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YSI™ Model 556 Multi-Probe System

Multi-functional handheld DO meter

$3,494.17 - $3,903.64


Range (Conductivity) 0 to 100mS/cm
Range (pH) 0 to 14
Range (DO) 0 to 50mg/L
Range (ORP) -999 to 999mV
Range (Salinity) 0 to 70ppt
View More Specs

Includes: Four “C” batteries, operating manual, and soft carrying case.

Products ${productFamilyLength}
Catalog Number Mfr. No. Product Type Price Quantity  
Catalog Number Mfr. No. Product Type Price Quantity  
13-298-64 YSI™
DO Meter Each for $3,494.17
13-298-65 YSI™
DO Meter with Barometer Each for $3,903.64


Features push-button calibration, direct salinity and altitude compensation, and conductivity autoranging. Dissolved oxygen calibration can be executed in either mg/L or % air saturation, and readings automatically compensate for temperature.

  • Stores more than 49,000 time– and date–stamped data sets with up to eight parameters each Compatible with EcoWatch™ for Windows™ data analysis software (order separately; contact your Fisher Scientific™ representative)
  • Conforms to GLP standards
  • Unit is rugged, reliable and designed for convenience
  • Waterproof and impact-resistant IP67 housing
  • DO electrode modules and pH/ORP probes are easily replaced in the field
  • DO membranes are screw-on caps; probe is weighted for fast sinking
  • New DO membranes provide faster DO response times and lessen stirring dependency
  • Meter weighs 2 lb. (916g); measures 41 1/16W x 9 in. H (11.9 x 22.9cm)

Order Info

Order probes separately.


CE marked, CE compliant.


Three-year warranty on instrument, one-year on probe module.

Description & Specifications


0 to 100mS/cm
0 to 50mg/L
0 to 70ppt
2 lb.
0 to 14
-999 to 999mV
3 years