Depth gauges and vernier calipers are both commonly used measuring tools, but they have different functions and
application scenarios. This article will delve into the differences between depth gauges and vernier calipers, and conduct
a detailed comparison of their functions and applications, helping you make a better choice and use the appropriate
measuring tools.
I. The main differences between depth gauges and vernier calipers
1. Depth gauges are mainly used for measuring depth, such as the depth of holes, slots, etc. While vernier calipers
are a versatile measuring tool that can measure the outer diameter, inner diameter, depth, and step height of objects.
2. The differences in structure are also quite obvious. A depth gauge usually consists of a measuring rod with markings
and a vertical measuring bar attached to it. A vernier caliper, on the other hand, is composed of a fixed measuring body,
a movable scale, and measuring claws used for measuring different sizes.
3. In terms of accuracy, the accuracy of a vernier caliper is usually higher than that of a depth gauge. A common vernier
caliper can achieve an accuracy of 0.02 millimeters, while the accuracy of a depth gauge is typically around 0.1mm.
Of course, there are also some high-precision depth gauges that can achieve even higher accuracy.
II. Functions and Applications of the Depth Caliper Gauge
1. Measuring the depth of holes: This is the most common application of the depth gauge. Insert the measuring
rod into the hole and you can read the depth of the hole.
2. Measuring the depth of the groove: Similar to measuring the depth of the hole, insert the measuring rod
into the groove and you can read the depth of the groove.
3. Measuring the height of the steps: Place the measuring rod of the depth gauge tightly against the higher
surface of the step, and make sure the measuring rod is perpendicular to the lower surface.
hen, you can read the height of the step.
III. Functions and Applications of the Vernier Caliper
1. Measuring the outer diameter: Using the outer measuring jaws, measure the external dimensions of an object,
such as the diameter of a cylinder or the edge length of a cube.
2. Measuring inner diameter: Use the internal measuring jaws to measure the internal dimensions of an object,
such as the diameter of a hole or the inner diameter of a tube.
3. Measuring depth: Use a depth gauge to measure the depth of holes or grooves.
4. Measuring the height of the steps: Use the step measuring claw to measure the height of the steps.
IV. How to Choose the Appropriate Measuring Tools
1. If you only need to measure depth, then a depth gauge will suffice. If you need to measure multiple dimensions,
then a vernier caliper would be more suitable.
2. Consider the measurement accuracy. If a higher level of accuracy is required, then a more precise vernier
caliper should be chosen.
3. The measurement range needs to be considered. Different types of depth gauges and vernier calipers have
different measurement ranges, and the choice should be made based on actual requirements.
V. Maintenance Tips
1. After use, the measuring tools should be wiped clean and stored in a dry place to prevent moisture and corrosion.
2. Avoid collisions and falls to prevent damage to the measuring tools.
3. Regularly check the accuracy of measuring tools. If necessary, calibration or replacement should be carried out.
