YSI is your one-stop source for environmental water quality monitoring instrumentation, offering single and multiparameter instruments, integrated systems, and accessories for most unattended monitoring, water quality sampling, profiling and logging applications. read more

YSI instruments are used in numerous applications worldwide including surface water, oceans / coastal, wastewater, storm water, food and beverage, aquaculture, source water and drinking water, ground water, laboratory, and desalination.

YSI is dedicated to providing quality data to customers and to preserving the planet's natural environment.

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Conductivity / Resistivity / Salinity / TDS Meters ()
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YSI Professional Plus Multiparameter Meter
The toughest, smartest and most versatile water quality meter available
$1,260.00
$1,197.00
In Stock
YSI Pro20 Dissolved Oxygen Meter
Rugged, reliable DO meter that is easy to operate while featuring user-replaceable sensors and cables
$570.00
$541.50
In Stock
YSI ProDSS Multiparameter Meter
Portable digital sampling for the measurement of up to 17 water quality parameters, probe sold separately
$1,650.00
YSI EcoSense ODO200M Dissolved Oxygen Meter
Handheld, dissolved oxygen % and mg/L (optical) temperature, automatic temperature compensation
$440.00
YSI EcoSense DO200M Dissolved Oxygen / Temperature Meter
Accurate, economical, handheld measurements, IP67 waterproof housing, 250 data sets
$365.00
$346.75
YSI ProODO Dissolved Oxygen Meter
Handheld, luminescent based dissolved oxygen meter for any field application
$755.00
$717.25
In Stock
YSI 9300 & 9500 Photometer
Economical photometers allow for field readings of 100+ parameters
$1,120.00
$1,064.00
YSI Pro2030 Dissolved Oxygen & Conductivity Meter
Measures dissolved oxygen, salinity, conductivity, specific conductance, TDS, barometric pressure and temperature
$775.00
$736.25
YSI EcoSense DO200A Dissolved Oxygen / Temperature Meter
Accurate, economical, handheld measurements, IP67 waterproof housing
$290.00
$275.50
YSI Pro20i Dissolved Oxygen Meter
Portable, easy to use and reliable measurement of DO, IP67 waterproof, one touch calibration
$850.00
YSI EcoSense pH100M pH/ORP Meter
Accurate, economical, handheld, IP67 waterproof housing, 250 data sets
$330.00
$313.50
YSI EcoSense pH100A pH/ORP Meter
Accurate, economical, handheld, IP67 waterproof housing
$270.00
$256.50
In Stock
YSI 3100/3200 Conductivity Meters
High accuracy, ±0.1%, conductivity measurement instruments
$1,005.00
$954.75
YSI MultiLab 4010-1W Water Quality Instrument
Single channel input with wireless capability for pH, ORP, optical-Based DO/BOD, or conductivity
$1,095.00
YSI EcoSense EC300A Conductivity Meter
Accurate, economical, handheld measurements, IP67 waterproof housing
$305.00
$289.75
YSI pH1200 pH/mV Meter
Simple, accurate laboratory-grade pH, mV and temperature measurements
$565.00
$536.75
YSI pHotoFlex Colorimeter
Portable Colorimeters for lab and field, calibration adjustment for selected methods, multiparameters
$1,010.00
YSI Pro1030 Multiparameter Meter
Tough, smart and versatile pH/ORP/Conductivity/Salinity/TDS/Temperature meter designed for rugged field work
$780.00
$741.00
YSI Pro10 pH / ORP Meter
Portable, user replaceable sensors and cables, 50 data set memory, IP67 protection
$505.00
YSI Pro30 Conductivity Meter
Handheld field meter for conductivity, salinity, TDS and temperature
$595.00
$565.25
YSI TruLab pH/ISE 1320 Laboratory Benchtop Meter
Dual channel meter for dual measurement of pH, mV (ORP) or ISE, AutoRead function improves repeatability
$1,595.00
YSI EcoSense pH10 pH Tester
pH and temperature measurement in a pen-style tester with graphic display
$116.00
$110.20
YSI 5000 Series Dissolved Oxygen Meters
Highly accurate, reliable advanced instrumentation for measuring dissolved oxygen
$1,450.00
$1,377.50
YSI EcoSense ODO200 Dissolved Oxygen Meter
Handheld, dissolved oxygen % and mg/L (optical) temperature, automatic temperature compensation
$345.00
YSI 900 Chlorine Colorimeter
Single parameter colorimeter for total and free chlorine, ideal for laboratory and field testing
$400.00
YSI Pro1020 pH / ORP & DO Meter
Handheld meter that measures dissolved oxygen and temperature along with either pH or ORP (redox)
$775.00
$736.25
YSI EcoSense ORP15 ORP Tester
ORP and temperature measurement in a pen-style tester with graphic display
$167.00
$158.65
YSI EcoSense EC300M Conductivity Meter
Accurate, economical, handheld measurements, IP67 waterproof housing
$390.00
$370.50
YSI 910 COD Colorimeter
Single parameter colorimeter for COD, rugged, waterproof, multi range ideal for laboratory and field testing
$580.00
