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YSI™ Model 556 Multi-Probe System

Multi-functional handheld DO meter

Manufacturer: ysi™  556-01

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Catalog No. 13-298-64


Description & Specifications


Range (pH) 0 to 14
Resolution (pH) 0.01
Range (ORP) -999 to 999mV
Range (Conductivity) 0 to 100mS/cm
Resolution (Conductivity) 0.001 to 0.1 mS/cm
Range (Salinity) 0 to 70ppt
Resolution (Salinity) 0.01ppt
Resolution (Temperature) 0.1°C
Outputs RS232
Certifications/Compliance Conforms to GLP, CE Compliant
Weight (Metric) 916g
Weight (English) 2 lb.
Model 556
Range (DO) 0 to 50mg/L
Resolution (DO) 0.01mg/L
Resolution (ORP) 0.1mV
Shipping Weight (Metric) 4.7 in.
Width (English) 11.9cm
Warranty 3 years
Product Type DO Meter

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)