You should also consider the sensitivity of the movement sensor: the part of the alarm that detects whether your bike is being meddled with or not.

The smart water controller for metro water supply lines described in this work makes use of a relay, an ultrasonic sensor, a flow sensor, a solenoid valve, GPS, and GSM. The planned system is intended ...

A flexible and wearable ultrasonic sensor (WUS) constructed from a piezoelectric polymer film has been proposed for long-term continuous monitoring of the artery motion. The non-focused plane-wave ...