Features: 1) Encapsulation: firm plastic or aluminum 2) Multilayer matching layer technology 3) Installation cap: M32 stainless steel nut 4) Cable (m): 8 5) Weight (kg): 0.9 6) Functions: a) Level measurement b) Proximity measurement c) Obstacle avoidance d) Traffic control Specifications: Best operating frequency: 40kHZ Minimum transmitting sensitivity: 110dB Minimum receiving sensitivity: -160dB Minimum blind zone distance: 40cm Maximum usable range: 15m Maximum drive voltage: 1,800vpp Weight: 0.56kg