YSI Field Meters

YSI 556 MPS Multi-Probe Field Meter

The YSI 556 MPS simultaneously measures dissolved oxygen, pH, conductivity, temperature, ORP, and more.
The YSI 556 combines the versatility of an easy-to-use, easy-to-read handheld unit with all the functionality of a multiparameter system.

• Field replaceable DO, Conductivity, and pH/ORP electrode modules.
• Easy-to-use screw-on cap DO membranes.
• 4, 10 and 20 meter cable lengths available.
• Stores over 49,000 data sets, time and date stamped. Easy download to PC.
• Standard soft-sided carrying case with enough space for the YSI 556, 20-meter cable and calibrating supplies.
• Probe guard protects sensors for down-well or
  open channel readings.

YSI 556 MPS Specifications
YSI 556 MPS Operations Manual

YSI 30
Salinity/Conductivity/Temperature Meter

Read salinity, temperature, conductivity, or specific conductance simultaneously using the YSI 30. Advanced users can easily adjust compensation to a specific temperature or saline solution. The operations manual
provides reference tables and sections devoted to measurement science.

• Rugged probe and cable design
• Waterproof to IP65
• Easy to read, bright backlit display
• Microprocessor controlled self-diagnostics
• Built-in probe storage chamber
• Adjustable hand strap
• Meter available in 10, 25, 50, and 100 foot
  cable lengths
• 50 reading memory option available

YSI 30 Specifications
YSI 30 and 30M Operations Manual

YSI 55 & 55D Dissolved Oxygen Meters

Read dissolved oxygen and temperature simultaneously with the YSI 55. It automatically compensates for temperature, salinity, and barometric pressure requiring no external calculations.

• Rugged probe and cable design
• Waterproof to IP65
• Easy to read, bright backlit display
• Microprocessor controlled self-diagnostics
• Built-in probe storage chamber
• Adjustable hand strap
• Meter available in 12, 25, and 50 foot cable lengths
• YSI 55D model offers detachable cable and
  probe option

YSI 55 & 55D Specifications
YSI 55 Operations Manual

YSI 60 pH/Temperature Meter

The YSI 60 arrives factory calibrated, is waterproof and will float if dropped in water. This hand-held, waterproof meter uses the pH electrode/bulkhead probe assembly with built-in temperature compensation for simultaneous display of pH and temperature. Other features include a non-volatile memory capable of storing up to 50 measurements, one, two or three point calibration, low battery warning, and automatic buffer recognition.

• Light weight, rugged probe & cable design
• Waterproof case to IP65 standards
• Easy to read, bright backlit display
• 10', 50', or 100' cable lengths available
• Convenient built-in probe storage chamber

YSI 60 Specifications
YSI 60 Operations Manual

YSI 63 pH/Conductivity/Salinity/
Temperature Meter

This rugged, micro-processor based digital meter measures pH, conductivity, salinity and temperature with a single probe. It can take in-situ measurements down to 100' depending on cable length and store up to 50 sets of readings with on-screen recall. The YSI 63 performs a self-diagnostic routine each time the instrument is turned on providing useful information about the function of the instrument and probe. Meter also includes a transport chamber built into the instrument case for extra convenience. Other features include a field-replaceable low maintenance pH sensor, push-button calibration, and auto-ranging.

The YSI 63 arrives factory calibrated, is waterproof and will float if dropped in water.

• Light weight, rugged probe and cable design
• Waterproof case to IP65 standards
• Easy to read, bright backlit display
• 10', 50', or 100' cable lengths available
• Convenient built-in probe storage chamber

YSI 63 Specifications
YSI 63 Operations Manual

YSI 85
Salinity/Conductivity/Dissolved Oxygen/
Temperature Meter

This high quality multi-parameter device includes an Auto-range feature for conductivity and is factory calibrated for conductivity, never needing recalibration. Only a single dissolved oxygen calibration is required. For highly technical use, the Advanced Set-up mode provides high flexibility for very specific study parameters.

• Rugged probe and cable design
• Waterproof to IP65
• Easy to read, bright backlit display
• Microprocessor controlled self-diagnostics
• Built-in probe storage chamber
• Adjustable hand strap
• Meter available in 12, 25, 50, and 100 foot cable lengths for in-situ measurements
• Data logging feature – Records results from 50 sites with site identification and safely stores data points in non-volatile memory.

YSI 85 Specifications
YSI 85 Operations Manual

YSI 550A Dissolved Oxygen Instrument

The YSI 550A DO instrument features a waterproof (IP67), impact-resistant case and innovative field-replaceable DO electrode modules. Measure dissolved oxygen and temperature simultaneously using YSI’s proven polarographic technology for oxygen and YSI’s Temperature Precision™ thermistors, the planet-wide standard for accuracy. The new PE membranes provide faster response times with less stirring dependence – saving you time with every reading!

• Faster response time!
• Waterproof! Meets IP67 specifications
• Field-replaceable DO electrode modules
• Screw on cap membranes
• New PE membranes lessen stirring dependence!
• Over 2000 hours of battery life
• Calibrate in either mg/L or % saturation
• User-selectable temperature units (°C or °F)
• 12, 25, 50, and 100 foot cable lengths
• Manual salinity input from 0 to 70 ppt
• Three year instrument warranty, one-year on the
  DO module!

YSI 550A Specifications
YSI 550A Operations Manual