Mitutoyo AOS Absolute Scale Digital Caliper Review: The Best Digital Caliper for Supreme Precision

Mitutoyo AOS Absolute Scale Digital Caliper

Professionals and ordinary homeowners alike must have a device that can take precise measures because even one incorrect measurement can jeopardize the entire project’s progress.

As a result, an increasing number of pros are investing in digital calipers, a gadget that is incredibly useful for making small measurements exceptionally precisely for woodworkers and machinists.

Although this Mitutoyo digital caliper model has been on the market for some time, it remains one of the most technologically advanced digital calipers available on the market.

The Mitutoyo AOS Absolute Scale Digital Caliper is equipped with a variety of cutting-edge technologies, such as an integrated ‘On-Site Sensor.’ As a result of this tremendous advancement, the likelihood of measurements being erroneous due to dust, fluids, or debris from the surrounding environment is reduced.



The Mitutoyo Corporation, which began operations as a metrology company in 1934, has a long history of producing sensitive gauges and measuring equipment with a higher level of precision than its competitors. Upon the widespread adoption of electronic sensors, the company vaulted into a position of global leadership, with several of its products becoming industry standards in countries all over the world.

Its Advanced Onsite Sensor Caliper is an example of a high-grade digital caliper that is a step or two above the competition in terms of price and quality.

In terms of overall performance, we suggest the Mitutoyo AOS Absolute Scale Digital Caliper, which has a big, easy-to-read LCD screen and can measure in increments as small as 0.0005 inches (0.01mm).

Let’s dive into the amazing features of this fantastic digital caliper!



Digital calipers are relatively new on the market. They are more costly than a dial caliper, but they include several features that make them easier to use and read than the dial calipers. It is simple to switch between inches and metric units when using a digital caliper, such as the Mitutoyo AOS Absolute Scale Digital Caliper.

It is more robust than a dial caliper since it does not have any moving components in the readout, making it less likely to malfunction. This sort of caliper is ideal for use in extremely demanding work situations.



Digital calipers are available in three different materials: stainless steel, carbon fiber, and plastic. Each material has its own set of rewards and drawbacks. Stainless steel is the most common material utilized in the construction of high-end digital calipers.

On the other hand, carbon fiber is not as corrosion-resistant as stainless steel, and it can decay more quickly if exposed to water, dirt, or ultraviolet rays, among other things. Plastic calipers are frequently the least priced and lightest option available, but they are also the least long-lasting.

The Mitutoyo AOS Absolute Scale Digital Caliper is constructed of stainless steel of the highest quality. It is hefty and sturdy, and it is resistant to water, dirt, and oil. The Mitutoyo AOS Absolute Scale Digital Caliper is a tad more expensive than the other digital calipers on the market due to its thought-out engineering and construction.

Mitutoyo AOS Absolute Scale Digital Caliper Review


Measurement Range

The most important factor influencing a caliper’s measurement range is its size. The most common lengths are 6, 12, and 24 inches (meaning the distance the caliper can actually measure). For precision application, the Mitutoyo AOS Absolute Scale Digital Caliper measures 0 to 6″ (0 to 150mm) in 0.0005″ (0.01mm) increments.

Longer caliper lengths are ideal for larger automotive components. Still, the Mitutoyo AOS Absolute Scale Digital Caliper with a length of 6 inches is more than adequate for most repairs and upgrades.



The ability to take extremely accurate measurements with the Mitutoyo AOS Absolute Scale Digital Caliper is one of the key advantages of this tool. This digital caliper has the ability to measure in increments as small as 0.0005 inches (0.0125 mm) with precision.

In this caliper, the electrical components that translate the distance between the inside and outside jaws have the largest impact on the accuracy of the measurement it makes. Certain hardware components, on the other hand, can also play a role.

Stainless steel is used in the construction of the Mitutoyo AOS Absolute Scale Digital Caliper. As a result, the measuring jaws move more smoothly as a result of this. A big, textured driving wheel, in addition to providing greater traction for the fingers as they slide the jaws up and down, contributes to making more refined adjustments.

The AOS Absolute Scale Digital Caliper by Mitutoyo is extremely accurate in all aspects of its operation. However, a portion of the end result is also dependent on the user’s ability to operate it.


Depth Gauge

The depth gauge on a digital caliper is one of the most significant characteristics to look for.

An additional depth probe is included with the Mitutoyo AOS Absolute Scale Digital Caliper, which glides along the beam to collect depth measurements. It enables you to determine the exact depth of a whole piece of work. It is also required for determining the exact thickness of any type of material.


LCD Readout

The extra-large LCD screen of a digital caliper provides the added convenience of using it. The Mitutoyo AOS Absolute Scale Digital Caliper has a digital readout LCD that displays inch or metric units for convenience. It may be used to take absolute or incremental measurements.

Instead of attempting to measure using written markings, it is much more efficient and accurate to simply look at the digital display to discover the result of the measurement. As a result, having a wide display with a variety of display options such as metric units, imperial conversions, and overall accurate readings is advantageous.


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To confirm that your measurements are as precise and accurate as possible, it is critical to verify that your digital caliper is correctly calibrated.

You may find yourself in a difficult situation if you do not take exact measures, resulting in you ordering the incorrect size materials or making erroneous cuts, which could be disastrous to your delicate projects.

To do incremental comparison measurements, the Zero/ABS key on the Mitutoyo AOS Absolute Scale Digital Caliper allows the display to be zero-set at any slider point along the scale. The switch also allows you to revert to the absolute (ABS) coordinate and see your true position relative to the origin point (usually jaws-closed point).


What’s Included

The Mitutoyo AOS Absolute Scale Digital Caliper comes with a carrying case to keep it safe while on the go. We were, however, disappointed to see that it is not a shock-resistant case.

In addition, one SR44 silver oxide battery is included. The caliper has a low battery alert that indicates (via a ‘B’ symbol in the display) that the battery needs to be replaced. This allows for the battery to be replaced before the caliper becomes inoperable.

However, the Mitutoyo AOS Absolute Scale Digital Caliper does not have an automatic on/off option, which may result in some battery power being lost if you forget to turn off the device.


Price and Warranty

At $126, the Mitutoyo AOS Absolute Scale Digital Caliper is a bit costly for an entry-level caliper. However, the precision is excellent, and the AOS system is outstanding, offering the best value for its price.

Mitutoyo provides a one-year warranty period. The Mitutoyo brand’s assurance of quality ensures its recognition as a highly recommended product.



The Mitutoyo AOS Absolute Scale Digital Caliper is an excellent instrument for professionals who will value all of the modern features. We’re certain that this is one of the best digital calipers for huge construction jobs.

At the same time, it does not overcomplicate things, making it simple enough for beginners to utilize. We believe that the Mitutoyo AOS Absolute Scale Digital Caliper should be considered if you are searching for a very accurate, very reliable digital caliper that is competitively priced in contrast to similar models.

If you want to see more about other brilliant digital caliper options and how to choose the best one for your unique needs and tastes, you can read our extensive buying guide, which will make your buying process more comfortable and fun.


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