Based on this product's specifications, here are some alternatives and similar models
Door/Window Sensor Eaton CSEZ-01/25
Summary description:
The Eaton CSEZ-01/25 is a wired door/window sensor designed for reliable security. With a compact size of 50mm width, 70mm depth, and 10mm height, it fits seamlessly into any window frame. It complies with RoHS standards, ensuring environmental safety. Ideal for enhancing home security, this sensor is easy to install and provides consistent performance.