YSI Professional Plus Multiparameter Meter
The toughest, smartest and most versatile water quality meter available
$1,220.00
$1,159.00
YSI 556 Multiparameter System
Hand-held meter simultaneously measures dissolved oxygen, pH, conductivity, temperature and ORP
Starting at
$1,920.00
$1,824.00
YSI 550A Dissolved Oxygen Meter
Handheld DO meter with true field performance and improved functionality
Starting at
$875.00
$831.25
YSI ProODO Dissolved Oxygen Meter
Handheld, luminescent based dissolved oxygen meter for any field application
$725.00
$688.75
YSI Pro20 Dissolved Oxygen Meter
Rugged, reliable DO meter that is easy to operate while featuring user-replaceable sensors and cables
$560.00
$532.00
YSI EcoSense DO200A Dissolved Oxygen / Temperature Meter
Accurate, economical, handheld measurements, IP67 waterproof housing
Starting at
$290.00
$275.50
YSI 5000 Series Dissolved Oxygen Meters
Highly accurate, reliable advanced instrumentation for measuring dissolved oxygen
Starting at
$1,390.00
$1,320.50
YSI Pro2030 Dissolved Oxygen & Conductivity Meter
Measures dissolved oxygen, salinity, conductivity, specific conductance, TDS, barometric pressure and temperature
$755.00
$717.25
YSI pH100A EcoSense pH100A pH/ORP Meter
Accurate, economical, handheld, IP67 waterproof housing
Starting at
$265.00
$251.75
YSI Pro30 Conductivity Meter
Handheld field meter for conductivity, salinity, TDS and temperature
$570.00
$541.50
YSI 9300 & 9500 Photometer
Economical photometers allow for field readings of 100+ parameters
Starting at
$1,070.00
$1,016.50
YSI 3100/3200 Conductivity Meters
High accuracy, ±0.1%, conductivity measurement instruments
Starting at
$930.00
$883.50
YSI Pro1030 Multiparameter Meter
Tough, smart and versatile pH/ORP/Conductivity/Salinity/TDS/Temperature meter designed for rugged field work
$750.00
$712.50
YSI EcoSense EC300A Conductivity Meter
Accurate, economical, handheld measurements, IP67 waterproof housing
Starting at
$300.00
$285.00
YSI EcoSense pH10 pH Tester
pH and temperature measurement in a pen-style tester with graphic display
$116.00
$110.20
YSI Pro1020 pH / ORP & DO Meter
Handheld meter that measures dissolved oxygen and temperature along with either pH or ORP (redox)
$750.00
$712.50
YSI EcoSense ORP15 ORP Tester
ORP and temperature measurement in a pen-style tester with graphic display
$167.00
$158.65
YSI 900 Chlorine Colorimeter
Single parameter colorimeter for total and free chlorine, ideal for laboratory and field testing
$395.00
YSI MultiLab 4010-2 Water Quality Instrument
Two channel input for pH, ORP, optical-based DO/BOD, or conductivity, large, easy to read color display
Starting at
$1,480.00
YSI pHotoFlex Colorimeter
Portable Colorimeters for lab and field, calibration adjustment for selected methods, multiparameters
Starting at
$1,010.00
YSI MultiLab 4010-3 Water Quality Instrument
Three channel input for pH, ORP, Optical-Based DO/BOD, or conductivity, antibacterial keypad, large, easy to read color display
$1,900.00
YSI pH1200 pH/mV Meter
Simple, accurate laboratory-grade pH, mV and temperature measurements
$535.00
$508.25
YSI MultiLab 4010-1 Water Quality Instrument
Single channel input for pH, ORP, Optical-Based DO/BOD, or conductivity, large, easy to read backlit graphic display
Starting at
$1,095.00
YSI 910 COD Colorimeter
Single parameter colorimeter for COD, rugged, waterproof, multi range ideal for laboratory and field testing
$565.00
YSI 1201 pH/mV Electrode
pH/mV electrode with BNC connector and 1-meter cable
$57.00
$54.15
YSI Pro10 pH / ORP Meter
Portable, user replaceable sensors and cables, 50 data set memory, IP67 protection
$485.00
YSI TruLab pH/ISE 1320 Laboratory Benchtop Meter
Dual channel meter for dual measurement of pH, mV (ORP) or ISE, AutoRead function improves repeatability
Starting at
$1,595.00
YSI ProDSS Multiparameter Meter
Portable digital sampling system for the measurement of up to 17 water quality parameters
Starting at
$1,600.00
Accessories
YSI 5563 Cable/Sensor Assembly
Cable assembly with integral DO, temperature & conductivity sensors
Starting at
$1,071.00
$1,017.45
In Stock
YSI Calibration Solutions and Standards
Full range of calibration solutions and standards for YSI analytical meters
Starting at
$33.00
In Stock
YSI ProODO Cable and Probe
ProODO cable and probe includes ODO optical DO sensor and sensing cap
Starting at
$665.00
$631.75
In Stock
YSI 5564 & 5565 pH/ORP Probe
YSI pH/ORP probe is compatible with YSI 5563 cable assembly
Starting at
$275.00
$261.25
YSI 5790 Pro Series Quatro Cable
4-port cable for use with the YSI Professional Plus meter. Create a powerful multiparameter sampling instrument.