YSI 1201 pH/mV Electrode
pH/mV electrode with BNC connector and 1-meter cable
$58.00
$55.10
YSI MultiLab 4010-2W Water Quality Instrument
Two-channel input with wireless capability for pH, ORP, DO/BOD, and conductivity, and built-in OUR/SOUR calculations
$1,490.00
YSI ProSolo Dissolved Oxygen Meter
Handheld, optical DO field meter ideal for applications including aquaculture, coastal, estuary, and wetland sampling
$850.00
YSI EcoSense EC30A Conductivity Pen
Measures conductivity, TDS, Temperature, IP67 waterproof housing, automatic temperature compensation
$147.00
YSI EcoSense pH1000A Benchtop pH Meter
Measures pH, ORP & temperature with automatic buffer recognition for reliable calibrations
$250.00
YSI MultiLab 4010-3W Water Quality Instrument
Three-channel input with wireless capability for pH, ORP, DO/BOD, and conductivity, and built-in OUR/SOUR calculations
$1,920.00
YSI 626664 ProSolo ODO/T Kit
Includes ProSolo dissolved oxygen meter, ODO/T probe assembly with 10-meter cable, and soft-sided carrying case
$1,550.00
YSI 626660 ProSolo ODO/CT Kit
Includes ProSolo dissolved oxygen meter, ODO/CT probe assembly with 4-meter cable, and soft-sided carrying case
$1,600.00
YSI 626663 ProSolo ODO/T Kit
Includes ProSolo dissolved oxygen meter, ODO/T probe assembly with 4-meter cable, and soft-sided carrying case
$1,500.00
YSI 626661 ProSolo ODO/CT Kit
Includes ProSolo dissolved oxygen meter, ODO/CT probe assembly with 10-meter cable, and soft-sided carrying case
$1,650.00
YSI 625120 BOD Analyst Pro Software
Easy, efficient and accurate desktop software for the calculation of BODs
$595.00
$565.25
YSI Calibration Solutions and Standards
Full range of calibration solutions and standards for YSI analytical meters
$33.00
In Stock
YSI EcoSense DO200 Dissolved Oxygen Probes
Probe and cable assemblies for YSI EcoSense DO200 dissolved oxygen meter
$310.00
$294.50
YSI ProDSS Smart Sensors
Smart sensors for use with the YSI ProDSS multiparameter meter
$450.00
YSI 5908 Dissolved Oxygen Cap Membrane Kit
Bottle of electrolyte, sanding disc, and 6 yellow, screw-on cap, 1.25mL PE membranes for Polarographic
$60.00
$57.00
YSI 1001 pH Sensor
pH sensor for YSI Pro Series analytical instruments
$175.00
$166.25
In Stock
YSI 5560 Conductivity/Temperature Probe
Combination temperature and conductivity sensor for YSI Pro Series analytical instruments
$435.00
$413.25
YSI EcoSense pH100 pH Probes
Probes and electrodes for use with the YSI pH100 meter
$55.00
$52.25
YSI 20 Pro Series DO Cable
1-port cable for use with the Professional Plus instrument. The port requires a DO probe.
$250.00
$237.50
In Stock
YSI 2002 Galvanic DO Sensor
Galvanic dissolved oxygen sensor for YSI Pro Series analytical instruments
$185.00
$175.75
In Stock
YSI 559 Replacement DO Sensor Module
Replacement DO sensor module for YSI 550A and 556 dissolved oxygen meters
$200.00
$190.00
YSI 5906 Dissolved Oxygen Cap Membrane Kit
Six-pack of 1 mil Teflon membranes with black caps
$60.00
$57.00
In Stock
YSI 1004 Ammonium, NH4+ Sensor
Ammonium, NH4+ sensor for YSI Pro Series analytical instruments
$365.00
$346.75
YSI 30 Pro Series Conductivity Cable
Allows for the measurement of conductivity, specific conductance, salinity, total dissolved solids and temperature
$330.00
$313.50
YSI ProODO Sensor Cap
Replacement ODO sensor cap kit for the YSI ProODO dissolved oxygen meter
$105.00
YSI 3232 Adapter Cell
YSI 3232 Adapter Cell
$200.00
$190.00
YSI 5790 Pro Series Quatro Cable
4-port cable for use with the YSI Professional Plus meter to create a powerful multi-parameter sampling instrument
$1,375.00
$1,306.25
In Stock
YSI ProODO Cable and Probe
ProODO cable and probe includes ODO optical DO sensor and sensing cap
$680.00
$646.00
In Stock
YSI ProBOD Probe
Self-stirring BOD probes designed to fit into standard U.S. style 300 mL BOD bottles
$725.00
YSI ODO/CT Probe and Cable Assembly
Features integral optical dissolved oxygen, conductivity, and temperature sensors and is available in lengths up to 100 meters
$840.00
YSI 063507 Tripod
Tripod, Ideal in the lab or any other level surface
$30.00
YSI 2003 Polarographic DO Sensor
Polarographic dissolved oxygen sensor for YSI Pro Series analytical instruments
$185.00
$175.75
In Stock
YSI 400403 TruLine Cyanide Electrode Kit
Includes ISE with refillable reference, fill solution, and ISA
$790.00
YSI 400365 TruLine Ammonia Electrode Kit
Includes ISE, 2 membrane modules, fill solution, ISA, and high standard
$575.00
YSI 1006 Nitrate Sensor
Nitrate sensor for YSI Pro Series analytical instruments
$365.00
$346.75
YSI 2030 Pro Series DO/Conductivity Cable
1-port combo cable for use with the YSI Professional Plus meter. The 1-port requires a DO probe while the conductivity is built right into the cable.
