YSI 6155 Optical DO Membrane Kit

YSI 6155 Optical DO Membrane Kit


The YSI 6155 optical DO membrane kit is a replacement kit for the 6150 ROX optical dissolved oxygen sensor.


  • YSI recommends that membrane is replaced annually
  • YSI 6155 membrane can be replaced by the user
  • Includes tool for replacing membrane
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Note:  All optical DO membranes are now manufactured from anti-fouling copper alloy; these membranes directly replace black plastic membranes. Anti-fouling membranes can be used on existing ROX probes with no detrimental effects on data. The copper-alloy YSI 6155 optical DO membrane may arrive with surface patina and/or discoloration. This will not affect membrane performance.

What's Included:
  • (1) YSI 6155 optical DO membrane
  • (3) Installation screws
  • (1) Hex wrench
  • (1) Instruction sheet with calibration coefficients
Image Part # Product Description Price Stock Order
YSI 6155 Optical DO Membrane Kit 606155 6155 optical DO membrane kit
Usually ships in 3-5 days
Image Part # Product Description Price Stock Order
YSI 6150 ROX Dissolved Oxygen Sensor 606150 6150 ROX optical dissolved oxygen sensor with self-cleaning wiper Usually ships in 3-5 days

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Questions & Answers

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How do I replace the membrane?
The 6155 kit comes with everything required for installation. To replace the membrane, remove the old membrane and clean around the probe face. Make sure the surface under the membrane is clean and dry before replacing. After replacing the new membrane, power the sonde and enter the calibration constants (K numbers included with the membrane kit).

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