Starting at
$1,345.00
$1,277.75
In Stock
YSI 5908 Dissolved Oxygen Cap Membrane Kit
Six-pack of 1.25 mil PE membranes with yellow caps
$60.00
$57.00
YSI 5010 Series Self-stirring BOD Probes
Self-Stirring BOD Probes - Classic Design for True Reliability
Starting at
$680.00
$646.00
YSI 559 Replacement DO Sensor Module
Replacement DO sensor module for YSI 550A and 556 dissolved oxygen meters
$195.00
$185.25
YSI 5906 Dissolved Oxygen Cap Membrane Kit
Six-pack of 1 mil Teflon membranes with black caps
$60.00
$57.00
YSI 2003 Polarographic DO Sensor
Polarographic dissolved oxygen sensor for YSI Pro Series analytical instruments
$180.00
$171.00
YSI EcoSense pH100 pH Probes
Probes and electrodes for use with the YSI pH100 meter
Starting at
$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.
Starting at
$250.00
$237.50
YSI 2002 Galvanic DO Sensor
Galvanic dissolved oxygen sensor for YSI Pro Series analytical instruments
$180.00
$171.00
In Stock
YSI 5560 Conductivity/Temperature Probe
Combination temperature and conductivity sensor for YSI Pro Series analytical instruments
$430.00
$408.50
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.
Starting at
$620.00
$589.00
YSI Photometer Test Kits
Reagent starter kits for the YSI 9300 and 9500 photometers
Starting at
$12.00
YSI 5905 Series Self-stirring BOD Probes
For measuring dissolved oxygen in all popular size BOD bottles
Starting at
$725.00
$688.75
YSI 1001 pH Sensor
pH sensor for YSI Pro Series analytical instruments
$175.00
$166.25
In Stock
YSI Flow Cells
For applications where it is impossible or undesirable to submerge the probe module into the sample
Starting at
$335.00
$318.25
YSI 30 Pro Series Conductivity Cable
Allows for the measurement of conductivity, specific conductance, salinity, total dissolved solids and temperature
Starting at
$320.00
$304.00
YSI Hard Carrying Case
The ultimate protection for your YSI Pro Series meter
$285.00
$270.75
YSI 5083 Flow Cell
YSI 5083 Flow Cell
$400.00
$380.00
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.
Starting at
$560.00
$532.00
YSI 1030 Pro Series Dual ISE/Conductivity Cable
1-port combo cable for use with the YSI Professional Plus instrument. The 1-port requires a ISE probe while the conductivity sensor is built right into the cable.
Starting at
$460.00
$437.00
YSI 1004 Ammonium, NH4+ Sensor
Ammonium, NH4+ sensor for YSI Pro Series analytical instruments
$360.00
$342.00
YSI 5239 Dissolved Oxygen Probe
Rugged field DO probe with easy-to-replace cap membranes
Starting at
$520.00
$494.00
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.