$635.00
$603.25
YSI 5083 Flow Cell
YSI 5083 Flow Cell
$410.00
$389.50
YSI Photometer Test Kits
Reagent starter kits for the YSI 9300 and 9500 photometers
$12.00
YSI 111 EcoSense Piercing pH Sensor
Double-junction, piercing tipped pH sensor with 1-meter cable
$150.00
$142.50
YSI 5239 Dissolved Oxygen Probe
Rugged field DO probe with easy-to-replace cap membranes
$580.00
$551.00
YSI ProDSS Cable Assemblies
Cable assemblies with 4 universal sensor ports and optional depth sensor
$1,760.00
YSI Flow Cells
For applications where it is impossible or undesirable to submerge the probe module into the sample
$340.00
$323.00
YSI EcoODO Probes and Cable Assemblies
EcoSense optical dissolved oxygen and temperature field cable and probe only
$595.00
YSI 5913 Dissolved Oxygen Cap Membrane Kit for Galvanic Sensors
Six-pack of 1.25 mil PE membranes with yellow caps
$60.00
$57.00
YSI EcoSense EC300 Conductivity Probes
Probe and cable assemblies for YSI EcoSense EC300 conductivity meter
$255.00
$242.25
YSI 3100/3200 Conductivity Cells
YSI conductivity cells with optional temperature sensor for use with YSI 3100/3200 conductivity instruments
$310.00
YSI 5564 & 5565 pH/ORP Probe
YSI pH/ORP probe is compatible with YSI 5563 cable assembly
$280.00
$266.00
YSI 400421 TruLine Nitrate Electrode Kit
Includes ISE with replaceable sensor module and refillable reference, fill solution, ISA, and high (1000 mg/L) standard.
$700.00
YSI 060906 Conductivity Standard
Conductivity standard, 1,413 uS/cm, +/- 1.0% tolerance, NIST traceable, case of eight individual pints
$125.00
YSI 1030 Pro Series ISE/Conductivity Cable
Requires an ISE probe while the conductivity sensor is built right into the cable
$475.00
$451.25
YSI 1010 Pro Series Dual ISE Cable
2-port combo cable for use with the YSI Professional Plus instrument. The 2-ports require ISE probes.
$575.00
$546.25
YSI 5905 Series Self-stirring BOD Probes
For measuring dissolved oxygen in all popular size BOD bottles
$750.00
$712.50
YSI 1020 Pro Series ISE/DO Cable
2-port combo cable for use with the YSI Professional Plus instrument. The 2-ports require a ISE and a DO probe.
$575.00
$546.25
YSI 400371 TruLine Ammonium Electrode Kit
Includes ISE with replaceable sensor module and refillable reference, fill solution, ISA, and high standard
$685.00
YSI 400393 TruLine Chloride Electrode Kit
Includes ISE with refillable reference, fill solution, ISA, and high standard
$675.00
YSI 5909 Dissolved Oxygen Cap Membrane Kit
Six-pack of 2 mil PE membranes with blue caps
$60.00
$57.00
YSI 1002 ORP Sensor
ORP sensor for YSI Pro Series analytical instruments
$205.00
$194.75
YSI 400427 TruLine Potassium Electrode Kit
Includes ISE with replaceable sensor module and refillable reference, fill solution, ISA, and high standard.
$865.00
YSI 626500 IDS ProOBOD Probe
Optical self-stirrring BOD probe with temperature sensor, IDS
$920.00
YSI 626482 OBOD Sensor Cap Kit
Replacement OBOD Sensor Cap Kit
$107.00
YSI 1203 pH/ATC Temperature Combination Electrode
pH/ATC temperature combination electrode with BNC connector and 1-meter cable
$155.00
$147.25
YSI 1007 Pro Series pH Sensor and Cable
Lab-grade pH sensor and 1- or 4-meter cable for the YSI Professional Plus meter
$190.00
$180.50
YSI 10 Pro Series ISE Cable
1-port cable for use with the Professional Plus instrument. The port requires a ISE probe.
