Your Philips Humidifier is equipped with a built-in humidity sensor. Please follow the steps below to check the humidity sensor:
Remove the cover of the air quality/humidity sensors of your Philips Humidifier and then gently blow moist air into the humidity sensor at the back of your humidifier (please see the image below).
After a few seconds, the "current humidity" indication of your humidifier should change in the centre of the control panel on the top of the device.
Note:
If the initial "current humidity" indication of your humidifier is already 60%, the indication cannot show an even higher humidity level when you blow moist air towards the sensor.
