YSI 550A DO Meter | Water Monitoring | Water Quality Instruments

True Field Performance

Looking for a rugged, field-worthy instrument for measuring dissolved oxygen? The new YSI 550A DO features a waterproof IP-67, 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 Temperature Precision TM thermistors, the worldwide standard for accuracy.

Features

• Waterproof! Meets IP-67 specifications
• Field-replaceable DO electrode modules
• Screw-on cap membranes
• Over 2000 hours battery life
• Calibrate in either mg/L or % saturation
• User-selectable temperature units (°C or °F)
• 12, 25, 50, and 100-foot cable lengths
• Expanded DO and salinity ranges for a wider application range
• Three-year warranty on the instrument and one-year on the DO module and cable!

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 has a built-in calibration chamber, low-battery indicator, direct salinity, and altitude compensation. The instrument provides simultaneous readings of oxygen and temperature. Dissolved oxygen readings are automatically compensated for temperature.