High-quality metrology for quality control in the measuring room, production, incoming goods and development.
Gear Metering Pumps & Meter Mix Dispense Machines with highest accuracy for processing liquids and pastes.
High-precision rotary stroke bearings for backlash-free linear and rotational movements for use in machine and device construction.
Innovative handheld measuring equipment from Mahr: Calipers, micrometers and dial indicators from analog to digital models with integrated wireless transmission. Mahr's comparative measuring instruments and reference standards are indispensable for your precise production metrology.
From analog to digital, the entire spectrum of calipers. Easy handling, wireless, and highly accurate. Perfect for efficient use in manufacturing.
A safe, easy to read digital display, the modern design and the usual Mahr accuracy characterize our digital calipers. The range includes measuring instruments for all applications. Various interfaces for data transmission and protection rating up to IP 67 leave no demands unfulfilled.
Glare-free reading, hardened steel, raised guideways to protect the scale and provide the highest accuracy. Features of a quality caliper from Mahr with the classic vernier caliper.
Large, high-contrast dial and shock-protected measuring tool for lasting precision. A tried and tested mechanical design for fast and safe reading.
Maximum precision in a variety of designs. Micrometers from Mahr are available in conventional mechanical and digital and wireless versions.
A clear digital display, modern design and the usual Mahr accuracy characterize our digital outside micrometers. The range includes measuring instruments for all applications. Various interfaces for data transmission and a high protection rating up to IP 65 leave no demands unfulfilled.
Anti-glare reading, thermal insulation plates and a precision-ground spindle for maximum accuracy. Features of a quality micrometer from Mahr.
Particularly suitable for reliable and fast testing of series parts (shafts, bolts, shanks). The dimensional accuracy is recognized and read at a glance on the dial comparator.
Suitable for measuring large diameters and testing distances up to 2,500 mm
Available with scale or digital display or as a quick-measuring instrument with pistol-type grip. The Mahr 3-point inner measuring devices always provide reliable measuring results due to automatic self-centering.
Anti-glare reading and a precision-ground spindle for maximum accuracy. Features of a quality micrometer from Mahr.
From analog to digital, the entire spectrum of dial gages, dial comparators and dial test indicators. Easy handling, wireless (optionally), and highly accurate. Perfect for efficient use in manufacturing.
A clear digital display, robust construction and high Mahr accuracy characterize our digital dial gages. The range includes measuring instruments for all applications. Various interfaces for data transfer and a high protection rating up to IP 54 leave no demands unfulfilled.
High sensitivity and accuracy due to: Solid mounting of the measuring tool axes, precision-geared wheels and pinions, high-precision mounted measuring pin.
High sensitivity and accuracy due to: Solid mounting of the measuring tool axes, precision-geared wheels and pinions, high-precision mounted measuring pin
Compared to analog dial indicators, Millimess dial comparators have even more precise components, providing better measuring accuracy and a much improved hysteresis error. These advantages are particularly evident in runout tests, straightness and flatness measurements and comparative measurements.
The high-precision inductive Millimess dial comparators are capable of digital increments of up to 0.2 μm. User-friendly operating functions such as tolerance monitoring, minimum or maximum recording for dynamic measurements, a combined numerical and scale display and simple data transfer make it an indispensable precision measuring instrument.
The sensitive computer-optimised measuring tool ensures maximum reliability and precision. For rough workshop use, the display is superbly protected against scratching or breakage by a hardened mineral glass pane, and a seal also provides reliable protection against penetrating liquids.
An easy-to-read digital display, the robust design and high Mahr accuracy characterize our digital dial test indicators.
Mahr 3D measuring probes for NC machines, machining centers and eroding machines shorten setup and downtimes. Perfect for accurately contacting reference edges on workpieces and fixtures.
Whether Integrated Wireless, external wireless modules, USB, Opto RS232, or Digimatic: Regardless of which interface standard you use, MarConnect will always provide the best connection.
Many Mahr precision gages have a data output with MarConnect interface. Regardless of which interface standard you use, (USB, Opto RS232 or Digimatic), MarConnect will always provide the best connection.
Mahr’s Wireless range guarantees you precise measuring results with full mobility. The modern and easy way to measure – without the restrictions of wired technology.
MarStand measuring tripods, measuring tables and radial run-out gages offer high stability, the basis for precise measuring results. They offer the necessary support for your dial indicators, dial comparators, dial test indicator measuring devices and measuring probes.
Measuring tripods provide the basis for precise measuring results due to their stable design. They offer the necessary support for your dial indicators, dial comparators, dial test indicator measuring devices and measuring probes.
