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Do not use this product in an atmosphere containing chlorine gas, sulfurizing gas, acid, or another corrosive substances.
This may cause the characteristics of the product to deteriorate, and also reduce the sound volume level or prevent the emission of any sound at all.
The silver electrode of the piezoelectric diaphragm will sulfurize, resulting in the formation of silver sulfide. Because silver sulfide does not conduct electricity, an open circuit condition is likely to occur.
Sulfidation : H2S + Ag → Ag2S + H2
The electrode has turned blackdue to sulfidation.