$270.00
$256.50
YSI 5010 Series Self-stirring BOD Probes
Self-Stirring BOD Probes - Classic Design for True Reliability
$700.00
$665.00
YSI ScienceLine Temp 135 Temperature Sensor
Temperature sensor, stainless steel, 1 banana plug, NTC 30kOhm
$270.00
YSI Hard Carrying Case
The ultimate protection for your YSI Pro Series meter
$285.00
$270.75
YSI 1003 pH/ORP Sensor
pH/ORP sensor for YSI Pro Series analytical instruments
$295.00
$280.25
YSI 4410W Wireless FDO Sensor
Fluorescent dissolved oxygen probe for ranges of up to 20 mg/L and 200% saturation with temperature sensor up to 122°F
$775.00
YSI 5793 Standard Dissolved Oxygen Membrane 10-Pack
Stretch-style 1 mil membranes including electrolyte
$90.00
$85.50
YSI 5011 Cable Adapter
Connects probes to YSI 5000 and 5100 Benchtop DO meters
$110.00
$104.50
YSI ScienceLine Temp 136 Temperature Sensor
Temperature sensor, glass, 2 banana plugs, NTC 30kOhm
$230.00
YSI 1009 Pro Series pH/ORP Sensor and Cable
Lab-grade pH/ORP sensor and 1- or 4-meter cable for the YSI Professional Plus meter
$305.00
$289.75
YSI ODO/T Probe and Cable Assembly
Integral optical dissolved oxygen and temperature sensors, cable lengths available up to 100 meters
$740.00
YSI 400377 TruLine Bromide Electrode Kit
Includes ISE with refillable reference, fill solution, ISA, and high standard
$765.00
YSI 5775 Standard Dissolved Oxygen Membrane Kit
Stretch-style 1 mil membrane including electrolyte
$42.00
$39.90
YSI 606110 Electrode Kit
Electrode Kit, pH10A, Grey
$55.00
YSI 5794 High-Sensitivity Dissolved Oxygen Membrane 10-Pack
Stretch-style 0.5 mil membranes including electrolyte
$95.00
$90.25
YSI Cable Adapter
Cable to connect wireless sensors to wireless MultiLab units 4010-1W, 4010-2W, and 4010-3W
$100.00
YSI 3166 Conductance Calibrator Set
Resistor set verifies performance
$425.00
$403.75
YSI 250115Y Printer Paper
Printer paper for MultiLab 4010P-1, TruLab 1310P, and TruLab 1320P built in printers, 1 roll
$10.00
YSI 400407 TruLine Fluoride Electrode FS
TruLine Fluoride Electrode Reference Filling Solution, 60 mL
$20.00
YSI QSC Calibration Kit
Calibration kit for IDS pH electrode, 3 ampules: 4.01, 6.86, 9.18
$28.00
YSI 603056 Flow Cell Mounting Spike
Attaches to the base of the flow cell to stabilize it on the ground
$30.00
YSI 5238 Dissolved Oxygen Probe Reconditioning Kit
400 grit sanding discs and sanding tool
$32.00
$30.40
YSI 603070 Shoulder Strap
Shoulder strap for YSI Pro Series
$31.00
YSI 606330 Carrying Case
Carrying case, hard plastic with form fitted foam insert
$40.00
YSI TruLine Lead Low & High Standards
TruLine Lead Low and high Standard Solutions
$65.00
YSI 400441 TruLine Sodium ISA
TruLine Sodium Ionic Strength Adjustor, 500 mL
$65.00
YSI TruLine Ammonium Standard
TruLine Ammonium Low Standard Solution, 100 mg/L, 500 mL and high Standard Solution, 1000 mg/L, 500 mL
$65.00
YSI 1202 Temperature Probe
Stainless steel temperature probe with 10K thermistor
$76.00
$72.20
YSI Soft Carrying Case
Soft carrying case for YSI meters
$100.00
$95.00
YSI 606326 Sensor Cap Kit
Sensor Cap Kit for EcoSense ODO200
$105.00
YSI Soft Carrying Case
Organize any Pro Series meter and accessories while protecting them from the elements
$125.00
$118.75
YSI 400351 TruLine pH 17 Electrode
pH electrode no temperature, single-junction, combination, refillable, glass shaft with 1-m cable, BNC connector
$165.00
YSI 200900Y Data Hub
900 series data hub for infrared data transfer
$230.00
$218.50
YSI 400428 TruLine Potassium Electrode RM
TruLine Potassium Electrode Replacement Sensor Module, 1 each
$270.00
YSI 400439 TruLine Sodium Electrode Kit
Includes ISE with refillable reference, fill solution, ISA, and high standard
$535.00
YSI Thermoreactor
For COD/thermal digestions, 115V, fixed or selectable temperatures
$760.00
$722.00
YSI 400433 TruLine Silver/Sulfide Electrode Kit
Includes ISE with refillable reference, fill solution, ISA, and high silver standard
$730.00
YSI 400411 TruLine Iodide Electrode Kit
Includes ISE with refillable reference, fill solution, ISA, and high standard
$735.00
YSI 400445 TruLine Copper Electrode Kit
