Test Strips for ammonia detection. Booklet of 54 ammonia test strips.Ammonia Test Strips DirectionsAmmonia leaks, even small ones, can be detected with the aid of these ammonia test strips. Moisten a strip of paper and pass it around the area in which the leak is suspected. If the paper comes in contact with ammonia, the paper will turn red. Coils submerged in water may be tested for leaks by dipping a strip of paper directly into the surrounding water. If ammonia is present in the water, the paper will turn red.