5PCS SFM-27 DC 3-24V Alarm Siren Electronic Piezo Active Buzzer, 95dB High Decibel Continuous Beep Speaker for Arduino

I got these alarms for a project at work. The alarms function every time I needed them too. It was for a lockout tag out project.

Have used these on a couple projects. At 5V, these things are super loud and low power draw.Gotta have switches mounted for these.

I hooked the sirens up to a 9 volt battery and then a 12v car battery. I would say at best these alarms are 45db on a good day. You can easily have a normal volume spoken conversation with this alarm going off sitting on the table between two people.

Nice little low voltage buzzer, works with 5vdc to 24vdc.I use for an alarm notification.Would recommend this

The media could not be loaded. My greenhouse automation project uses an Arduino to detect sensor readings such as temperature, humidity, dry soil and many more parameters. When these go out of specification, I need an audible indication so I can go investigate and remediate the situation. I got the Stemedu five pack piezo active buzzers for the five different zones of my greenhouse. They are the right size and the sound like is perfect to catch my attention. They will help me make the greenhouse more efficient and productive.

High pitched loud tone. Perfect for alarms. Good price. Easy wiring.