System has two strong spring anchors. These anchors will be installed in a 40mm to 50mm hole at two different heights with the help of installation tool. Each wire is attached with colored scale. The scale is having 3 color green, yellow & red radium stickers. The reference head is having water diverting hole to drain the water.
After installation of both anchors the anchor pipe assembly with spring will be inserted into hole leaving both the scale hanging one in each. When the bed /roof separation is taking place the reading will change in respective scale.