EM400-UDL-868M-W100 - Ultrasonic Distance SensorEM400 UDL is a non contact ultrasonic distance sensor designed for outdoor applications such as monitoring water level, fill level of tanks and silos, presence of objects, or snow level. It features multiple selective probes with varying detecting ranges to meet diverse requirements. With high protection IP rating and waterproof enclosure, EM400 UDL can withstand harsh environments, and it can work up to 10 years with two 9000 mAh batteries. The