Detection Of Sulphur Dioxide Leakage
For the detection of sulphur dioxide ammonia leaks swab can be used. The swab is made by soaking with a sponge or cloth, tied to a stick or a piece of wire in the ammonia. Household ammonia can also be used. Thick white smoke forms when ammonia is in contact with sulfur dioxide. The usual soap bubble or oil test can be used when there is no ammonia.
If ammonia is used, check for leakage in the following ways:
Burn sulfur stick in the vicinity of the leak. If there is a leak, thick white smoke will be made. The stronger leakage, more dense white smoke.
To wet litmus paper near the suspected leak region. If there is a leak, ammonia will cause the litmus paper to change the color.
Refrigerants, which halogenated hydrocarbons (CFCs connection) can be checked for leakage with DRI tightness. This involves holding a torch flame or near the leak area. If there is leakage of the refrigerant, the flame will light green. In any case, the room should be well ventilated, when the torch test.
Currently available electronic detector for such leakage of refrigerant.
Detector gives rise to a series of quick clicks if the refrigerant is present. The higher the concentrations of refrigerant, faster clicks (see Fig. 5-5).