1. Specifically what are you trying to protect with the pendant sprinkler? Knowing the target (people, property, valuables) will help me focus on the relevant protective features.
2. What kind of threats are you trying to protect against? Is it fire, heat, smoke, water damage, or something else?
3. What do you mean by “long term”? Are you looking for sprinklers with durability, corrosion resistance, or specific longevity requirements?

Once I have a better understanding of your context and needs, I can explain how pendant sprinklers protect in the long term, including their specific features and benefits.

Additionally, if you have any specific models or brands of pendant sprinklers in mind, feel free to mention them for even more targeted information. ₹215/piece