Yes. Here are some resources for making iButton
data loggers (Thermochrons) waterproof and/or using them in water or liquid monitoring applications:
- Maxim manufactures the DS9107 "iButton Capsule". The iButton Capsule is a mechanical enclosure to protect Temperature Logger iButtons (DS1921, DS1922, and DS1925 series) from moisture, solvents and pressure. It provides IP68 protection. More info can be found here: https://www.analog.com/en/products/ds9107.html
- Homechip sells several waterproofing enclosures for iButton data loggers, including: 1 sinking silicon Thermochron enclosure, 1 floating silicon enclosure, and 1 aluminum half-enclosure: https://homechip.com/search?type=product&q=data+logger+enclosure
- For Do-It-Yourself (DIY) waterproofing Thermochron solutions, there has been a published study on the efficacy of coating iButton devices with clear plastic dip: https://www.researchgate.net/publication/257160340_Does_waterproofing_Thermochron_iButton_dataloggers_influence_temperature_readings