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Built-in operating buzzer
When it comes to measuring the gas in ppm the analog pin has to be used
Totally lead free
Bluetooth core V2
They are often referred to as PIR
Magnetic Sensor Module 74151 Built-in operating buzzerIntroduction : Magnetic Sensor module is based on encapsulated dry reed switch CT10. CT10 is single pole, single throw (SPST) type, having normally open ruthenium contacts. The sensor is a double ended type and may be actuated with an electromagnet,a permanent magnet or a combination of both. The magnetic switch is a wonderful tool for designers who would like to turn a circuit on and off based on proximity. Applications : Medical applications.
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