Etalon Dial Caliper
Brown & Sharpe dial caliper model 125



The connoisseur's calipers with the prancing pony on the dial.
Notice that small dots between the graduations subdivide readings to .0005"

These Etalon dial calipers are among the best available. They are identical to TESA and Brown & Sharpe dial calipers except that they have a thumb wheel which can give you more control. The housing is metal. The dial is white, black, or yellow. You can use the same depth base (optional) as B&S models. Hard plastic storage case is included. The storage case may have the TESA logo on it. They will use the same spare parts as the current model Brown & Sharpe dial calipers. Parts for older models will most likely no longer be available.

Once upon a time they were entirely made in Switzerland. The calipers may still have "made in Switzerland" or "Swiss made" printed on them, but they are currently made in China using Swiss parts, if you can believe that. The label's deception is disturbing.


Etalon calipers have an accuracy of ±.001" over the first 4 inches; ±.0015" for the next two inches.

*The metric version (not shown) has a yellow dial, but it does not have a thumb wheel. The metric model is not always in stock and may take 3-4 weeks for delivery. As an alternative, you may want to consider the Tesa metric dial caliper which is identical to this Etalon model.

Confusion! Customers can be confused when they receive the Etalon caliper in a box with the TESA insignia on it and when—on some web sites—the calipers are described as Brown & Sharpe. They are all one and the same. It would be nice if the manufacturer (TESA) would unify their brands. Just remember this:

Brown & Sharpe = TESA = Etalon = Hexagon Metrology

  • For more information on calipers, including calibration see page 11.
  • Optional depth base attachment designed for this Etalon dial caliper see page 173.

Brown & Sharpe 1" setting ring for calibrating the inside jaws

Manufacturer's product description

The Brown & Sharpe TESA Etalon dial caliper has an accuracy of 0.001", a 1.25" diameter rotating dial with a lock, is made of stainless steel, and measures in inches. The covered rack helps prevent measurement error by protecting the gear from foreign matter. Linear accuracy meets Deutsches Institut für Normung (DIN) 862 standards. These calipers are for use in measuring inside dimensions (ID), outside dimensions (OD), depth, and step.

The caliper measures 0.100" per revolution of the dial. The lock screw locks the dial and holds the sliding jaw in position. Adjustable zero set allows the user to set zero at a convenient distance. The depth rod is integrated into the rack of the caliper, unlike many calipers that offer a detachable depth rod, or none at all. The hardened stainless steel components, including the bar, measuring surfaces, rack, gears, and depth rod, offer corrosion resistance, increased accuracy, and long life. Spring anti-backlash control offers increased accuracy over standard gear configurations. Backlash is the amount of clearance between mated gear teeth in the caliper controls, which prevents the gear teeth from jamming. It is undesirable to have much backlash due to the lack of precision offered by the increased amount of play between gears. Certain gear designs can minimize or eliminate backlash; spring anti-backlash systems use a spring to add a compressive force, thereby minimizing backlash.

Calipers measure the distance between two opposing sides of an object. They make inside, outside, depth, or step measurements, according to their type. Calipers are commonly used in architecture, metalworking, mechanical engineering, and machining. The simplest calipers have two legs to mark the two points and require a ruler to take the measurement. More complex calipers use two sets of jaws instead of legs and have up to two graduated scales. Vernier, dial, and digital calipers give direct and accurate readings and are functionally identical, having a calibrated scale with a fixed jaw, and another jaw with a movable pointer that slides along the scale. The vernier caliper has a scale sliding parallel to the main scale for an additional, fractional reading to improve measurement precision. The dial caliper has a circular dial with a pointer on a toothed gear rack replacing the second vernier scale. As with the vernier, this second measurement is added to the reading from the main scale to obtain the result. The digital caliper takes a differential by zeroing the display at any point along the slide, with an LCD that displays a single value in English and/or metric units.

Brown & Sharpe manufactures precision measuring equipment and metrology hand tools. The company, founded in 1833, played a key role in setting industrial standards in the United States. Brown & Sharpe was acquired by Hexagon Metrology in 2001 and is headquartered in North Kingstown, RI.

This description is provided by the manufacturer



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This page's most recent revision: 19 October 2019
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