Ultrasonic transducer: 100KHz transceiver integrated;Measuring range: 0-1000mm;Blind area: 15mm;Protection class IP68;Stainless steel housing;Another 1100mm PVC pipe with an outer diameter of 75 can be fitted on site. Pay attention to the 45 diagonal cut at the bottom and the opening channel.Output: 4G or NB-1OT wireless communication;Built-in integrated special antenna;Easy to replace battery, reduce operation and maintenance costs;Built-in 19000×2 mah /3.6VDC battery,Battery life: Under the condition of 5-minute test and transmission, the NB-10T is 20 months, and the 4G is 6 months.