Invar leveling staff

Invar leveling staff

The ruler body of Invar leveling staff is made of aluminum alloy material. The appearance design ensure that it is not easy deformation in the process of using, and it is convenient for measurers to carry and measure;The ruler tape is made of 65 carbon steel. Specification of strip is 0.4×33mm.The coefficient of linear expansion of 65 carbon steel is (10.6~12.2)×10-6/0C/M (the national standard is（11.5±1.5）×10-6/0C/M). Because the coefficient of thermal expansion coefficient is small, and 3 kilograms force is added to the top, influence of the outside is minimal in the process of using to ensure the national three-grade-leveling measurement and four-grade-leveling measurement.

We can customize invar leveling staff according to customer requirements.

Centering rod

The figures and scale lines are carved on the rod through laser. The black substance produced through the chemical reaction of laser spectroscopy and aluminum makes the figures and scale lines clear, wearable and do not fade, bringing good observation effect for measurers. The scratching process (including zero setting) is fully automated, ensuring the accuracy of characterization. At present, we can produce 2m/3m/5m centering rod .Schematic diagram of characterization as follows.

Invar leveling staff

Centering rod