DC type piezoelectric buzzer for security door alarming Φ23*12mm

Description:

A buzzer can be either AC or DC operated and can be mounted anywhere according to the need and purpose. When used as an alarm device, the buzzer is usually mounted on a control panel. The latest technological developments have led to using buzzers in sirens and signals for a wide range of applications.

The piezo electric emits a high-pitch beep that is sure to capture everyone’s attention! To use them, you’ll need to match the wire colors to the wires from the battery pack. If the volume is too loud, simply use a piece of tape over the top hole on the buzzer and the volume will substantially lower.

Feature:

• High-performance buzzers that employ unimorph piezoelectric elements and are designed for easy incorporation into various circuits.
• Because these buzzers are designed for external excitation, the same part can serve as both a musical tone oscillator and a buzzer.
• They can be used with automated inserters.Moisture-resistant models are also available. The lead wire type with both-sided adhesive tape installed easily is prepared.

Application:

Electric ranges, washing machines, computer terminals, various devices that require speech synthesis output.

Specifications:

Difference between piezo buzzer & magnetic buzzer:

A piezo buzzer generates sound because of the piezoelectric effect from the piezoelectric ceramic which drives the metallic diaphragm to vibrate.

A magnetic buzzer is based on the electromagnetic principle, the metal diaphragm is pulled when input the power, and spring back without power.

The piezo buzzer is driven by square waves, and the magnetic buzzer needs 1/2 square waves to drive.

We suggest inputting higher voltage for a piezo buzzer, normally over 9V to have enough SPL. On the other hand, a magnetic buzzer can be driven to generate 85 dB by only 1.5V, but the consumption of the current will be much higher than Piezo one.

To compare the two types of buzzers, the magnetic type can have lower frequency response with the same dimension.

Though being limited by the dimension, the SPL of a magnetic buzzer can only reach to 90 dB. The piezo buzzer can achieve the SPL of 120 dB in some spec., some larger size can also easily reach to 100 dB.

Dimension: (mm)

Tolerance: ±0.5

Continuous tone

Frequency response: