Product Introduction

The DY-SDJ Grade 3 Metal Line Rule is a metal straight rule equipped with a magnifying lens for reading and a thermometer. It is commonly used in surveying operations to check distances between map points, control points, and coordinate points. It is specified as a standard rule for calibrating leveling rods in national leveling measurement specifications. It is also widely used by other professional departments for measuring and计量ing linear distances and markings.

The third-grade metal wire rule, as a high-tech, innovative new product of the 21st century with independent intellectual property rights of China, integrates modern technology and fully automated production process technology. It employs laser engraving for the lines, marked readings, and graphics. The product features high precision, stability, and clarity, with consistent line width and spacing, linearly varying values with no sudden jumps or random peak-valley errors. The lines are perpendicular to the standard, the rule body has good rigidity, low deformation rate, and excellent flatness. All precision indicators are significantly higher than the JJG71-2005 standard promulgated in 2005, positioning it at a world-leading level.

Technical Specifications

1. Instrument dimensions: Length 1050mm x Width 38mm x Height 63mm

2. Instrument Weight: 3 Kg

3. Wood Box Dimensions: 1080mm (Length) x 74mm (Width) x 82mm (Height)

4. Total Weight: Approximately 5.5 Kg

5. Ruler graduation length: 1020mm

6. Graduation of the ruler: Each of the two faces has a graduation of 1mm and 0.2mm (with an estimation up to 0.01mm).

7. Magnifying Glass Magnification: 7x

8. Thermometer graduation: 0.5 degrees

9. The irregularity of the bevel edge of the ruler is ≤0.1.