No, the devices are not waterproof.
The Orbit devices have been designed to be compact, with a nice design, that fits most industrial environments, but are not designed for submersion into water or outdoor use without cover.
The Orbit 3 has a humidity sensor with a IP67 filter membrane, but the device itself is not IP67 rated. However, the Orbit 3 works well for e.g. temperature monitoring of fridges and cold storage for the food and retail industry.
The Orbit K can be placed inside our tough box, which makes it waterproof and more durable, for harder industrial applications like concrete monitoring at a construction site.