Datasheet: YSI 550A Dissolved Oxygen Instrument

Looking for a rugged, field-worthy instrument for measuring dissolved oxygen? The new YSI 550A DO instrument 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™ thermistors, the planetwide standard for accuracy. Our new PE membranes provide faster response times with less stirring dependence - saving time with every reading!