Based on this product's specifications, here are some alternatives and similar models
Gas Detector SAFE HOME SAFE808 Propane
Summary description:
The SAFE HOME SAFE808 gas detector is designed for propane detection in homes. It features an 85 dB alarm, LCD display, and LED indicators for alerts. Powered by AC and battery, it operates at 230 V with a frequency of 50-60 Hz. Compact dimensions of 112 mm width, 42 mm depth, and 73 mm height make it easy to install. Ideal for ensuring safety against gas leaks.