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MultiDO Monitoring and Control Instrument

Designed specifically for Aquaculture Systems, the YSI 5500D and AquaManager® Software integrate process control, alarming, and data management into one product. Simple enough to monitor one tank, powerful enough to manage a full scale farming operation from anywhere in the world. Simultaneously measure dissolved oxygen with optcial technology in multiple tanks or ponds.

This product is RoHS Compliant
YSI 5500D Continuous Optical Dissolved Oxygen Instrument for Aquaculture
Send me a Quote!

YSI Advancements in Monitoring & Control Technology Webinar 1213 from YSI

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Optical Dissolved Oxygen (DO) Meter for Continuous Monitoring and Control

"5500D monitors and their optical probes proved to be a valuable tool for the management of super-intensive shrimp culture, allowing quick adjustments to be made to minimize stress from low DO while setting upper and lower DO limits helped to optimize oxygen use." Dr. Tzachi Samocha

WIn a System!  Enter to win - it's quick, easy and smart.

Designed specifically for aquaculture systems, the YSI 5500D continuous monitor for dissolved oxygen and AquaManager® Software can be used to integrate process control, feeding, alarming and data management into one product or can be used to simply monitor one tank. With YSI's ODO® optical dissolved oxygen technology you'll benefit from reduced costs, less maintenance and better data. The ODO sensors require no membrane changes, no electrode cleaning, no stirring requirement and less frequent calibrations.

Access your facilities water quality data at any time with the AquaViewer App from the App Store or manage your network with AquaManager desktop software.

  • MultiDO monitor using optical DO technology; 1-4 DO probe inputs depending on model
  • Ethernet TCP/IP or wireless communications - optional
  • Event logging records calibrations, high and low conditions, and more
  • Conditional feed timer with Feed Smart software included
  • Networking capability up to 32 instruments per communications port or integration with 5200As and 5400s
  • Graphic interface function for quick, reliable system status with the use of AquaManager software
  • Plug-and-play...easy to install, setup and maintain; no need to hire consultants
  • Flexible control software
  • E-mail and SMS alarming
  • AquaViewer app available for easy access to data at any time

The standard conditional feed timer, Feed Smart, manages food delivery based on user's preset criteria. Manage feed delivery based on user-selectable inputs for the number of daily feedings, daily feed weights, total biomass and feed conversion ratios (FCRs), along with parameter control based on water quality values. Interfaces with most auto feeders.

Optional AquaManager® desktop software allows you to view, configure, or setup instruments from the convenience of one central location. Instantly see an overview of your facility, manage parameter set points, and conveniently manage data to make informed operational decisions. The facility mapping feature provides an immediate overview of all ponds or tanks indicating their current state.




Several versions are available:

5500D-01-AC 606905 Single channel optical DO monitor; 110-230 VAC
5500D-01-DC 606929 Single channel optical DO monitor; 12 VDC, power supply not included
5500D-02-AC 606925 Two channel optical DO monitor; 110-230 VAC
5500D-02-DC 606931 Two channel optical DO monitor; 12 VDC, power supply not included
5500D-04-AC 606927 Four channel optical DO monitor; 110-230 VAC
5500D-04-DC 606928 Four channel optical DO monitor; 12 VDC, power supply not included


4 timers - 10 events cascading events start/duration

4 feed timers (feeder not included); Feed Smart software manages feed delivery, user-selectable inputs for number of daily feedings, daily feed weights, total biomass, FCRS and parameter control

Temperature Operating Range -15 to +70°C (5 to 158°F); direct outside conditions with NEMA 4X enclosure
Communications RS485 and RS232 standard; Ethernet and wireless optional

1-4 DO probe inputs depending on model

4 user-configurable inputs for temp or (digital 0 to 1.0 VDC, 0 to 5.0 VDC or 4-20 mA) DO, pH, TGP, ORP, photo period, etc. (transmitter may be required)

2 user-configurable inputs (digital 0 to 1.0 VDC, 0 to 5.0 VDC or 4-20 mA) DO, pH, TGP, ORP, photo period, etc. (transmitter may be required)

Output Relays

8 each 10 amp 115 VAC (5 amp 230 VAC) relays for parameter, control and/or alarm

E-mail and/or SMS alarming up to 3 e-mails with Ethernet module or up to 10 e-mails with AquaManager

