27mm Piezoelectric Disc – Piezo Ceramic Transducer & Sound Sensor

The 27mm Piezoelectric Disc is a highly sensitive piezoelectric ceramic element designed for sound generation, vibration sensing, and acoustic measurement in electronics projects. Operating on the piezoelectric effect, it can act as a lightweight buzzer element or convert physical vibrations and impacts into measurable voltage signals, making it a versatile component for electronic musical instruments, touch sensors, and alarm systems.

Key Features

• Standard 27mm outer diameter brass disc
• High-sensitivity piezoelectric ceramic element
• Dual-function: acts as both sound generator and vibration sensor
• Low power consumption and high energy conversion efficiency
• Ultra-thin, lightweight, and compact design
• Wide frequency response for clear tone generation
• Easy to integrate into acoustic chambers or surface mounts
• Reliable performance for DIY electronics and commercial applications

Technical Specifications

Applications

• Acoustic pickups for acoustic guitars, drums, and folk instruments
• Electronic buzzers, alarms, and notification sounders
• Vibration and knock sensors for microcontrollers (Arduino, Raspberry Pi)
• Touch-sensitive buttons and impact detection devices
• Ultrasonic and medical acoustic sensing equipment
• DIY electronic drum pads and MIDI triggers

Important Notes

• Handle with care to prevent cracking the brittle ceramic coating on the disc.
• Use fine-tip, low-temperature soldering irons when attaching wires directly to the ceramic layer.
• When using as a sensor with microcontrollers, use a high-value parallel resistor (e.g., 1MΩ) to prevent high-voltage spikes.
• For optimal sound output, mount the disc inside a tuned acoustic resonant cavity.
• Avoid exposing the disc to extreme mechanical stress or temperatures exceeding maximum ratings.