Water Level Sensor Module 2PCS Rain Water Level Liquid Surface Height Depth Detection Sensor Module for Arduino Raspberry Pi electronics3 you can install the o-rings

you can install the o-rings as needed

They have good electrical resistance

press the connector clamp into the tube with thumb

MATERIAL--UHF SO-239 male attach-type connectors for LMR400/KMR400/RG8/RG8U/Belden 9913/7D-FB/ RG213 Coaxial Cable

Water Level Sensor Module 2PCS Rain Water Level Liquid Surface Height Depth Detection Sensor Module for Arduino Raspberry Pi electronics3 you can install the o-ringsWater Level Sensor Module 2PCS Rain Water Level Liquid Surface Height Depth Detection Sensor Module for Arduino Raspberry Pi Specifications: Product Name: Water Level Sensor Working Voltage: DC3 5V Working Current: less than 20mA Sensor Type: Analog Detection Area: 40x16mm 1. 57x0. 63Inch Processing Technology: FR4 double sided tin spray Working Temperature: 10 30 Degree Centigrade Working Humidity: 10% 90% non condensing Size: 62x20x8mm 2. 44x0.