Great Lakes Marine Technologists (GLM Tech)

Zebra tech
https://www.fondriest.com/zebra-tech-da ... -wiper.htm

PME
https://www.pme.com/products/wiper

Has anyone used other options?

Use both PME and ZebraTech - moreso the latter. We also have some projects using UV light for biofouling. NSF OOI has been doing this for years: https://www.aquaticsensors.com/product/ ... ng-lights/

Thanks for sending that info on the UV anti-fouling light! I had not heard of this before, very cool idea.

This aquaticsensors company is also one I had not heard of before.

In-Situ Troll sondes can have a central wiper which works quite well.
https://in-situ.com/en/products/water-q ... ter-sondes