Doorbell lower frequency external trigger piezo sound sensor
Code: 433TPZD
£8.40
(£7.00
ex VAT)
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VAT
EOL - max 4 available
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Description
Doorbell lower frequency sound external trigger piezo sound sensor for PTU.
More suited to the frequencies generated by equipment such as modern telephone systems and fire alarm electronic sirens.
Doorbell piezos are identified by a blue sleeve on the lead.
Only suitable for use with doorbell trigger units.
