DIACHECK-CT series digital arch gauges

Arch gauges measure the radius of curvature or the inside or outside diameter of a given part using the three-point circumference measuring method.

The DIACHECK-CT series high-precision digital radius and diameter gauge is designed to measure the radius of cylindrical objects such as tubes, profiles and rolled parts quickly and accurately.

The instrument gives a direct, instant reading of the inside or outside radius for a wide range of curves, profiles, diameters and cylindrical objects.

Easy to use

The large LCD display shows the measured value immediately in digital form and, where required, allows the value to be transferred via Bluetooth.

DIACHECK-CT series arch gauges are very convenient to use. There is no need to cut out templates to find the radius of a curve, nor to remove the part from the machine to measure it, nor to take the part out of its installed position (buried pipes, installed tanks, rolling machines already positioned and fixed, for example).

DIACHECK-CT series arch gauges have many fields of application and are supplied with different measuring arches and different contact angles. Using the various arches gives a measuring range between 100 and 10000 mm.

Documentation

Why choose a DIACHECK-CT arch gauge ?

1. Large LCD display
   DIACHECK-CT series arch gauges use an LCD display with highly legible 8 mm characters
2. Long-life battery power
   The use of an extremely low-consumption electronic controller means the instrument runs on non-rechargeable batteries that last up to a year with daily use.
3. Protective case
   The protective case shields the measuring instrument against knocks and accidental drops
4. Display rotatable through 180°
   The DIACHECK-CT arch gauge can also be used upside down, because the display rotates through 180° and the reading stays easy to see with the instrument inverted (non-Bluetooth versions only).
5. Wireless data transmission button
   The wireless transmission button is placed in a convenient, accessible position and allows the measurement to be sent remotely even when the operator is wearing protective gloves.
6. Hardened support rollers
   The support rollers are made of hardened steel to reduce wear over time.
7. Easily removable measuring instrument
   The measuring instrument is mounted on a removable holder and can be fitted to more than one arch, so that a single instrument makes up several arch gauges with different characteristics and measuring ranges
8. Interchangeable contact point
   The measuring point has an interchangeable tip. The tip can be replaced to create custom contact points.
9. Replaceable support rollers
   Where the arch gauge is used on very abrasive surfaces, or with the “continuous scanning” measuring technique, the contact rollers may need replacing. For this reason the support rollers are interchangeable.

Technical characteristics

This radius gauge gives a direct, instant reading of the inside or outside radius for a wide range of curves, profiles, diameters and cylindrical objects.

• Convenience: there is no need to cut out templates to find the radius of a curve, nor to remove the part from the machine to measure it, nor to take the part out of its installed position (buried pipes, installed tanks, rolling machines already positioned and fixed, for example)
  
• Ease of use: it is easy to use and the measuring process is extremely quick. Simply place the gauge inside or outside the curve to obtain the radius of curvature, or the diameter of the object, automatically.
  
• Any material: the gauge is suitable for any type of solid material such as steel, wood or plastics.
  
• High accuracy: the margin of error on the radius is only 0.1 mm (measuring accuracy depends on the surface quality of the solid being measured; to obtain maximum accuracy the surface must be free of dips and of high surface roughness).
  
• Field of application: this radius gauge is supplied with different measuring arches and different contact angles. Using the various arches gives a measuring range between 100 and 10000 mm.

Innovative and versatile

• Battery-powered digital LCD display: convenient reading of the measured value, with the option of transferring it to a Bluetooth-based acquisition system.
  
• Practical: it is small and light and can easily be used for different measurements simply by changing the measuring arch.
  
• Transport: an aluminum case with internal foam padding is available to store and protect the gauge when not in use. Easy to carry and shock-resistant.
  
• Two units of measurement: you can choose to measure in millimeters or inches simply by pressing the unit conversion button.
  
• Ideal for large radii: the instrument can measure radii up to 10 meters with maximum accuracy.
  

Typical applications

• Measuring the radius of curvature of bent tubes.
  
• Measuring the outside diameter of tubes and pipes (even when already installed or buried).
  
• Measuring the inside diameter of ribs and large tubes.
  
• Measuring the radius of curvature of curved sheet metal.
  
• Measuring the diameter of large tanks or silos, both while the individual parts are being built and during assembly and positioning.

• Measuring the radius of curvature of molded or thermoformed plastic parts.
  
• Measuring the radius of curvature of rolled and bent beams.
  
• Measuring the shape of molded parts or curved sheet metal for the furniture industry.
  
• Measuring the curvature of glass or of items with complex geometric shapes.
  
• Checking and comparing the mathematical model of geometric shapes produced by CNC.
  
• Checking the curvature of tubes and fittings.

• Measuring the curvature of glazing and of mating profiles.
  
• Measuring the radius of curvature of body panels and sheet metal parts for the automotive industry.
  
• Measuring the diameter of ribs for tunnels or for construction.
  
• Measuring the radius of curvature of cement and concrete products.
  
• Measuring the radius of curvature or the diameter of parts for the marine industry or for building large structures.

• Measuring the radius of curvature of profiles during processing on profile bending machines, press brakes and forming systems.
  
• Measuring the diameter of tubes and the mating taper for the hydrocarbon, water and liquid transport industry.
  
• Measuring the degree of taper of mating flanges for tubes or tanks.
  
• Measuring the diameter or the radius of curvature of rolled or welded products.
  
• Checking correct assembly of parts during mating and sealing.
  

In depth

Arch gauges are an indispensable instrument for measuring objects with curved geometry such as tubes, sheet metal, glass and profiles. Their technology makes it possible to calculate the curvature of such materials with extreme precision.

Using these instruments, professionals and enthusiasts in fields such as mechanical engineering, steelwork, joinery, glass production and furnishing elements can create objects and parts with perfectly calibrated, uniform curves, guaranteeing a high-quality end result.

Arch gauges make it possible to determine the precise curvature of every single tube or profile, avoiding problems during positioning and installation.

Sheet metal and glass also require particular curvature, especially in architecture and in the furniture industry.

Arch gauges allow curvature to be measured precisely and uniformly, avoiding the risk of chipping or breaking the material during processing and positioning.

These instruments also make it possible to calibrate the curvature of sheet metal and glass perfectly, guaranteeing an end result that is both attractive and functional.

Lastly, arch gauges are widely used in the metalworking industry for bending metal profiles. They allow the most accurate possible measurement, avoiding errors that could compromise the stability and functionality of the products made.

What is more, the measurements taken with arch gauges make it possible to guarantee uniform curvature throughout production, assuring customers of an excellent end result.

SMALL RANGE SERIES

MEDIUM RANGE SERIES

EXTENDED RANGE SERIES

CONTROLLERS AND CALIBRATORS

All DIACHECK-CT series arch gauges are fitted with an interchangeable, removable electronic controller with dial indicator, which can be mounted on different arches to make up several configurations with a single measuring instrument. Two controllers are available:

• DIACHECK-CT-25S — electronic controller with 25 mm range dial indicator (versions with and without Bluetooth). On the medium range series, switching from outside to inside radius requires an extension tip to be fitted or removed.
• DIACHECK-CT-50S — electronic controller with 50 mm range dial indicator (versions with and without Bluetooth). Measures outside and inside radii with no additional accessories.

Dedicated calibration arches are available for calibration and periodic verification of correct measurement (convex surface for inside radii/diameters, concave for outside ones), complete with serial number and, on request, a measurement certificate with Accredia traceability.

➜ Calibrators for arch gauges: models, radii and part numbers »

Frequently asked questions