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Multiparameter Monitoring and Control Instrument


Designed specifically for Aquaculture Systems, the YSI 5200A 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, pH, conductivity, ORP, salinity and temperature.

This product is RoHS Compliant
YSI 5200A Multiparameter Continuous Monitor and Control Instrument
Send me a Quote!

YSI Advancements in Monitoring & Control Technology Webinar 1213 from YSI

Find a Distributor

YSI has Authorized Distributors all over the globe. View a map and find your closest contact for YSI 5200A products and accessories.

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Get Support

Have a question about your YSI 5200A? Check out the support page with resources compiled just for you.

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Want to return a product for service? Here you'll find authorized service centers and instructions on how to send in your YSI 5200A.

Product Service

Engineered specifically for recirculating aquaculture systems, the YSI 5200A continuous monitor 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. Powerful enough to manage a full scale farming operation from anywhere in the world yet simple enough for anyone to use.

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.

  • Multiparameter monitor: DO, Temperature, Conductivity, pH, ORP, Salinity
  • Ethernet TCP/IP or wireless communications
  • Event logging records calibrations, high and low conditions and more
  • Conditional feed timer with Feed Smart software included
  • Networking capability up to 32 intruments per comm port or can be integrated with 5400 MultiDO monitors
  • Graphic, backlit LCD - quick, reliable system status checks
  • Plug-and-play...easy to install and maintain with user-scalability - no need to hire consultants
  • Flexible monitoring and control software
  • E-mail and SMS alarming

Feed Smart software manages food delivery based on user-selectable inputs to manage feed delivery based on number of daily feedings, daily feed weights, total biomass and FCRs, along with parameter control based on water quality values.  interfaces with most auto feeders.

AquaManager desktop software provides the ability to instantly see an overview of your facility, manage parameter set points, and conveniently manage data to make informed operation decisions.

If you're interested in a continuous monitor for disssolved oxygen, please visit the 5500D (optical dissolved oxygen) or 5400 (galvanic dissolved oxygen) page.




Two versions are available:

The 5200A-DC with and the 5200A-AC with
  • 12 VDC
  • Wall mount bracket
  • 100-240 VAC
  • Wall mount bracket
  • 115 VAC U.S. power supply



4 timers - 10 events cascading events start/duration

1 feed timer channel (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
-15 to +70°C (5 to 158°F); direct outside conditions with NEMA 4X enclosure
Communications RS-485 and RS-232 standard; Ethernet and wireless optional

DO, pH, ORP, conductivity, temperature

2 user-configurable inputs, digital (0 to 1.0 VDC, 0 to 5.0 VDC or 4-20 mA)

Output Relays

4 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; 1000 data, 1250 relay/alarm, 1000 entries/change and 500 GLP records
Warranty 2-years instrument; 1-year probes and cable
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

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%: ±2% or ±0.2 mg/L, whichever is greater;
200 to 500%: ±6% of reading
Dissolved Oxygen•
0 to 60 mg/L 0.01 mg/L (0-10 mg/L); 0.1 mg/L (10-60 mg/L) 0 to 20 mg/L: ± 0.2 mg/L or ±2% of reading, whichever is greater;
20 to 60 mg/L: ±6% of reading

0 to 200 µS;

0 to 2000 µS

0 to 20 mS;

0 to 200 mS

0.1 µS (0 to 200 µS range);

1 µS (0 to 2000 µS range);

0.01 mS (0 to 20 mS range);

0.1 mS (0 to 200 mS range)

(range dependent)

±0.5% of range (0 to 100 mS);

+1.0% of reading (100 to 200 mS)

Salinity 0 to 80 ppt (0 to 50 ppt when entered manually) 0.1 ppt ±2% or ±0.1 ppt,
whichever is greater
Temperature 0 to +45°C (32 to 113°F) 0.1°C ±0.2°C
pH 0.00 to 14.00 units 0.01 unit ±0.2 unit
ORP -2000 to +2000 mV 1 mV ±20 mV

Ordering Guide

Part Number Description
5200A-DC Multiparameter monitor, 12 VDC, power supply not included
5200A-AC Multiparameter monitor, 110-240 VAC, with 115 VAC US cord
5561-4, 10, 20, or 30 4-, 10-, 20-, or 30-meter cable with polarographic DO probe/Temp
5562-4, 10, or 20 4-, 10-, or 20-meter cable with polarographic DO probe/Temp/Conductivity/pH (order 5564 or 5565 separately)
5564 pH Sensor Kit (order calibration solutions separately)
5565 pH/ORP Sensor Kit (order calibration solutions separately)
5402 Serial to Ethernet Module
5204 DO Cap Membrane Kit, 2 Mil Polytetrafluoroethylene (6 caps with electrolyte)
5205 Probe Mounting Kit
5285 RS232 Opto isolator
5909 DO Cap Membrane Kit, 2 Mil PE (6 caps with electrolyte) 
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 5200A User Manual (8 MB)

Tips, FAQs & Guides

Feed Smart Feed Timer Overview

Specification Sheets

YSI Aquaculture M&C Expansion Modules

YSI 5400 Continuous MultiDO Monitor Specifications

YSI 5200A Continuous System Monitor Specifications

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

Water Monitoring Solutions

Application Notes

NaturalShrimp Feeding Automation Increases Shrimp Production and Profits

Compliance Certifications

YSI Instruments EPA Compliance Guide


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.


YSI 3682 Zobell ORP Calibration Solution

3682 Zobell ORP Calibration Solution

YSI 3682 Zobell solution is used for calibrating ORP/Redox on several YSI instruments.

YSI pH 4, 7 and 10 buffers

3824 Assorted pH Buffers Case

Various pH buffers for pH probe calibration.


5578 Power Supply for Aquaculture Monitors

5578 Power Supply for Aquaculture Monitors


5579 Power Supply for Aquaculture Monitors

5579 Power Supply for Aquaculture Monitors

YSI 5909 Screw-On Dissolved Oxygen Cap Membrane Kit

5909 DO Cap Membrane Kit

YSI 5909 screw-on cap dissolved oxygen membranes.


6505 Weather Shield

The 6505 is a rugged weather shield for the 5200A, 5400, and 5500 aquaculture monitors


6509 Rail Mount Kit

Mount the 5200A, 5400 or 5500 on a rail with the 6509 rail mount kit


6510 Panel Mount Kit

The 6510 panel mount kit allows for easy mounting of the 5200A, 5400 or 5500 to a flat surface

YSI Conductivity Solitions

Conductivity Calibration Solutions

NIST-traceable conductivity solutions to calibrate both field instruments and lab instruments and cells together for maximum





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