Includes ISE with refillable reference, fill solution, ISA, and high standard
$865.00
YSI ProOBOD Probe
Self-stirring to provide a representative sample and increase response times
$975.00
$926.25
YSI 5563 Cable/Sensor Assembly
Cable assembly with integral DO, temperature & conductivity sensors
$1,125.00
$1,068.75
YSI LR44 Batteries
Replacement LR44 Batteries
$5.00
$4.75
YSI Rochelle Salt Liquid Reagent
Rochelle Salt, liquid reagent, 30 ml or 500 ml, number of tests varies with hardness concentration
$12.50
YSI 605611 USB Cable
USB cable for connecting instrument with USB-mini B to a computer
$13.00
YSI 251416Y Hydrazine Reagent
Hydrazine, 100 mL for 50 tests, 0.004 to 0.600 mg/L
$17.00
YSI Iron Reagent
Iron, Total, Low Range, powder, pack of 100, multiple ranges
$19.50
YSI 400417 TruLine Lead Electrode FS
TruLine Lead Electrode Reference Filling Solution, 60 mL
$20.00
YSI 400412 TruLine Iodide Electrode FS
TruLine Iodide Electrode Reference Filling Solution, 60 mL
$20.00
YSI 400404 TruLine Cyanide Electrode FS
TruLine Cyanide Electrode Reference Filling Solution, 60 mL
$20.00
YSI 400446 TruLine Copper Electrode FS
TruLine Copper Electrode Reference Filling Solution, 60 mL
$20.00
YSI 400378 TruLine Bromide Electrode FS
TruLine Bromide Electrode Reference Filling Solution, 60 mL
$20.00
YSI 400373 TruLine Ammonium Electrode FS
TruLine Ammonium Electrode Reference Filling Solution, 60 mL
$20.00
YSI TruLine Ammonia Electrode FS
TruLine Ammonia Electrode Filling Solution, 60 mL
$20.00
YSI 400394 TruLine Chloride Electrode FS
TruLine Chloride Electrode Reference Filling Solution, 60 mL
$20.00
YSI 400389 TruLine Calcium Electrode FS
TruLine Calcium Electrode Reference Filling Solution, 60 mL
$20.00
YSI 400383 TruLine Cadmium Electrode FS
TruLine Cadmium Electrode Reference Filling Solution, 60 mL
$20.00
YSI 400440 TruLine Sodium Electrode FS
TruLine Sodium Electrode Reference Filling Solution, 60 mL
$20.00
YSI 400444 TruLine Sodium Soaking Solution
TruLine Sodium Soaking Solution, 60 mL
$20.00
YSI 400434 TruLine Silver/Sulfide Electrode FS
TruLine Silver/Sulfide Electrode Reference Filling Solution, 60 mL
$20.00
YSI 400423 TruLine Nitrate Electrode FS
TruLine Nitrate Electrode Reference Filling Solution, 60 mL
$20.00
YSI 400429 TruLine Potassium Electrode FS
TruLine Potassium Electrode Reference Filling Solution, 60 mL
$20.00
YSI Chlorine Total Reagent Powder
Chlorine, total reagent, powder, 10 mL, pack of 100 or 1000, 0.02 to 2.00 mg/L
$20.50
YSI Chlorine Reagent Powder
Chlorine, free reagent, powder, 10 mL, pack of 100 or 1000
$20.50
YSI 251392Y Primary Standard
Primary standard, 100 mL, 1.5 mg/L
$22.50
YSI 063517 Ultra Clamp
Ultra Clamp for YSI Pro Series
$25.00
YSI 605978 Cable / Probe Weight
Cable / Probe Weight, 4.9 oz, stackable, add to guard as needed to increase probe weight by 4.9 oz per piece
$27.00
YSI Sulfate Reagent
Sulfate, powder, 10 ml or 25 ml, pack of 100
$27.50
YSI 603069 Belt Clip
Belt Clip for Pro Series
$28.00
YSI 480 Shoulder Strap
Convenient shoulder strap keeps your instrument close by and safe when out sampling in the field
$30.00
$28.50
YSI Phosphate Reagent
Phosphate (Orthophosphate), powder pack reagent, pack of 100
$28.50
YSI 580 Soft Carrying Case
Soft carrying case YSI EcoSense pH10 and ORP15 tester
$30.00
$28.50
YSI Nitrite Reagent
Low Range, powder, 10 ml or 25 ml, pack of 100
$31.50
YSI COD Reagents
Low range and high range vials, Hg free option, pack of 25 or 150
$37.00
YSI Phosphorus Reagent
Phosphorus, Reactive (Orthophosphate), vial, pack of 50
$39.00
YSI 440 Cable Weight Kit
440 Cable Weight Kit
$39.00
YSI 251403Y Copper Reagent
Copper, Powder, pack of 100, 0.5 to 12.00 mg/L
$39.00
YSI 280 Hard Carrying Case
Hard sided carrying case for YSI EcoSense DO200 dissolved oxygen meter
$42.00
$39.90
YSI 180 Hard Carrying Case
Hard sided carrying case for YSI EcoSense pH100 meter
$42.00
$39.90
YSI 380 Hard Carrying Case
Hard sided carrying case for YSI EcoSense EC300 conductivity meter
$42.00
$39.90
YSI 5685 Half-Sensitivity Dissolved Oxygen Membrane Kit
Stretch-style 2 mil membrane for long-term monitoring situations
$45.00
$42.75
