550A

The YSI 550A Handheld Dissolved Oxygen Instrument is a microprocessor based, digital instrument with a field-replaceable YSI dissolved oxygen probe. The YSI 550A DO Instrument is impact-resistant and waterproof. It is designed for field use and is available with cable lengths of 12, 25, 50, or 100 feet (3.5, 7.5, 15, 30.5 meters). The body of the probe has been manufactured with stainless steel to add rugged durability and sinking weight.

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Availability: Commercially Available

environmental@ysi.com
+1 937 767 7241
1700/1725 Brannum Lane
Yellow Springs, OH 45387
USA
www.ysi.com
Manufacturer
YSI, Inc.
Product Name
550A
Detection Category
Chemical;
Detection Principle
Sensors;
Application
Water Quality;
Equipment Type
Sensor
Product Synopsis
The YSI 550A Handheld Dissolved Oxygen Instrument is a microprocessor based, digital instrument with a field-replaceable YSI dissolved oxygen probe. The YSI 550A DO Instrument is impact-resistant and waterproof. It is designed for field use and is available with cable lengths of 12, 25, 50, or 100 feet (3.5, 7.5, 15, 30.5 meters). The body of the probe has been manufactured with stainless steel to add rugged durability and sinking weight.
Availability
Commercially Available
Technology Readiness Level (TRL)
9
User Feedback Sources
Indifferent/No user feedback
Dimensions
4.7 x 9 in (120 x 229 mm)
Weight
<5 lbs.; 2 lbs (0.91 kg)
Power Requirements
Alkaline Battery; 4 alkaline C-cells
Transportability
Pocket Size
Ruggedness
Waterproof/Resistant; Dust; IP67, high impact resistant
Consumables
<$1,000/year; Sensors, membrane kits (every 8 wks), DO module and battery
Calibration Schedule
Yes
Suggested Routine Maintenance
May require replacement of DO electrodes
Shelf Life
<6 months; 3 Months
Unit Cost
$900.00
Maintenance Cost
Membrane kits $56
Other Chemical Targets
Measures dissolved oxygen
Sample Introduction
Liquid
Sensitivity/Detection Limits
%; mg; 0 to 500% air saturation dissolved oxygen %, 0 to 50 mg/L oxygen
Known Interferents/Inhibitors
Chlorine, sulfur dioxide, nitric oxide, and nitrous oxide can affect readings by behaving like oxygen at the probe.
Start Up Time (From Cold Start To Sample Ready)
5 – 15 minutes
Response Time (Sample Application To Output)
Continuous (<30 seconds); 9 seconds
Training Required
<1 day training
Manuals Available
Yes
Warranties
3 year instrument, 1 year DO module
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