What is a common method to detect small leaks in an Ammonia system?

The method to detect small leaks in an ammonia refrigeration system that stands out is the use of a sulfur stick. Sulfur sticks emit hydrogen sulfide gas when burned, producing a distinct odor that can be useful for identifying ammonia leaks. Since ammonia has a strong, pungent smell, the presence of hydrogen sulfide provides a convenient way to ascertain whether a leak is occurring.

Thermal imaging, ultrasonic detection, and smoke tests are also valid techniques for leak detection in various contexts. However, they are not as commonly associated with small ammonia leaks. For example, thermal imaging can identify temperature discrepancies associated with leaks but may not be sensitive enough to detect minor ammonia escapes. Similarly, ultrasonic detection relies on the sound of gas escaping, which can often be challenging to isolate from background noise. A smoke test is generally used to visualize airflow and leak paths but is less effective in identifying specific gas leak locations.

Utilizing sulfur sticks remains a straightforward and effective method for leak detection, especially in environments where ammonia is handled, courtesy of the recognizable odor for which ammonia is known.