Alarm sensor

Submitted on January 31, 2022 | John Adams
After reading about RFI immunity features in sensor specifications, I understand these designs are resistant to rouge wireless signals but still don’t understand how these signals would impact on an alarm sensor. A: If powerful radio waves propagate onto electronic...
Submitted on April 19, 2021 | John Adams
Could you please tell us who made this old alarm sensor? It’s part of an alarm system that was professionally installed and we’ve debated whether to leave it in place after a panel upgrade. A: It’s late 1980s, early SMD,...
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