YSI Manganese Reagent
Manganese high Range or low range, powder, pack of 100
$44.00
YSI 606114 Conductivity Electrode
Conductivity electrode (replacement)
$46.00
YSI YPT284 Waterproof USB Cable
Replacement waterproof USB cable for the YSI 9500 photometer
$53.00
$50.35
YSI 626943 Li-Ion Rechargeable Battery Pack
For use with YSI ProSolo and ProDSS handhelds
$52.00
YSI Silica Reagent
Low, high and ultra high ranges available, pack of 100
$54.00
YSI 5776 High-Sensitivity Dissolved Oxygen Membrane Kit
Stretch-style 0.5 mil membrane including electrolyte
$57.00
$54.15
YSI EcoSense 601103 Temperature Probe
$55.00
YSI EcoSense pH10 Electrode
Single or double-junction pH electrodes for YSI EcoSense pH10 tester
$60.00
$57.00
YSI 5914 Dissolved Oxygen Cap Membrane Kit for Galvanic Sensors
Six-pack of 2 mil PE membranes with blue caps
$60.00
$57.00
YSI 5912 Dissolved Oxygen Cap Membrane Kit for Galvanic Sensors
Six-pack of 1 mil Teflon membranes with black caps
$60.00
$57.00
YSI TruLine Calcium Low & High Standards
TruLine Calcium Low and high Standard Solutions
$65.00
YSI TruLine Chloride Low & High Standards
TruLine Chloride Low and high Standard Solutions
$65.00
YSI TruLine Copper Low & High Standards
TruLine Copper Low and high Standard Solutions
$65.00
YSI 400370 TruLine Ammonia High Standard
TruLine Ammonia High Standard Solution, 1000 mg/L, 500 mL
$65.00
YSI TruLine Bromide Low & High Standards
TruLine Bromide Low and high Standard Solutions
$65.00
YSI TruLine Cadmium Low & High Standards
TruLine Cadmium Low and high Standard Solutions
$65.00
YSI TruLine Fluoride Low & High Standards
TruLine Fluoride Low and high Standard Solutions
$65.00
YSI TruLine Silver Low & High Standards
TruLine Silver Low and high Standard Solutions
$65.00
YSI TruLine Sodium Low & High Standards
TruLine Sodium Low and high Standard Solutions
$65.00
YSI EcoSense 601101 pH Electrode
$65.00
YSI TruLine Iodide Low & High Standards
TruLine Iodide Low and high Standard Solutions
$65.00
YSI TruLine Nitrate Low & High Standards
TruLine Nitrate Low and high Standard Solutions
$65.00
YSI TruLine Potassium Low & High Standards
TruLine Potassium Low and high Standard Solutions
$65.00
YSI 400447 TruLine Copper ISA
TruLine Copper Ionic Strength Adjustor, 500 mL
$65.00
YSI 400395 TruLine Chloride ISA
TruLine Chloride Ionic Strength Adjustor, 500 mL
$65.00
YSI 400408 TruLine Fluoride ISA
TruLine Fluoride Ionic Strength Adjustor, 500 mL
$65.00
YSI 400405 TruLine Cyanide ISA
TruLine Cyanide Ionic Strength Adjustor, 500 mL
$65.00
YSI 400379 TruLine Bromide ISA
TruLine Bromide Ionic Strength Adjustor, 500 mL
$65.00
YSI 400374 TruLine Ammonium ISA
TruLine Ammonium Ionic Strength Adjustor, 500 mL
$65.00
YSI 400390 TruLine Calcium ISA
TruLine Calcium Ionic Strength Adjustor, 500 mL
$65.00
YSI 400384 TruLine Cadmium ISA
TruLine Cadmium Ionic Strength Adjustor, 500 mL
$65.00
YSI 400413 TruLine Iodide ISA
TruLine Iodide Ionic Strength Adjustor, 500 mL
$65.00
YSI 400435 TruLine Silver ISA
TruLine Silver Ionic Strength Adjustor, 500 mL
$65.00
YSI 400436 TruLine Sulfide ISA
TruLine Sulfide Ionic Strength Adjustor, 500 mL
$65.00
YSI 400368 TruLine Ammonia ISA
TruLine Ammonia Ionic Strength Adjustor Solution used with ISE TruLine electrodes, 500 mL
$65.00
YSI 400369 TruLine Ammonia Low Standard
TruLine Ammonia Low Standard Solution, 100 mg/L, 500 mL
$65.00
YSI 400430 TruLine Potassium ISA
TruLine Potassium Ionic Strength Adjustor, 500 mL
$65.00
YSI 400418 TruLine Lead ISA
TruLine Lead Ionic Strength Adjustor, 500 mL
$65.00
YSI 400424 TruLine Nitrate ISA
TruLine Nitrate Ionic Strength Adjustor, 500 mL
$65.00
YSI 251993Y Nitrate Reagent
Nitrate, vial reagent, pack of 50 for 25 tests, 0.2-30 mg/L NO3-N; 1.0 - 133 NO3
$66.00
YSI EcoSense ORP15 Electrode
Replacement electrode for YSI EcoSense ORP15
$75.00
$71.25
YSI Ammonium NH4 Reagents
Nitrogen, Ammonia, powder pack of 100, low Range vial pack of 50, high range vial pack of 50 options
$81.00
YSI 626944 Li-Ion Rechargeable Battery Pack
For use with YSI ProSolo and ProDSS handhelds
$82.00
YSI Molybate Power Pack Reagent
Molybdate, powder, 10 ml or 25 ml, pack of 100
