To measure area of abnormiry figure quickly, used in agriculture,forestry, geology, water conservancy, city planning, land survey. It is in common use to measure area.
Digital planimeter Model QCJ-2000

Measure area 300mm in width unlimited length
Relative error ≤±0.2%
Display 16 digits LCD
Voltage inner with DC6V
Weight 1.25kg
Size 260×180×40(mm)