NexSens EXO Sonde Mooring Cages

The NexSens EXO Sonde Mooring Cages provide a secure and convenient means of deploying a YSI EXO multi-parameter water quality sonde.


  • Integrated mooring clamps sized specifically for EXO sondes
  • Hinged pin design allows for quick clamping and release
  • Rugged stainless steel frame and PVC clamp construction

The NexSens EXO Sonde Mooring Cages provide a secure and convenient means of deploying a YSI EXO multi-parameter water quality sonde. The cage features a 316 stainless steel construction with top and bottom 3/4" eyenuts. The convenient eyenut connection allows the cage to be deployed in-line on an open water buoy mooring or mounted horizontally on a riverbed.

Two integrated PVC mooring clamps are designed specifically for the diameter of a YSI EXO1,  EXO2 or EXO3 sonde. Each clamp features a hinged pin design for quick clamping and release. The clamps are positioned at the optimal clamp areas of an EXO sonde so as not to deform the instrument.

An optional mounting crossarm is available for adding photosynthetically active radiation (PAR) sensors. The crossarm allows for both upwelling and downwelling sensors with optional anti-fouling wipers. For saltwater applications, sacrificial zinc shaft anodes are available to attach to the cage and mitigate corrosion during long-term deployments.

  • Dimensions: 42" long, 12" diameter
  • Weight: 16 lbs.
  • Material: 316 SS frame, 316 SS eyenuts, PVC clamps
  • Mooring Attachments: (2) 3/4” eyenuts
Questions & Answers
Do the clamps keep the sonde in place well?
Yes, although additional measures, found in this guide, can ensure a more secure hold. 
What additional items do I need to secure the cage in a river bed?
When mooring horizontally in a river, we recommend driving horseshoe stakes into the bed with one end through the mooring eye holes.
Can the cage be mounted below another cage on a larger buoy platform?
Yes, the instrument cages can be attached together using a center bolt with castle nut and CB-CCA anti-rotation collar:
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