Software AquaManager®; Windows 2000/XP/Vista/Windows 7 operating systems
Memory/Logging Non-volatile; 2000 data, 1250 relay/alarm, 1000 entries/change and 500 GLP records
Warranty 2-years instrument, probe and cable; 1-year sensor cap (actual sensor life may be longer)
Display Back-lit graphic LCD (320 x 240) with timer, extended temperature range LCD
Ratings NEMA 4X, CE, ULC, CUL, ETL, RoHS, IP-65, Made in USA
Field Upgradeable Software Yes; flash based
Dimensions Height
Length Depth
6.5 in, 16.5 cm
8.5 in, 21.6 cm
4.75 in, 12.1 cm
Dimensions (optical sensor)



7.5 in, 19 cm

0.95 in, 2.4 cm


Option 1

Option 2

12 V DC; mobile live haul or anytime AC power not available

100-240 VAC; automatically switches to 12 VDC back-up with alarm if primary voltage drops

Range Resolution Accuracy
Dissolved Oxygen•
% Saturation
0 to 500% 0.1% air saturation 0 to 200%: ±1% of reading or ±1% air sat, whichever is greater;
200 to 500%: ±10% of reading
Dissolved Oxygen•
0 to 50 mg/L 0.01 mg/L or 0.1 mg/L (auto-scaling) 0 to 20 mg/L: ± 0.1 mg/L or ±1% of reading, whichever is greater;
20 to 50 mg/L: ±10% of reading
Temperature 0 to +45°C (32 to 113°F) 0.1°C ±0.2°C

Ordering Guide

Part Number Description
5500D-AC Single Channel Optical MultiDO monitor, 110-230 VAC
5500D-DC Single Channel Optical MultiDO monitor, 12 VDC, power supply not included
5500D-02-AC Two Channel Optical MultiDO monitor, 110-230 VAC
5500D-02-DC Two Channel Optical MultiDO monitor, 12 VDC, power supply not included
5500D-04-AC Four Channel Optical MultiDO monitor, 110-230 VAC
5500D-04-DC Four Channel Optical MultiDO monitor, 12 VDC, power supply not included
626250-1, 4, 10, 20, 30, 40, 50, 60 or 100 1-, 4-, 10-, 20-, 30-, 40-, 50-, 60- or 100-meter cable with optical DO probe/Temp
626320 Sensor Cap (included with initial cable/probe purchase)
5402 Serial to Ethernet Module
5285 RS232 Opto isolator
6505 Weather Shield
5209A AquaManager Desktop Software
6506 Desiccant Kit
6509 Rail Mount Kit
6510 Panel Mount Kit
606100 230 VAC cord, European
606101 230 VAC cord, UK
606102 230 VAC cord, Australia


YSI 5400 and 5500D User Manual

Specification Sheets

YSI Aquaculture M&C Expansion Modules

YSI 5500D Continuous Monitoring and Control Instrument for Optical Dissolved Oxygen

Catalogs & Brochures

Aquaculture Applications, Capabilities & Solutions

Español - Piscicultura Aplicaciones, Competencia y Soluciones

Aquaculture Monitoring & Control

Application Notes

NaturalShrimp Feeding Automation Increases Shrimp Production and Profits

Dissolved Oxygen Monitoring and Control in Shrimp Production with the YSI 5500D


Archived Webinar:
Webinar: Advancements in Aquaculture Monitoring & Control Systems

Original Broadcast: December 5, 2013 —2:00-2:30 p.m. EST

Join our free webinar!

Register now to join Tim Grooms and Darrin Honious for an informative overview of the YSI aquaculture monitoring and control system.

We will cover product advancements that improve system performance, productivity and efficiency.

Topics will include:
• optical based dissolved oxygen
• connectivity/networking options
• automated feeding with YSI Feed Smart
• data management with AquaManager and the AquaViewer App
• alarming options

Applications for M&C systems include tank-based/RAS commercial aquaculture, aquaculture research, live haul, public aquariums, algae culture and anyone interested in aquaculture monitoring and control technology to improve performance, productivity and efficiency.

The live webinar will be recorded and you will receive a link afterwards to view the recording.






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