$82.00
YSI 251421Y Oxygen Scavenger Reagent
Oxygen Scavenger DEHA1, powder, pack of 100 0.004 to 0.450 mg/L
$87.00
YSI 251399Y Secondary Reference Standard
Secondary Reference Standard, pack of 3, 0.0, 0.20 and 1.0 mg/L
$87.00
YSI OBOD/BOD Probe Power Stirrer Adapter
Adapter with input for up to 3 stirrers to connect OBOD/BOD probes to MultiLab units 4010-1W, 4010-2W and 4010-3W
$90.00
YSI 603162 Carrying Case
Soft-sided carrying case, accommodates up to a 4-meter cable
$90.00
YSI 108142Y WA-M Wireless Meter Module
Module for wireless MultiLab meters that receives information from a wireless module on the sensor
$90.00
YSI YPT283 USB Power Supply
USB power supply for the YSI 9500 photometer
$95.00
$90.25
YSI EcoSense 605376 ORP Electrode
$98.00
YSI 3078 Flow Cell Adapter
Single port flow cell adapter for use with 603059 or 603076 flow cells
$100.00
YSI 108143Y WA-S Charger
Battery charger for MultiLab wireless sensor module
$100.00
YSI ProDSS ODO/CT Replacement Sensor Cap
Choice of 1 or 2 year warranty ODO sensor cap for ProDSS ODO/CT probes
$102.00
YSI Nitrogen Reagent
Nitrogen, Total, vial reagent pack, pack of 50 for 25 tests
$114.00
YSI 160 Electrode Simulator
Simulates pH 4, 7, and 10 to determine the accuracy of the YSI EcoSense pH 100 meter
$120.00
$114.00
YSI 251400Y Aluminum Al-1 TP Powder Pack
Aluminum, powder pack reagent set with 25 ml ECR Masking liquid reagent, 100 tests
$118.00
YSI 400353 TruLine pH 25 Electrode
pH electrode no temperature, single-junction, combination, gel electrolyte, epoxy shaft with 1-m cable, BNC connector
$125.00
YSI Universal Power Supply
Universal power supply for YSI MultiLab instruments
$125.00
YSI 108141Y WA-S Wireless Sensor Module
Module for wireless MultiLab IDS sensors that sends information to a wireless module on the meter
$130.00
YSI 400366 TruLine Ammonia Electrode RM
TruLine Ammonia Replacement Membrane Modules, 4 ea, includes fill solution
$130.00
YSI 112 EcoSense Flat Glass pH Sensor
Double-junction, flat glass pH sensor with 1-meter cable
$150.00
$142.50
YSI FDO Sensor Replacement Cap
Replacement cap for MultiLab FDO 4410W sensors
$150.00
YSI 4011 BOD Adapter
Connects 5010 BOD probe to MultiLab 4010-1W, 4010-2W, 4010-3W instruments
$160.00
YSI 251300Y Rechargeable Battery
Rechargeable battery for the pHotoFlex STD and pH; STD requires Lab Station
$170.00
$161.50
YSI 400356 TruLine ORP 51 Electrode
ORP electrode no temperature, single-junction, gel electrolyte, epoxy shaft with 1-m cable, BNC connector
$175.00
YSI 4010-2/3 pH Adapter
DIN or BNC adapter for ph, ORP, and ISE electrodes
$175.00
YSI 1008 Pro Series ORP Sensor and Cable
Lab-grade ORP/Temperature sensor and 1- or 4-meter cable for the YSI Professional Plus meter
$200.00
$190.00
YSI 400352 TruLine pH 26 Electrode
pH electrode with temperature, single-junction, 3 in 1, gel electrolyte, epoxy shaft with 1-m cable, BNC connector, 1 banana plug, NTC 30 kOhm
$195.00
YSI Hard Carrying Case
Hard-sided carrying case for the YSI 9500 Photometer
$215.00
$204.25
YSI Hard Carrying Case
Hard-sided carrying case for the YSI 9300 Photometer
$215.00
$204.25
YSI 400355 TruLine ORP 50 Electrode
ORP electrode no temperature, single-junction, refillable, glass shaft with 1-m cable, BNC connector
$215.00
YSI Stand and Holder
Stand and holder for the YSI MultiLab Line
$225.00
YSI IDS 4110 Probe
Combination pH and temperature, plastic, gel-filled, digital, double junction probe, 5 or 10-foot cable
$230.00
YSI 4110W Wireless Sensor
Gel-filled temperature and pH probe for ranges of temperature up to 176°F and pH up to 14
$230.00
YSI Pro1001A Amplified pH Sensor
Amplified pH sensor for the YSI Pro Series instruments
$230.00
YSI 400350 TruLine pH 15 Electrode
pH electrode with temperature, single-junction, 3 in 1, refillable, glass shaft with 1-m cable, BNC connector, 1 banana plug, NTC 30 kOhm
$235.00
YSI 400422 TruLine Nitrate Electrode RM
TruLine Nitrate Electrode Replacement Sensor Module, 1 each
$250.00
YSI TruLine pH 27 Electrode
pH electrode no temperature, single-junction, combination, flat glass membrane, glass shaft, 3.3ft cable, BNC connector
