YSI
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. see 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.
- CATEGORIES
- Colorimeters (4)
- Conductivity / Resistivity / Salinity / TDS Meters (5)
- DO / COD Meters (9)
- ISE Meters (1)
- pH / ORP Meters (7)
- Photometers (1)
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The toughest, smartest and most versatile water quality meter available
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$1,125.00 $967.50 |
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Hand-held meter simultaneously measures dissolved oxygen, pH, conductivity, temperature and ORP
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Starting at $1,850.00 $1,628.00 |
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Handheld DO meter with true field performance and improved functionality
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Starting at $875.00 $752.50 |
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Handheld, luminescent based dissolved oxygen meter for any field application
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$695.00 $611.60 |
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Field-proven handheld water quality meter for dissolved oxygen and temperature
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Starting at $795.00 $699.60 |
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Rugged, reliable DO meter that is easy to operate while featuring user-replaceable sensors and cables
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$550.00 $473.00 |
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High accuracy, ±0.1%, conductivity measurement instruments
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Starting at $895.00 $787.60 |
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Measures dissolved oxygen, salinity, conductivity, specific conductance, TDS, barometric pressure and temperature
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$755.00 $664.40 |
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Highly accurate, reliable advanced instrumentation for measuring dissolved oxygen
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Starting at $1,295.00 $1,139.60 |
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Economical photometers allow for field readings of 100+ parameters
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Starting at $995.00 $875.60 |
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Accurate, economical, handheld measurements, IP67 waterproof housing
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Starting at $280.00 $246.40 |
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Accurate, economical, handheld measurements, IP67 waterproof housing
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Starting at $290.00 $255.20 |
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pH and temperature measurement in a pen-style tester with graphic display
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$115.00 $101.20 |
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Accurate, economical, handheld, IP67 waterproof housing
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Starting at $260.00 $228.80 |
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ORP and temperature measurement in a pen-style tester with graphic display
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$159.00 $139.92 |
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Single parameter colorimeter for total and free chlorine, ideal for laboratory and field testing
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$389.00 $342.32 |
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Simple, accurate laboratory-grade pH, mV and temperature measurements
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$525.00 $462.00 |
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Portable Colorimeters for lab and field, calibration adjustment for selected methods, multiparameters
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Starting at $995.00 $875.60 |
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Single parameter colorimeter for COD, rugged, waterproof, multi range ideal for laboratory and field testing
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$560.00 $492.80 |
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pH/mV electrode with BNC connector and 1-meter cable
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$57.00 $50.16 |
| Accessories | ||
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Cable and probe assemblies for YSI Pro Series analytical instruments
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Starting at $175.00 $154.00 |
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Sensors for YSI Pro Series analytical instruments
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Starting at $165.00 $145.20 |
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Full range of calibration solutions and standards for YSI analytical meters
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Starting at $31.00 $27.28 |
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YSI pH/ORP probe is compatible with YSI 5563 cable assembly
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Starting at $260.00 $228.80 |
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Cable assembly with integral DO, temperature & conductivity sensors
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Starting at $1,025.00 $902.00 |
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Probes and electrodes for use with the YSI pH100 meter
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Starting at $47.00 $41.36 |
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Self-Stirring BOD Probes - Classic Design for True Reliability
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Starting at $650.00 $572.00 |
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Six-pack of 1 mil Teflon membranes with black caps
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$56.00 $49.28 |
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For applications where it is impossible or undesirable to submerge the probe module into the sample
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Starting at $327.00 $287.76 |
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Replacement DO sensor module for YSI 550A and 556 dissolved oxygen meters
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$195.00 $171.60 |
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Probe and cable assemblies for YSI EcoSense DO200 dissolved oxygen meter
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Starting at $285.00 $250.80 |
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For measuring dissolved oxygen in all popular size BOD bottles
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Starting at $695.00 $611.60 |
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Reagent starter kits for the YSI 9300 and 9500 photometers
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Starting at $11.00 $9.68 |
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Six-pack of 1.25 mil PE membranes with yellow caps
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$56.00 $49.28 |
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The ultimate protection for your YSI Pro Series meter
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$270.00 $237.60 |
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YSI conductivity cells with optional temperature sensor for use with YSI 3100/3200 conductivity instruments
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Starting at $285.00 $250.80 |
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Resistor set verifies performance
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$350.00 $308.00 |
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YSI 5083 Flow Cell
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$400.00 $352.00 |
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Self-stirring to provide a representative sample and increase response times
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$895.00 $787.60 |
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Easy, efficient and accurate desktop software for the caluculation of BODs
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$575.00 $506.00 |
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Stretch-style 1 mil membrane including electrolyte
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$37.00 $32.56 |
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Probe and cable assemblies for YSI EcoSense EC300 conductivity meter
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Starting at $245.00 $215.60 |
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400 grit sanding discs and sanding tool
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$30.00 $26.40 |
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Rugged field DO probe with easy-to-replace cap membranes
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Starting at $510.00 $448.80 |
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YSI 6118 Rechargeable Battery Pack Kit
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$360.00 $316.80 |
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Single or double-junction pH electrodes for YSI EcoSense pH10 tester
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Starting at $52.00 $45.76 |
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Six-pack of 2 mil PE membranes with blue caps
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$59.00 $51.92 |
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Organize any Pro Series meter and accessories while protecting them from the elements
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$125.00 $110.00 |
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Chlorine, free reagent, powder, 10 mL, pack of 100 or 1000
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Starting at $19.00 $16.72 |
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YSI 3232 Adapter Cell
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$180.00 $158.40 |