YSI 550A: Dissolved oxygen meter

The YSI 550A dissolved oxygen meter features a waterproof, 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 Precision ^TM thermistors, the worldwide standard for accuracy.  Measurements are fast and easy with one-hand operation, an easy-to-use backlit display, automatic push-button calibration, and a weighted, quick-sinking probe. The YSI 550A DO meter has a built-in calibration chamber, low-battery indicator, and salinity and altitude compensation. The new PE membranes are standard with the 550A and provide greatly reduced stirring dependence and faster response times. Additional options with the 550A include 50 and 100’ cables and measurement ranges up to 50 mg/L (500% saturation).

Features:

• Measures dissolved oxygen and temperature

• Field-replaceable DO electrode 

• Easy-to-use, screw-on PE cap membranes

• Over 2000 hours of battery life

• Calibrate in either mg/L or % saturation

• User-selectable temperature units (°C or °F)

• Meets IP-67 water tightness requirements, submersible to 3 feet

Select the proper replacement membranes to maintain your DO probe.

For complete specifications view the YSI 550 Specification Sheet in PDF format (10.4 KB).