Aqua-Scanner SHT 5020 The Aqua Scanner SHT 5020 is a 2 meter long sensor (can be extended on request) that reacts sensitively to individual drops of water along its entire length. The mechanically strong cable, resistant to corrosion and abrasion, consists of two sensor wires embedded in a fluoropolymer carrier rod. Thanks to the robust cable construction with conductive polymer technology and fluoropolymer construction detection, no metal is exposed. For cleaning, you can wipe it with a clean damp cloth.