinc "sacrificial" anode minimizes corrosion damage to metallic parts of the sonde, namely its stainless steel connector.

Replacement weight for 600 sondes.

Replacement weight for 600 sondes.

Replacement weight for 600 sondes.

The 5978 cable weight attaches to the end of the probe guard. Ideal for longer cables to ensure you reach the depths you need.

3-pound weight for 6600 sonde.

Weight kit for 6820 or 6920 sondes.

The 690 cable weight attaches to the end of the probe guard. Ideal for longer cables to ensure you reach the depths you need.

The 691 cable weight attaches to the end of the probe guard. Ideal for longer cables to ensure you reach the depths you need.

C-Spray is a unique nanopolymer coating that inhibits biofouling attachment on the YSI 6560 Conductivity/Temperature Probe and other sensors and water quality instruments.

Copper tape for YSI water quality sondes and sensors provides biofouling protection and extends deployment lengths.

Copper-alloy port plugs protect unused sensor ports on YSI 6-Series sondes and provide anti-fouling protection.

Copper-mesh screens block organisms and provide biofouling protection for the 6560 Conductivity-Temperature probe and non-wiped pH probes.

Copper-alloy sonde guards protect water quality sensors and provide biofouling protection for YSI 6-Series Sondes.

Get Water Data with Bluetooth® Wireless Technology and Solar Power. The YSI Power and Communication System (PACS) supplies continuous power to submerged water instrumentation and enables wireless communication with the instrumentation.

Locking well cap for 2 or 4 inch wells.

The 170 electrode stand is ideal for a lab setting to hold the sensors during measurements.

This small 4654 tripod supports the instrument at a convenient viewing angle.

This small clamp supports the instrument at a convenient viewing angle. Ideal for attaching the instrument to the gunwale of a boat, table, or and surface with an edge to clamp to.

This dock is ideal in the laboratory, when connecting to Data Manager desktop software, or just storing the instrument for the next trip to the field.  Can be used with the instrument or instrument and Pro Comm II communications saddle.

User-replaceable parts for EcoMapper AUV.

Weatherproof box housing a rechargeable lithium ion power supply, modem, and Wi-Fi antenna.

Emergency Airbag Recovery System (safety tow float with pinger and cable).

Imagenex Side-Scan Sonar, 330kHz

Sonotronics Mantrack Manual Tracking Kit for emergency tracking of the EcoMapper AUV.

Standard flow cell. 203 mL. Easily disassembles for complete cleaning. Can be used with the Pro Series single or dual-parameter cables, 556, or 600XL and 600XLM instruments.

The 6601 flow cell simply screws onto the bottom of the calibration/transport cup of a 6600 sonde to turn it into a convenient flow cell.

YSI 6850 flow cell for the Pro Series Quatro cable.

The mounting spike simply attaches to the base of the 3059 or 3077 flow cell to stabilize the flow cell on the ground.

3/8 inch universal insert coupling for flow cell.

1/4 inch universal insert coupling for flow cells.

Universal body coupling for flow cells.

Digital FDO® optical dissolved oxygen sensors

Digital pH/ORP sensor for various SensoLyt® electrodes 

Digital conductivity sensor for TetraCon® electrodes

Digital TriOxmatic® electrochemical dissolved oxygen sensors

Digital ViSolid® total suspended solids sensor

Digital VisoTurb® turbidity sensor

Sensor adapter, or connection, cables for all IQ SensorNet probes to all IQ SensorNet terminals

Network connection cables for all IQ SensorNet modules to modules along the network

The MS/DIQ mounting plate