Based on our enhanced quality and customer satisfaction, Flowline now offers a free optional 1-year warranty extension on its non-contact ultrasonic level products that increases the warranty period on such products for a period, which is equal to the shorter of two years from the date of purchase or three years from the date of manufacture. To receive the extended warranty, the original purchaser must register their qualifying product within thirty (30) days of purchase by providing their valid part number, serial number, name, company and email address. An extended warranty registration receipt will be emailed to you for reference at the time of claim. Please refer to the below list of qualifying products.