Clinometer for inclination and gradient measurements. Aluminium plate 13 x 13 cm with a rotating circular disc out of Acrylic Glass and an attached leak-proof horizontal level. Clamp with a knurled screw for fixation of the circular disc. Three different measurements: 1) 4x angle degrees 90° : 0,5° 2) 2x per cent inclination 0-100% 3) Inclination ratio 10:1, 5:1, 4:1, 3:1, 2:1, 3:2, 1:1, 2:3, 1:2, 1:3, 1:4, 1:5, 1:10 Mounted on an anodized aluminium-rectangle-pipe profile (100 x 5 x 2,3 cm)