Ray alarms we offer are functional as the infrared beam detectors. They can overcome the intrinsic problem of IR detectors. The provided alarms can perform the long-distance detection. Supplied alarms are included with photo-transistor and perform the precise detection. Ray alarms are accessible with a special design. The sensor of the provided devices can function as the hot ionization gauge. They are accessible with high functionality and enhanced functional precision. The said products are provided with alarm frequency double tips and liquid crystal radiation display bar. We provide these alarms at cost-effective rates. These alarms of high sensitivity have reliable and stable operation.