$255.00
YSI 4120W Wireless Sensor
Liquid-filled, refillable temperature and pH probe for ranges of temperature up to 176°F and pH up to 14
$265.00
YSI IDS 4120 Probe
Combination pH and temperature, plastic, 3 mol KCl, digital, double junction probe, 5-foot cable
$265.00
YSI 626945 Hard-Sided Carrying Case
Small case fits 1- and 4-meter cables with handheld, flow cell, and accessories
$270.00
YSI 400388 TruLine Calcium Electrode RM
TruLine Calcium Electrode Replacement Sensor Module, 1 each
$275.00
YSI 199163Y LSdata Software
LSdata software; GLP compliant PC software for data management and data transfer
$300.00
$285.00
YSI 400360 Science pHT-Pt Electrode
pH electrode with temperature, double-junction, Platinum junction, 3 in 1, glass shaft with 1-m cable
$300.00
YSI 108144Y WA-Kit Wireless Module Kit
Kit for use with 4010-1W, 4010-2W and 4010-3W MultiLab wireless units
$300.00
YSI 4210W Wireless Sensor
ORP probe with a range up to 1200mV and temperature range up to 212°F
$315.00
YSI IDS 4211 ORP Probe
Combination ORP and temperature, glass, digital, double junction probe, 5-foot cable
$315.00
YSI 400372 TruLine Ammonium Electrode RM
TruLine Ammonium Electrode Replacement Sensor Module, 1 each
$325.00
YSI 4130W Wireless Sensor
Temperature and pH probe for ranges of temperature up to 212°F and pH up to 14
$330.00
YSI IDS 4130 pH and Temperature Probe
Combination pH and temperature, glass, 3 mol KCL, digital, double junction probe, 5-foot cable
$330.00
YSI 1005 Chloride Sensor
Chloride sensor for YSI Pro Series analytical instruments
$365.00
$346.75
YSI Science pHT-G Electrode
pH electrode with temperature, double-junction, 3 in 1, ground joint junction, glass shaft with 3.3ft cable
$350.00
YSI 626946 Hard-Sided Carrying Case
Large case fits 10-, 20-, and 30-meter cable with cable management kit, handheld, and accessories
$350.00
YSI TruLine pH 21 Electrode
pH electrode no temperature, single-junction, combination, spear tip membrane, epoxy shaft with 3.3ft (1m) cable, BNC connector
$355.00
YSI 4310W Wireless Conductivity Sensor
Conductivity and temperature probe with ranges up to 2,000mS/cm and 212°F
$365.00
YSI 4310 Conductivity and Temperature Probe
Conductivity and temperature, epoxy body, 4-graphite electrodes, digital probe
$365.00
YSI 251301Y Lab Station
Lab Station for pHotoFlex series includes LSdata PC software, rechargeable batteries and univerisal plug, RS232. Barcode compatible
$390.00
$370.50
YSI 6118 Rechargeable Battery Pack Kit
YSI 6118 Rechargeable Battery Pack Kit
$400.00
$380.00
YSI Science pHT-Micro Electrode
pH electrode with temperature, double-junction, 3 in 1, platinum junction, micro electrode, glass shaft with 3.3ft cable
$475.00
YSI IoLine pH Electrode
pH electrode with temperature, triple-junction, Iodine/Iodide reference, 3 in 1, refillable, glass shaft with 1-m cable
$475.00
YSI IDS 4320 Conductivity and Temperature Probe
For ultrapure water applications, stainless steel body, 2 electrodes, digital probe, 5-foot cable
$505.00
YSI 4320W Wireless Conductivity Sensor
Conductivity and temperature probe with ranges up to 200mS/cm and 212°F
$505.00
YSI IoLine Micro pH Electrode
pH electrode with temperature, triple-junction, Iodine/Iodide reference, 3 in 1, refillable, micro electrode, glass shaft with 3.3ft (1m) cable
$610.00
YSI 400406 TruLine Fluoride Electrode Kit
Includes ISE with refillable reference, fill solution, ISA, and high standard
$660.00
YSI 4100 IDS ProBOD Polarographic Probe
Self-stirring membrane-covered temperature sensor with a 5ft (1.5m) cable
$725.00
YSI 400387 TruLine Calcium Electrode Kit
Includes ISE with replaceable sensor module and refillable reference, fill solution, ISA, and high standard
$810.00
YSI 400382 TruLine Cadmium Electrode Kit
Includes ISE with refillable reference, fill solution, ISA, and high standard
$810.00
YSI 4410 FDO Sensor
Fluorescent dissolved oxygen probe for ranges of up to 20 mg/L and up to 200% saturation with temperature sensor up to 122°F
$830.00
YSI 400416 TruLine Lead Electrode Kit
Includes ISE with refillable reference, fill solution, ISA, and high standard
$840.00