Linear Measurement

Browse our range of linear measurement equipment that includes calipers, distance meters, tape measures and lever dial indicators from manufacturers like Stanley and our own quality RS Pro brand.

What is meant by linear measurement?

Linear measurement refers to the measurement of a straight distance between two points, usually, this is a dimensional reference such as length, height or width of an object.

Units of linear measurement

Measurements are usually taken in a standard unit format that is either in metric or imperial units. The imperial system uses inches, feet, and yards. Whereas the metric system uses millimetres, centimetres and meters.

Measuring tools for linear measurement

There are a number of different instruments that are used for linear measuring. They can be classified into two methods of measuring, direct and indirect. Some instruments are can be further defined as graduated instruments as they have a linear scale on them used to take the measurement. Tools can be selected based on the application, the size of the distance or object being measured and the levels of precision required. Some popular types of products include :

  • Rules - for measuring lengths, available in a range of sizes and materials such as wood, plastic and steel.
  • Calipers - a handheld device for measuring distances between two points. The tips of the caliper are opened to the size of the distance, then removed and measured with a device such as a ruler. Common types include Vernier calipers, digital calipers and dial calipers.
  • Tape measures - for measuring lengths and distances, commonly used in DIY and carpentry. Available in different sizes, materials and with different measurement scales.
  • Micrometres - used for measuring small distances when high accuracy is required.
  • Dial indicators - round dial face present with visual scale and needle. Ideal use with machinery such as milling machines to check the accuracy of a work detecting small imperfections.
  • Distance meters - records measurements accurately using a laser, without any contact.
  • Feeler gauges - for measuring the width of gaps, commonly used in engineering. Usually, have a collection of small lengths of steel that are different thicknesses.
Calibrate new and existing equipment
Get a quote online, quick and easy
Return online within 30 days

Guides & Articles


Everything you need to know about Tape Measures


In our comprehensive guide, we look at the different types of calipers, what they are used for and how they work with some handy tips on how to use them.

Related Products
The IP67 digital caliper complies with DIN EN ...
The IP67 digital caliper complies with DIN EN 60 529 is dust proof and withstands temporary complete immersion in water without suffering any damage. Sliding calliper with 0 - 150 mm measurement range.Equipped with a flat depth gauge.Precision: 0.02 mm.Resolution: 0.01 mm.Resistance to dust, coolant fluids and splashes of oil ...
RS PRO fine adjustment Vernier Calipers feature dual ...
RS PRO fine adjustment Vernier Calipers feature dual scales with both metric and imperial readings of internal and external precision measurements. The adjustable mechanism has two lockscrews so you can accurately measure objects with ease. The calipers sliding surfaces are raised to prevent wear to the scale. Internal jaws, external ...
Shockproof mechanism disengages the gear assembly from the ...
Shockproof mechanism disengages the gear assembly from the rack, when the gauge is exposed to sudden impacts. Adjustable dialHardened & ground racksBezel lockLug back fittedTolerance pointersAnvil thread 2.5mmMeasuring Range: 10mmBezel Diameter: 60mmDial Graduation: 0.01mmScale Reading: 0-100Stem Diameter: 8mm.
Professional caliper that allows measurement of interior, exterior, ...
Professional caliper that allows measurement of interior, exterior, throat, step and depths. This caliper benefits from chemically formed markings for perfect resistance to wear and chemicals. Ground stainless steel with anti reflective matt finishEquipped with a lock screw40 HRc hardnessClass 0 option has 1/50th 0.02 mm accuracyStandard has 1/20th 0.05 ...