can i use arduino nano in environment has temperature about 60 degree C and high humidity ?
Have you tried Googling this problem?
A simple search on Google suggests that the ATmega328 can operate up to 85 degrees Celsius.
As for the humidity, I would recommend some sort of airtight enclosure for the Arduino just for safety.
Hope that helps.
About the humidity:
- " Watertight means that the water in the device can not get out"
If you are not making it work under surface, you better make it air- or watertight.
If you are goinging to make it work at sea, you first make a cell as tight as you can with no seams in the upper parts of it. Then you drill 3mm hole in the bottom of it and insert a loose wool thread in the hole. The thread inhibits insects coming in but it lets the water come out. The insects do not harm devices with no moving parts, but dead insects can clog the hole.
Every device collects humidity in the closed box through the plastic walls. The humidity condensates to water.
I have opened many boating instruments, even Mil standard, which are sold as watertight. Most of them have gone east because of the condensed water.
All low voltage devices tolerate rain- and lakewater, but not seawater.
If you want it to last then you will need to do something about the humidity. You also need to avoid the moisture condensing out if the temperature drops.
However once you put it in an enclosure the temperature is going to rise and the 20Deg between ambient and th emax operating temperature is not a lot. Any enclosure should conduct away heat.
Anyone have a definition of 'high humidity' ? is that really high, like 60% ? or is high mean 99.9%
in the case of 60deg C, as it cools, it will drop under the dew point really fast.
at 25% RH at 60C, when the temp drops to around 26C, it will be well below the dew point.
As the others have warned, you need to address the environmental concerns.
air exchange may be all that you need to do.