I have this special information which most of us tend to take it for granted.
When you activate your humidifiers using those auto humidity sensor please be careful.
I never experience this before however a blog reader called me to supply him the gadget.
What happened to him was that the sensor have difficulties to stop the humidifier even though the setting were correct.
You can imagine what happen next if your humidifier continue to run 24 hours a day.
All your nesting planks will be soon covered with those fungus.
They say that if that happen you need to forget about swiftlet farming but call yourself mushroom breeder.
I was a bit out of track and could not help him much until he called someone who happen to be the supplier of the sensor device.
According to the supplier if you put the sensor too closed to the humidifier the sensor tip will be wet and it will no longer able to provide the right signal to your controller.
To avoid this kind of error reading you need to place the sensor at least 8-10 feet away from where you place those humidifiers.
The problem that we always has is that the electrical cable from the humidifier is too short and usually not more than 5 feet.
What you need to do is to use the sensor's wire to the maximum.
Usually these sensors comes with 10-15 feet cables.
You must also hang the sensor not too closed to the floor and at the same time not to high from the floor.
My advise is to place it at around 5-6 feet above the floor and 10 feet away from the nearest humidifier.
Be careful not to turn your BH into a mushroom plantation.
Best of luck to all of you out there.