Starting at
$560.00
$532.00
YSI 5775 Standard Dissolved Oxygen Membrane Kit
Stretch-style 1 mil membrane including electrolyte
$40.00
$38.00
YSI 1005 Chloride Sensor
Chloride sensor for YSI Pro Series analytical instruments
$360.00
$342.00
YSI 625120 BOD Analyst Pro Software
Easy, efficient and accurate desktop software for the caluculation of BODs
$595.00
$565.25
YSI 1002 ORP Sensor
ORP sensor for YSI Pro Series analytical instruments
$205.00
$194.75
YSI 1006 Nitrate Sensor
Nitrate sensor for YSI Pro Series analytical instruments
$360.00
$342.00
YSI 5238 Dissolved Oxygen Probe Reconditioning Kit
400 grit sanding discs and sanding tool
$30.00
$28.50
YSI 060906 Conductivity Standard
Conductivity standard, 1,413 uS/cm, +/- 1.0% tolerance, NIST traceable, case of eight individual pints
$124.00
YSI 1003 pH/ORP Sensor
pH/ORP sensor for YSI Pro Series analytical instruments
$295.00
$280.25
YSI Ammonium NH4 Reagents
Nitrogen, Ammonia, powder pack of 100, low Range vial pack of 50, high range vial pack of 50 options
Starting at
$79.00
YSI 3166 Conductance Calibrator Set
Resistor set verifies performance
$350.00
$332.50
YSI 3100/3200 Conductivity Cells
YSI conductivity cells with optional temperature sensor for use with YSI 3100/3200 conductivity instruments
Starting at
$290.00
$275.50
YSI Soft Carrying Case
Organize any Pro Series meter and accessories while protecting them from the elements
$125.00
$118.75
YSI 5909 Dissolved Oxygen Cap Membrane Kit
Six-pack of 2 mil PE membranes with blue caps
$60.00
$57.00
YSI EcoSense DO200 Dissolved Oxygen Probes
Probe and cable assemblies for YSI EcoSense DO200 dissolved oxygen meter
Starting at
$310.00
$294.50
YSI 3232 Adapter Cell
YSI 3232 Adapter Cell
$185.00
$175.75
YSI 1007 Pro Series pH Sensor and Cable
Lab-grade pH sensor and 1- or 4-meter cable for the YSI Professional Plus meter
Starting at
$188.00
$178.60
YSI EcoSense pH10 Electrode
Single or double-junction pH electrodes for YSI EcoSense pH10 tester
Starting at
$53.00
$50.35
YSI 10 Pro Series ISE Cable
1-port cable for use with the Professional Plus instrument. The port requires a ISE probe.
Starting at
$260.00
$247.00
YSI 251993Y Nitrate Reagent
Nitrate, vial reagent, pack of 50 for 25 tests, 0.2-30 mg/L NO3-N; 1.0 - 133 NO3
$65.00
YSI 626500 IDS ProOBOD Probe
Optical Self stirrring BOD probe with temperature sensor, IDS
$910.00
YSI 301710Y IDS 4310 Conductivity and Temperature Probe
Conductivity and temperature, Epoxy body, 4-graphite electrodes, digital probe, 1.5 or 3 meter cable
Starting at
$360.00
YSI ProOBOD Probe
Self-stirring to provide a representative sample and increase response times
$940.00
$893.00
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 5794 High-Sensitivity Dissolved Oxygen Membrane 10-Pack
Stretch-style 0.5 mil membranes including electrolyte
$90.00
$85.50
YSI 5793 Standard Dissolved Oxygen Membrane 10-Pack
Stretch-style 1 mil membranes including electrolyte
$88.00
$83.60
YSI 170 Electrode Stand
Securely holds electrodes during measurements in a lab setting
$97.00
$92.15
YSI ProBOD Probe
Self-stirring BOD probes designed to fit into standard U.S. style 300 mL BOD bottles
$705.00
YSI 580 Soft Carrying Case
Soft carrying case YSI EcoSense pH10 and ORP15 tester
$29.00
$27.55
YSI 5776 High-Sensitivity Dissolved Oxygen Membrane Kit
Stretch-style 0.5 mil membrane including electrolyte
$44.00
$41.80
YSI Soft Carrying Case
Soft carrying case for YSI meters
$105.00
$99.75
YSI 1203 pH/ATC Temperature Combination Electrode
pH/ATC temperature combination electrode with BNC connector and 1-meter cable
$150.00
$142.50
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
Starting at
$300.00
$285.00
YSI LR44 Batteries
