Show me a Digital Height Gauge

Posted on Oct 13, 2020

Digital Height Gauge

The digital height gauge does exactly what its name suggests - it measures the height of the workpiece. A digital altimeter is a gauge in which a stylus slide moves relative to a gauge scale on a rod and moves along a single vertical axis that is nominally perpendicular to the reference plane on the instrument base.

Digital height gauges are typically used on a granite slab to measure and / or describe the properties of a part from a reference plane. Generally, a stylus, test pointer, touch probe or CMM probe is used to locate the measured item. Digital altimeters are an essential quality control tool.


Types of Mechanical and Electronic Height Gauges

There are several types of mechanical and electronic height gauges to choose from, depending on your business needs and budget.


Mechanical digital altimeters

Mechanical digital altimeters have been used in flat panels for many years. There are three basic types of mechanical altimeters:

  • Vernier digital altimeters
    Available in heights ranging from 6 inches to 6 feet, which is a major advantage over other digital altimeters. It may have one or two (both inch and metric) scales on the bar.
  • Dial gauges
    generally only available in sizes less than 300mm. It is easier to read than the digital vernier height gauge, and its small size makes it ideal as a personal digital height gauge for storage in the driver's toolbox.
  • Digital Timers Digital
    It altimeters with two-digit counters reduce the time needed to disassemble parts. The dial is not only easier to read than the vernier scale, but thanks to the two-digit counters, one numerator can be set to the reference date and the other used as zero variables.

:: Read more : How to Manufacture Precision Mechanical Components


Electronic digital altimeters

Electronic digital altimeters can be divided into three different groups.

The first group has accuracies similar to mechanical digital altimeters. They usually have an inch / meter ratio, which is absolute zero and a floating zero, and a data output.

The second group contains all the features of the first group. However, the accuracy of the tool is an order of magnitude better and can have additional functions such as tolerance setting, ID / OD measurement, max / min, TIR and probe compensation.

In general, the last group has all the characteristics of the second group and a higher accuracy rating. Most digital height gauges in this class have air bearings, a motorized probe system, the ability to generate and save part programs, and a computer interface that enables SPC. You can also measure a part feature in two dimensions by rotating the part. Use these digital altimeters when higher levels of accuracy are required or to reduce CMM requirements.

Digital altimeters can be used to determine the height of an object or workpiece with extremely high accuracy and precision.

These precision gauges also provide marked positions on the object relative to the reference plane for later use.

Center to center distances, inside / outside diameters and step heights are some of the different measuring tasks that can be performed with highly specialized digital height gauges.

They claim consistency to be ± 0.0001 inch and can be extremely precise down to 0.001 inch. Of course, the consistency and precision of such instruments still depends on their overall quality. Therefore, it is important to only get one of the reputable manufacturer sites like


What's in a Digital Height Gauge?

High-quality, hardened stainless steel forms the body of the digital height gauge. To ensure the rigidity and stability of the instrument, the digital altimeter is made of solid cast iron. It also has a strap that extends from the base and includes a printed scale in both metric and imperial formats.

The metric scale usually ranges from zero to 300 millimeters, and the imperial scale from zero to 12 inches. With some digital height gauges, metric and digital scales can measure up to 2,000 mm or 80 inches.

The beam is also equipped with an electronic caliper equipped with Power ON / OFF, HOLD, TOL, SET, MM / CALE, ON / OFF / ZERO and ABS buttons.

The hard metal slider is on one of the jaws. The included ripper can slide up and down along the scale with the slide and be locked in place.

A fine knob is used for final adjustment to lock with the second adjusting screw. Send data to a printer or computer

The process of using the digital altimeter to take measurements is outlined below:

  • The first step is to make sure the surface you are on instrument will be placed is free of dirt and smooth.
  • Of course, cleaning the workplace is a must, just like any other equipment.
  • After cleaning, dry the surface of the altimeter.
  • Clean the measuring jaw before connecting it to the instrument.
  • Release the slider on the scale by loosening the locking screws. Then check if the height of the display registers changes by moving the slider up and down.
  • Finally, make sure that the surface of the measuring object is clean and dry.

How to take measurements?

The actual measuring process can be started as soon as the cleaning and preparation are completed. Here are the steps to get it right:

  • The measuring point is usually the working surface of the platform. Let the surface of the platform and the measuring jaw carefully contact the measuring force of about three to five Newtons. Also make sure that the LCD shows zero. Press the ON / OFF / ZERO key to set the value to zero.
  • Adjust the movable jaw to the nearest inch or centimeter by holding the bar against the surface plate.
  • Check the large LCD screen for reading.
  • Be careful when using the digital altimeter
  • Use the block to raise the base when measuring an object that is outside the range of the digital height gauge. In this way, the surface of the object or block becomes the starting point and the platform surface - the starting point.
  • Adjust the block height if this is the starting point (a more accurate measurement is needed to measure height).
  • Set the surface height when the starting point is the surface of the measured object.

Final Remarks

After the measurement, remove the jaws so that they can be cleaned with a cloth soaked in cleaning oil and dried. You can use a clean, dry cloth before storing the instrument in its case.

It is important to maintain a temperature of 5 to 40 degrees Celsius during storage or use. The protective sticker must not come into contact with any water liquid.

Finally, prevent damage to the electronics, such as circuit overload, for example by never applying voltage or engraving the depth gauge parts with an electric pen.


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