Smart Sauna Sensor by Harvia

The Smart Sauna Sensor by Harvia turns any sauna, even a wood-heated one, into a smart sauna. Mounted in minutes and paired wirelessly with the free MyHarvia app, it delivers real-time temperature, humidity, and usage data, then lets you know the moment your sauna's ready. Wood-burning users get a signal for exactly when to add more firewood, while built-in usage data helps you fine-tune energy use, maintenance, and stone replacement over time. It's a small upgrade that makes every sauna simpler to run and easier to enjoy.