Ysi Aquaculture Continuous Controllers for Water Quality & Facility Control

October 11, 2019

The YSI Aquaculture continuous controllers range includes the YSI 5200A, 5400 and 5500D. This range allows full monitoring and control of your aquaculture system either recirculating or pond culture.

Additionally the YSI IOEM (input/output expansion module) and the YSI REM (relay expansion module) allow even further customisation.

Furthermore, utilising the IOEM and REM, monitoring of parameters and switching of components is possible with complete flexibility for almost every system design.

The YSI IOEM makes expansion and customisation possible with either 4 input or 8 input options. As a result a central control system of either a 5200A, 5400 or 5500D can include an IOEM module that can be configured and therefore accept either inputs or outputs from 3rd party sensors or control devices such as flow switches, level switches, pressure switches etc.

The additional inputs in the IOEM can be used for temperature, analog (0 to 1.0 VDC, 0 to 5.0 VDC or 4-20 mA) or digital sensors, output can also be used to control devices.

All while being able to be linked back to a SCADA or PLC system.

You can then utilise the REM module to switch the devices you need to control.


The 5200A is the flagship of the continuous monitor range. It is a multiparameter monitor allowing monitoring of pH, conductivity (salinity and TDS also), temperature, pH and ORP. It also has inputs for 0 to 1.0 VDC, 0 to 5.0 VDC or 4-20 mA where 3rd party sensors such as TGP can be utilised.


The 5400 is a 4 channel DO monitor. It uses galvanic oxygen probes, and has an additional 6 user configurable inputs for 3rd party sensors 0 to 1.0 VDC, 0 to 5.0 VDC or 4-20 mA.


The 5500D is available as a 1-4 channel DO monitor using optical oxygen probes, and has an additional 6 user configurable inputs for 3rd party sensors 0 to 1.0 VDC, 0 to 5.0 VDC or 4-20 mA.

Ysi Aquaculture Continuous Controllers – Ioem Module and 3rd Party Sensors

The additional third party probes could be monitoring a range of parameters. Parameters including but not limited to, DO, Conductivity (salinity, TDS), pH, ORP, Temperature, TGP, Turbidity, BOD, Chlorine, TSS and a range of other Ion selective electrodes.

With the flexibility of inputs in the base monitors and the addition of the IOEM and REM modules, monitor and control of your facility is easier than ever before.

Additional Features

This is just the beginning of the features in the YSI continuous monitors. Other features included in the YSI Continuous monitors are:

  • Event timers
  • Feed timers
  • Internal 10 amp relays

The feed timers integrate with YSI’s feedsmart software for monitoring and control of feeding to the system.

All these features contribute to making these monitors incredibly flexible and powerful straight out of the box.

Addionally the power of the Aquamanager software and Aquaveiwer 2 APP allow for control, alarming and data acquisition.

Operators now have the ability to completely monitor and control their facilities with a fully integrated system.

Contact us today to explore the possibilities that YSI continuous monitors can provide.

For more information you can visit the YSI links below: