The LPU-2127 is a non-contact, ultrasonic sensor used for measuring liquids in tanks up to 25 feet tall. This sensor was specially designed for easy setup with an integrated keypad and LCD display built into the unit. Programming is done entirely through the integrated keypad - no extra display modules, input devices, or computer needed. Plus, it is loop powered, making it fast and simple to wire. This sensor features CSA Class 1, Div 2 harzardous location approvals making it suitable for many operations. Its housing is highly durable with high chemical compatiblity, so it performs under stress in a wide range of liquids.The LPU-2127 offers simplicity, durability and it is virtually maintenance-free for years of dependable operation.