Measures varying angles & gradients. Useful scales for ease of use. Pocket sized for convenience. HOW TO READ THE AIR BUBBLE The size of the air bubble will vary greatly depending on the temperature. When measuring horizontally or vertically 45˚ / 60˚ Measuring is carried out from the center of the air bubble between the right and left markers. Measuring 1/100 and 2/100 gradients As shown in the diagram, when the air bubble is in the center of the right and left markers, make a space between the markers of each gradient and measure the space of the gap between the air bubble and the markers. SPECIFICATIONS ·Measuring scope: Horizontal, Vertical, Gradient 45˚/60˚ ·Fitted with easy reading scale ·Acrylic resin SENSITIVITY / ACCURACY Sensitivity: 0.50mm/m=0.0286˚ Accuracy: Within ±2.50mm/m=±0.1432