Handling Invisible character in a file

Hi Experts,
When i am trying to read a csv file ,i could find some invisible character in it.
I tried to see those characters by following code

od -c filename

It is displaying 240 for those invisible character.

can some one elobrate on this and provide solution remove those character from file.

sed "s/$(printf "\240")//g" file

Hi,
Can you let me know what does 240 implies?

It is extended ascii so it can have all kinds of meanings, depending on the original ASCII extended character set. 240 octal = ascii 160 decimal, which may have had the meaning of a non-breaking space.... So if that was the case then it is maybe best to replace it with a regular space:

sed "s/$(printf "\240")/ /g" file

Hi,
Is there any other character which also results in non-breaking space similar to \240