Subject ASCII values

I have a column char(2) where two ASCII values stored. For example 00000011, 00000001 are stored as (3,1).
When I do a select I dont get any result because the result is not alphanumeric. 3 is ETX and 1 is NUL.
I can get the values programmatically but I want to do bit comparison with sql query.
Anyone might know how?

Hugo Larson