Dissolved oxygen sensors
YSI 550 Dissolved oxygen instrument
True Field Performance
 Looking
for a rugged, field-worthy instrument for measuring dissolved oxygen?
The new YSI 550 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.
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- and 25-foot cable lengths
· Three-year warranty on the instrument and one-year on the DO module
and cable!
Packed With Features
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 550 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.
Dissolved
Oxygen Accessories
Frequently
Asked Questions about the YSI 550 DO Instrument
Sales
and Ordering Support
YSI 55
Dissolved oxygen instrument
 Specifications
Field-proven, the YSI 55 DO Instrument measures
dissolved oxygen in mg/L or percent saturation. Offering push-button
calibration with a built-in calibration chamber, direct salinity,
and altitude compensation, the YSI 55 provides simultaneous readings
of oxygen and temperature. Dissolved oxygen readings are automatically
compensated for temperature. Also available is the YSI 55D with
a detachable cable.
- Probe is weighted for quick sinking
- Large, easy-to-read backlit display
- Cables are available in 12, 25, or 50 feet
lengths (3.7, 7.6 and 15.2m)
- Meets IP-65 water tightness requirements
- Low-battery indicator on the display
- CE compliant version available
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