Replacement LR44 Batteries
$5.00
$4.75
YSI 6118 Rechargeable Battery Pack Kit
YSI 6118 Rechargeable Battery Pack Kit
$360.00
$342.00
YSI Nitrite Reagent
Low Range, powder, 10 ml or 25 ml, pack of 100
Starting at
$31.00
YSI COD Reagents
Low range and high range vials, Hg free option, pack of 25 or 150
Starting at
$36.00
YSI Silica Reagent
Low, high and ultra high ranges available, pack of 100
Starting at
$53.00
YSI Rochelle Salt Liquid Reagent
Rochelle Salt, liquid reagent, 30 ml or 500 ml, number of tests varies with hardness concentration
Starting at
$12.00
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
$16.50
YSI Iron Reagent
Iron, Total, Low Range, powder, pack of 100, multiple ranges
Starting at
$19.00
YSI Chlorine Reagent Powder
Chlorine, free reagent, powder, 10 mL, pack of 100 or 1000
Starting at
$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
Starting at
$20.00
YSI 251392Y Primary Standard
Primary standard, 100 mL, 1.5 mg/L
$22.00
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
Starting at
$27.00
YSI 480 Shoulder Strap
Convenient shoulder strap keeps your instrument close by and safe when out sampling in the field
$29.00
$27.55
YSI 603069 Belt Clip
Belt Clip for Pro Series
$28.00
YSI 109830Y Calibration Kit
Calibration kit for IDS pH electrode, 3 ampules: 4.01, 6.86, 9.18
$28.00
YSI Phosphate Reagent
Phosphate (Orthophosphate), powder pack reagent, pack of 100
Starting at
$28.00
YSI 063507 Tripod
Tripod, Ideal in the lab or any other level surface
$30.00
YSI 603070 Shoulder Strap
Shoulder strap for YSI Pro Series
$31.00
YSI 380 Hard Carrying Case
Hard sided carrying case for YSI EcoSense EC300 conductivity meter
$40.00
$38.00
YSI 251403Y Copper Reagent
Copper, Powder, pack of 100, 0.5 to 12.00 mg/L
$38.00
YSI Phosphorus Reagent
Phosphorus, Reactive (Orthophosphate), vial, pack of 50
Starting at
$38.00
YSI 180 Hard Carrying Case
Hard sided carrying case for YSI EcoSense pH100 meter
$40.00
$38.00
YSI 280 Hard Carrying Case
Hard sided carrying case for YSI EcoSense DO200 dissolved oxygen meter
$40.00
$38.00
YSI 5685 Half-Sensitivity Dissolved Oxygen Membrane Kit
Stretch-style 2 mil membrane for long-term monitoring situations
$42.00
$39.90
YSI Manganese Reagent
Manganese high Range or low range, powder, pack of 100
Starting at
$43.00
YSI YPT284 Waterproof USB Cable
Replacement waterproof USB cable for the YSI 9500 photometer
$51.00
$48.45
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 1202 Temperature Probe
Stainless steel temperature probe with 10K thermistor
$75.00
$71.25
YSI EcoSense ORP15 Electrode
Replacement electrode for YSI EcoSense ORP15
$75.00
$71.25
YSI Molybate Power Pack Reagent
Molybdate, powder, 10 ml or 25 ml, pack of 100
Starting at
$80.00
YSI 251399Y Secondary Reference Standard
Secondary Reference Standard, pack of 3, 0.0, 0.20 and 1.0 mg/L
$85.00
YSI 251421Y Oxygen Scavenger Reagent
Oxygen Scavenger DEHA1, powder, pack of 100 0.004 to 0.450 mg/L
$85.00
YSI YPT283 USB Power Supply
USB power supply for the YSI 9500 photometer
$91.00
$86.45
YSI 603162 Carrying Case
Soft sided carrying case, accommodates up to a 4 meter cable
$90.00
YSI 5011 Cable Adapter
Connects probes to YSI 5000 and 5100 Benchtop DO meters
$99.00
$94.05
YSI Nitrogen Reagent
Nitrogen, Total, vial reagent pack, pack of 50 for 25 tests
Starting at
$111.00
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
$115.00
YSI 902867 Universal Power Supply
Universal power supply for YSI MultiLab instruments
$125.00
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 112 EcoSense Flat Glass pH Sensor
Double-junction, flat glass pH sensor with 1-meter cable
$147.00
$139.65
YSI 111 EcoSense Piercing pH Sensor
