A height gauge is a measuring device used either for determining the height of something, or for repetitious marking of items to be worked on. The former type of height gauge is often used in doctor's surgeries to find the height of people.

The vernier height gauge may be used in metal working to mark items for machining at a specific height.

The digital height gauge is made from high quality, hardened stainless steel. It comprises a solid cast iron base which is robust to ensure rigidity and stability of the instrument; and extending from the base up is the beam which includes a printed scale in both imperial and metric format. Usually, imperial digital scales range from 0 to 12 inches while the metric scale ranges from 0 mm to 300 mm. They can even measure up to 80 inches or 2000mm. An electronic measuring slider is mounted on the beam and it comes with the ABS, ON/OFF/ZERO, MM/INCH, SET,TOL, HOLD, Power ON/OFF buttons. The slider comes with a carbide scriber tip on one of the jaws. The slider together with the attached scriber can slide up and down along the scale and be locked in place. A fine-tune thumb-wheel is then used to make the final adjustment and locked in place by a second locking screw. There is also a data output port where by the data can be sent to a computer or a printer via a special cable.

To use and read the digital height gauge correctly, follow these general steps below:

2. Preparation

Step1:  Clean the working platform and put the digital height gauge on it

Step 2:  Dry the surface of the protective sticker of the digital height gauge.

Step3:  Fix the measuring jaw of the digital height gauge

Step 4:  Clean the measuring jaw of the height gauge

Step 5:  Loosen the locking screw of the height gauge

Step 6: Move the slider to check if the LCD displays and all the buttons work properly

Step 7:  Clean the measuring surface of the item being measured with clean cloth (or soaked with cleaning oil.

3. Taking the Measurements

Step1: Usually the point of measurement is the surface of working the platform. Make the measuring jaw and platform surface gently touch (measuring force is about 3-5N), the value on the LCD should be 0, or press ON/OFF/ZERO button to make it 0.

Step2:   Hold the rod against the surface plate and adjust the movable jaw to the nearest centimeter or inch

Step3:  Get the reading from the large LCD screen directly

4. Caution

When measuring an object beyond the range of the height gage, lift  the base with a block. Then the zero point is the platform surface and the starting point is the surface of the block or object. If the starting point is the block, preset the height of the block (the height should be measured by a more accurate instrument). If the starting point is the surface of the measured object, preset the height of the surface (the height is designed value or actual value, according to actual needs).

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5. Note

1). Take off the jaws after the measurement, dry and clean them with a clean cloth (or soaked with cleaning oil) and then store in the fit case.
2).  Maintain temperature between 5-40′C both during storage or in use. The relative humidity is ≤80%, and prevent any hydrous liquid from contacting the protective sticker.
3).  Never apply voltage to any part of the depth gauge or engrave with an electric pen as it might cause damage to the electronics.
4).  Preset a starting point of measurement correctly. Do not press the “ON/OFF/ZERO” button purposelessly because it may cause measurement error.

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