Measuring Equipment

Whether you are in the market for calipers, micrometers, indicators or gauges at Brisbane Industrial Agencies we either have it in stock or we can source it for you.


Which tool you select to take a measurement depends on the type of measurement you are taking and the accuracy you need. When taking inside and outside measurements, you can use either a vernier caliper or a micrometer (inside or outside). For depth measurements, you will be able to select from several depth instruments. There are advantages and disadvantages to each type of tool.

Digital VernierDigital Calipers

You may be using electronic calipers. These have an electronic readout rather than a vernier scale. Typically an electronic caliper will have three buttons, an on/off button, an English/Metric button, and a Zero button. The procedure of using an electronic caliper is:

  1. Turn the caliper on.
  2. Select English (inches) or Metric (millimeters) reading–
  3. Close the caliper jaws and press the Zero button.
  4. Measure the desired object and read the digital readout.

Vernier Digital  Vernier Calipers

You may decide a vernier caliper is best for the measurement you are making. If this is so, you must choose a vernier caliper in a size that is larger than the measurement you want to make.

You can use the vernier caliper for many different kinds of measurements. You can use this one tool for both inside and outside measurements. Because of the shape of the jaws and their position with respect to the scale, the vernier caliper is more adaptable than a micrometer.

Dial CaliperDial Calipers

Clean the measuring faces before and after measurement. Close the jaws and check that the indicator points to “0” on the dial face.If caliper doesn’t zero, loosen the bezel clamp screw and rotate the bezel to the “0” position. Tighten the bezel clamp screw to fix the “0” position.

Dial graduation of .001″ and .100″ in one revolution for dial caliper of inch system.

Dial graduation of 0.02mm or 0.01mm and 2mm or 1mm in one revolution for dial caliper of metric system.

Digital IndicatorsDigital Indicators

Thickness gaugeThickness Gauges

Micrometer Micrometers

Inside Micrometers  You may choose to use an inside micrometer to make an inside measurement.  You must choose an inside micrometer with a range that includes the approximate size you want to measure. This means you must consider the size of the micrometer unit, the range of its screw, and the length of the extension rods available. The smallest size you can check is equal to the size of the micrometer unit with its screw set to zero and its shortest anvil in place.

The average inside micrometer set has a range from 2 to 10 inches. You use extension rods to cover the steps (by 1 inch increments) of this range. The micrometer set may also have a collar. This collar is 0.5 inch long. It is used for splitting the inch step between two rods. The collar extends a rod another 0.5 inch. This allows the range of each step to overlap the next.

There are several things to consider if you want to properly choose an inside micrometer to make a measurement. First you must estimate the inside measurement you want to make. This estimate should be within the range of the micrometer screw. The size of the extension rod you need depends on the size and range of the inside micrometer. With the inside micrometer screw set to zero, you will fit an extension rod to the micrometer. If you choose the right extension rod, the total length of the micrometer and rod will be less than (but within the micrometer screw range of) the estimated distance to be measured.

Dial Caliper gaugeDial Caliper Gauges

Dial Indicator Dial Indicators


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