Piezoelectric Pulse Sensor (Seeed SEN42758M)

http://garden.seeedstudio.com/index.php?title=Piezoelectric_pulse_sensor

It is a long life piezoelectric pulse sensor with signal filtering, conditioning and temperature compensation circuit. The high integration makes it very stable, reliable and extremely easy to use. It outputs the pulse wave which is voltage analog signal. It could be used in pulse wave analysis system, and even the Arduino based system.

Features

Output analog voltage signal

High-fidelity, low-impedance audio signal

High integration, reliability

Overload range 100 times

Anti-jamming design

Application Ideas

Heart-sound signal acquisition

Fetal-audio signal acquisition

other surface-tone signal acquisition