Accurate Invar Leveling Staff

Adopting the superior quality aluminum alloy and formed-in-one piece technology, having less distortion, higher intensity and lighter weight, being resistant to water, dryness, vibration and shock, this staff can take on the first-grade land surveying, which is made exactitudely as the current international standard, applied under any climate and regional environmental conditions.
Notes:A variety of the grades, length, and bodies of the bar code leveling staffs are variable of the customer's demand, all of which can be used with all kinds of digital water levels.

The principal technical specifications:
This staff adopt CH8008-92 invar belt 4J36 standard.Coefficient of line expansion:≤1.3×10-6/degree;Difference between real length and nominal length per meter:≤±0.02mm;Difference of average real length between the scale Spaces in meter:≤0.008mm;Difference between the scale space in decimeter:≤0.01mm;Difference between basic constant and assistant constant and the null point difference of the staff:≤0.015mm;Angle between the axis and the bottom plane:≤4';Smooth degree of the bottom plane:≤0.015mm;The degree of curve of the staff:≤2mm.Our staff has dual measuring scales, one is in 10mm instrument and the other is in 5mm instrument.Our leveling staff has two imagines.One is erect image and the other is inverted image.