Double-junction, piercing tipped pH sensor with 1-meter cable
$147.00
$139.65
YSI 251300Y Rechargeable Battery
Rechargeable battery for the pHotoFlex STD and pH; STD requires Lab Station
$169.00
$160.55
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 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 Adapter pH Adapter
DIN or BNC pH adapter for 4010-2/3
Starting at
$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
Starting at
$200.00
$190.00
YSI Hard Carrying Case
Hard-sided carrying case for the YSI 9500 Photometer
$205.00
$194.75
YSI Hard Carrying Case
Hard-sided carrying case for the YSI 9300 Photometer
$205.00
$194.75
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 200900Y Data Hub
900 series data hub for infrared data transfer
$225.00
$213.75
YSI 400355 TruLine ORP 50 Electrode
ORP electrode no temperature, single-junction, refillable, glass shaft with 1-m cable, BNC connector
$215.00
YSI 103740Y /103741Y IDS 4110 Probe
Combination pH and temperature, Plastic, Gel filled, digital, double junction probe, 1.5 or 3 meter cable
Starting at
$225.00
YSI 109813Y Stand and Holder
Stand and holder for the YSI MultiLab Line
$225.00
YSI 400364 ScienceLine Temp 136 Temperature Sensor
Temperature sensor, glass, 1 banana plug, NTC 30 kOhm
$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 EcoSense EC300 Conductivity Probes
Probe and cable assemblies for YSI EcoSense EC300 conductivity meter
Starting at
$250.00
$237.50
YSI 400354 TruLine pH 27 Electrode
pH electrode no temperature, single-junction, combination, flat glass membrane, glass shaft w/1-m cable, BNC connector
$255.00
YSI 103750Y IDS 4130 Probe
Combination pH and temperature, Plastic, 3 mol KCl, digital,double junction probe, 1.5 meter cable
$260.00
YSI 400363 ScienceLine Temp 135 Temperature Sensor
Temperature sensor, stainless steel, 1 banana plug, NTC 30 kOhm
$270.00
YSI 199163Y LSdata Software
LSdata software; GLP compliant PC software for data management and data transfer
$295.00
$280.25
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 103790Y IDS 4210 ORP Probe
Combination ORP, Glass , digital, double junction probe, 1.5 meter cable
$310.00
YSI 103780Y IDS 4120 pH and Temperature Probe
Combination pH and temperature, Glass, 3 mol KCL, digital, double junction probe, 1.5 meter cable
$325.00
YSI 400361 Science pHT-Pt Electrode
pH electrode with temperature, double-junction, 3 in 1, ground joint junction, glass shaft with 1-m cable
$350.00
YSI 400357 TruLine pH 21 Electrode
pH electrode no temperature, single-junction, combination, spear tip membrane, epoxy shaft with 1-m cable, BNC connector
$355.00
YSI 251301Y Lab Station
Lab Station for pHotoFlex series includes LSdata PC software, rechargeable batteries and univerisal plug, RS232. Barcode compatible
$379.00
$360.05
YSI ProDSS Smart Sensors
Smart sensors for use with the YSI ProDSS multiparameter meter
Starting at
$450.00
YSI 400362 Science pHT Electrode
pH electrode with temperature, double-junction, 3 in 1, Platinum junction, Micro electrode, glass shaft with 1-m cable
$475.00
YSI 400358 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 301720Y IDS 4320 Conductivity and Temperature Probe
Conductivity and temperature, Stainless Steel body, 2-electrodes, digital probe, 1.5 meter cable
$495.00
YSI 400359 IoLine Micro pH Electrode
pH electrode with temperature, triple-junction, Iodine/Iodide reference, 3 in 1, refillable, Micro electrode, glass shaft with 1-m cable
$610.00
YSI Thermoreactor
For COD/thermal digestions, 115V, fixed or selectable temperatures
Starting at
$760.00
$722.00
YSI ProDSS Cable Assemblies
Cable assemblies with 4 universal sensor ports and optional depth sensor
Starting at
$1,720.00