Question

what is the checimal inside sprinkler name​

Answer 1

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glycerin

When a sprinkler head has a glass bulb, that bulb typically contains a glycerin-based liquid. Once the air around the sprinkler reaches a certain temperature – often 155F or 200F (68C or 93C) – the liquid expands which causes the glass to break.

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Answer 2

It called as Glycerin

In some sprinklers, the plug is made of an alloy called Wood's metal, a mixture of bismuth, lead, tin, and cadmium that melts at a relatively low temperature. In other sprinklers, the plug is a small glass bulb full of a glycerin-based liquid designed to expand and shatter when it gets hot.

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