VERNIER HEIGHT GAUGE

What is vernier height gauge?

Vernier height gauge is a special type of vernier instruments which is used to measure heights of different engineering objects up to high precision and accuracy during many of industrial jobs where measuring process is require.

Key Components:

Base

It’s a rectangular metallic part which is finely machined and horizontally jointed with other structure as shown in picture. As name shows its acts like base to hold all other parts because these all are mounted on it. It has lapped lower grounded surface for high accuracy.

Main Scale:

A long rectangular metallic bar mounted on base and its direction is perpendicular to base shown in figure. Main scale is engraved on it in millimeters in case of imperial depth gauge.

Vernier scale:

Its small scale on which Vernier scale is engraved and can read to accuracy of 0.01 mm and is moveable as it slides up or down on main scale.

Measuring Jaw:

Measuring jaw of Vernier height gauge is fabricated with Vernier scale and slides as scale moves up or down.

Fine adjustment screw:

As name indicates it is used for fine adjustment during measurement and allows Vernier scale to slide very little distances.

Fine adjustment clamp:

When adjustment is completed, tightening of this clamp provides provision to hold the Vernier height gauge measuring jaw at certain point in order to avoid errors of reading. Sizes available for Vernier height gauge in the range of 150mm to 500 mm.

Working Principle:

The Vernier height gauge operates based on the principle of a Vernier scale, which allows for fine measurements. The main scale provides the primary reading, while the Vernier scale gives additional precision by subdividing the smallest scale divisions.

Measurement Process:

Position the Gauge: Place the base on a flat, stable surface.

Adjust the Scriber: Slide the Vernier scale to position the scriber at the required height.

Read the Measurement:

Main Scale Reading: Read the value on the main scale just below the Vernier scale’s zero line.

Vernier Scale : Find the line on the Vernier scale that aligns perfectly with a line on the main scale.

Combine Readings: Add the Vernier reading to the main scale reading to get the total height.

Formula:

To calculate the total measurement: [ \text{Total Height} = \text{Main Scale Reading} + (\text{Vernier Scale Reading} \times \text{Least Count}) ] Where:

Main Scale Reading is the reading from the main scale.

Vernier Scale Reading is the aligned division on the Vernier scale.

Least Count is the smallest measurement the gauge can read, typically the difference between one main scale division and one Vernier scale division.