Manufacturer of water and leak detection equipment, zoned water leak detection systems, and perimeter leak monitoring equipment.Water Leak Detection Equipment From Dorlen Products Early Warning Water Leak Detection Equipment For Commercial and Industrial Applications. Water Alert Sensor Cable Ceiling Guard About Dorlen Specifications Catalog/Price List Dorlen Products Inc. has supplied companies with simple and reliable water leak detection equipment / water leak detection systems since 1975. Dorlen Mfg's 3 main product lines, Water Alert, Water Alert Sensor Cable and Ceiling Guard. All of our