HUM-ID Identify Humidity - with the new HUM-ID App 4.0 and the HUM-ID reader for your smartphone, you can check moisture and standing water in no time at all. The HUM-ID extension is compatible with all current smartphones and can be easily connected to the smartphone via Bluetooth. In the test mode, HUM-ID sensors can be checked individually. If you want to control project sensors, select "Projects", upload a plan or a photo of the area and start the sensor control. You can mark wet sensors in the plan with a tap.