EXO Documentation

Knowledge Base

YSI EXO Water Quality Sondes X-Series Integration Guide


The YSI EXO Multiparameter Sondes can simultaneously measure multiple water quality parameters, including conductivity, temperature, pressure, dissolved oxygen, and many more. It easily integrates with NexSens X-Series data loggers using the SDI-12 sensor interface.

An illustration depicting how a sensor can be integrated with a NexSens X3 data logger for remote, real-time data access. A YSI EXO3 Multi-Parameter Water Quality Sonde is illustrated on the right with a line pointing to the left where an X3 is transmitting data waves to a cloud above which has a line to a phone screen on the far left which displays dissolved oxygen data on the screen in the WQData LIVE mobile app view.

Sensor Setup

Before the sensor can be deployed, it must first be set up through KOR software. For proper communication with NexSens loggers, users must set a Deployment Template on the sonde through the KOR software. Follow the manufacturer’s guidelines for setup.

Note: Be sure to note the parameter order in the Deployment Template, as this must align with selected parameters in the logger.

Caution: It is not recommended to install batteries or enable internal logging on the sonde. If internal logging is required, ensure the sonde is configured to use the Sample & Hold feature and output Battery Voltage so battery power can be monitored in real time.

 

Connecting with X-Series Loggers

Next, the sensor will need to be connected to the X-Series logger through CONNECT software. If you have not yet done so, set up the project in WQData LIVE.

  1. Connect the sensor using the supplied cable to one of the open sensor ports on the logger and note the port number.
  2. Plug the X3 into the USB port of the computer and power it on with the AC power cable.
  3. Open CONNECT and select the SENSOR tab.
    Open CONNECT and select the SENSOR tab.
  4. Click Add and select YSI from the Manufacturer drop-down. Then select the appropriate model.
  5. Adjust the SDI-12 address if needed and select the port number.
  6. Select either Continuous or Switch in the Power drop-down.
    1. Switch power is recommended for EXO sondes.
  7. Add or remove sensor parameters as needed. Note that the selected parameters must match the deployment template.
    YSI EXO sensor profile in NexSens CONNECT Software.
  8. Select Save Sensor Profile.
  9. Complete the setup for all other sensors, and then click Save.
  10. Name the Sensor Profile List and select Ok.
    Save Sensor Profile List.
  11. Complete system setup by clicking Deploy.
    CONNECT interface with a YSI EXO sonde added.
  12. Confirm that data is being transferred to WQData LIVE at the next interval (default is 10 minutes).

 

Mounting

Deployment setups will vary based on the platform, application, and site location. For general buoy mounting instructions and structure mounting, see below.

 

Buoy-Based Deployments

First, follow the appropriate User Guide in the Knowledge Base for buoy assembly. There are two options for near-surface measurements and a third option for water column measurements:

1. Buoy Deployment Pipe

Optional perforated deployment pipes can be fitted to most NexSens CB– and XB-series buoys. Deploying the sensor inside the pipe provides easy access for maintenance and recalibration.

A YSI EXO Sonde being lowered into a deployment pipe on a NexSens data buoy.

2. Cage Mount

Use the NexSens EXO Sonde Mooring Clamp Sets to attach the sonde to the instrument cage. Due to the differences in sonde diameter and length, cage clamp size and placement will vary. For clamp placement, see examples below.

Infographic for proper placement for the various YSI EXO sondes on NexSens instrument cages.

 

To attach the clamps to the cage, follow the instructions below.

  1. Secure the clamps on the cage using the included hardware.
    Secure the clamps on the NexSens instrument cage using the included hardware.
  2. Slide the o-rings onto the sonde body, and align them with the clamps on the cage.
    Slide the o-rings onto the sonde body, and align them with the clamps on the cage.
  3. Adjust the o-rings as needed, then close and secure the clamps.
    Note: depending on the deployment site, users may want to provide additional stability to the sonde.
    Adjust the o-rings as needed, then close and secure the clamps.

3. Water Column

For water column measurement, use the NexSens EXO Sonde Mooring Cages to attach the sonde to a mooring line at the desired depth in the water column.

  1. Shackle the sonde mooring cage to the bottom of the sensor line at the desired depth.
    Shackle the sonde mooring cage to the bottom of the sensor line at the desired depth.
  2. Repeat as desired.
    NexSens data buoy with three YSI EXO sondes deployed at various depths.

 

Shore-Based Deployments

For dock, pier, or bank deployments, it’s best to secure the sensor in a perforated PVC pipe.

  1. Extend the pipe into the water and deploy the sensor.
    Extend the pipe into the water and deploy the YI EXO Sonde.