What instruments are used to measure length?

Instruments for measuring length include:

1. Vernier caliper

A measuring tool for measuring length, internal and external diameter, and depth. A vernier caliper consists of a main ruler and a sliding vernier attached to the main ruler. The main ruler is usually measured in millimeters, while the vernier scale has 10, 20 or 50 divisions.

2. Scale

Using the length unit as the standard to make scale marks, it is a tool for measuring the length of objects. The graduation value of the scale is generally 1mm, and the general student measuring range is 10cm. , 15cm, 20cm.

3. Tape measure

A commonly used measuring tool in daily life. What everyone often sees is the steel tape measure, which is commonly used in construction and decoration, and is also one of the essential tools for the home. Divided into fiber tape measure, tape measure, waist measurement, etc. Luban ruler, Feng shui ruler and Wen meter ruler are also steel tape measures.

4. Laser range finder

An instrument that uses a certain parameter of modulated laser to measure the distance to a target. The measurement range of the laser rangefinder is 3.5~5000 meters.

5. Spiral micrometer

A more precise tool for measuring length than a vernier caliper. It can measure length accurately to 0.01mm, and the measurement range is several centimeters.