MarStand post and support assemblies are used for individual solutions and offer high stability, the basis for precise measuring results. They offer the necessary support for dial indicators, dial comparators, dial test indicator measuring devices and measuring probes.
Measuring tables combine a precise and level measuring table, a stable measuring column and strong arm parts. MarStand measuring tables provide the basis for precise measuring results due to their extra stable design.
Radial run-out gages are the simplest method of detecting positional and form errors on shafts in a close-to-production environment. Due to the variety of models, the robust MarStand radial run-out gages form the basis for a wide range of workpiece requirements and precise measuring results.
Test plates made of hard granite are the perfect surface for your height measurement instruments due to the plates’ high strength and dimensional stability.
Using indicating gages as comparative gages make the perfect tool for precision measurements in manufacturing. Setting the gage to a reference standard reduces the deviation margin and minimizes the influence of temperature fluctuations on the measurement result.
Indicating snap gages are the perfect measuring tools for precision measurements of cylindrical parts such as shafts, bolts and shanks, especially for safe and fast tests on series parts. The dimensional accuracy is identified and read at a glance on the dial comparator.
Inner measuring devices are the perfect tools for precisely measuring the diameter, roundness and conicity of holes.
Our thickness gages offer a robust and simple range for particularly fast measurement of a variety of films, sheets, and plates.
If common measuring instruments such as calipers or inner micrometer screws cannot be used due to the workpiece geometry, caliper gages are the perfect solution!
Our depth gages offer a robust and simple range for particularly fast depth measurements. The 8mm mounting shaft allows the use of dial indicators, dial comparators and probes according to the measuring task.
Universal measuring instruments are the perfect partners for precision measurements in production, because the comparison measurement to a reference standard minimizes the influence of temperature fluctuations on the measurement result.
No matter whether gear, thread, taper or recess: Multimar universal measuring instruments are an ideal solution for almost all internal and external measurements for which standard measuring instruments are not suitable. A choice of basic units and an extensive range of accessories are available.
Accurately adjust your inside and outside measuring instruments. When using the 844 S setting instruments, you are perfectly equipped for every measuring task - even for larger dimensions.
No matter whether centering shoulders, narrow collars or recesses: The Multimar 36B universal measuring instruments are an ideal solution for almost all inner and outer measurements. A choice of basic units and an extensive range of accessories are available.
Trust in Mahr setting standards and gages - because they are the basis for precise measuring results.
Trust in Mahr’s setting standards - because they are the basis for precise measuring results.
Mahr gage blocks ensure that you have high-quality reference and working standards at your disposal. Choose from four tolerance classes and two materials to suit the requirements of your workshop, production or quality assurance.
Mahr pin gages are available in three tolerance classes and various designs. Choose the device to suit the requirements of your workshop, production or quality assurance.
The requirements for electrical length measuring instruments are just as varied as their applications. Excellent reliability, precision and simple operation are called for.
The requirements for electrical length measuring instruments are just as varied as their applications. Excellent reliability, precision and simple operation are called for. Millimar compact and column measuring instruments meet these requirements.
Millimar length measuring instruments are compact, robust, and easy to use. They are versatile evaluation and indicating instruments for measuring tasks of manageable complexity in the production area and in the measuring room.
The diverse combination options of modules and software provide the opportunity to design a working environment and tools more individually than ever before.
Smart and universally applicable software for complex measurement tasks in the manufacturing sector
Millimar transducers are the most important components of a measuring chain. Their characteristics determine the quality of the entire measurement. Depending on the application, various technologies are available for this purpose. For example, Millimar inductive measuring probes: These products are rugged, versatile and attractively priced.
No matter whether thickness measurement, radial runout or concentricity: With the inductive probes you can record measured values and deviations independent of shape, support or radial runout deviations. Their great advantage is the large linearity range and the relative insensitivity to interference. The probes are mainly used for comparative measurements in production, but the specific tasks of the sensor can vary.
Pneumatic length measuring instruments are characterized by their high accuracy and long-term stability. Non-contact measurement with measuring nozzles does not damage the workpieces. Even workpieces that are uncleaned, oiled, lubricated or coated in lapp
Millimar length measuring instruments are compact, robust, and easy to use. They are versatile display and evaluation devices for measuring tasks of manageable complexity in the production area.
Measurement results are displayed on 101 three-color LEDs and can easily be read from a distance. If the programmable warning and tolerance limits are exceeded, the segments change colors from green to yellow or red.
The Millimar pneumatic measuring devices quickly and accurately record dimensional deviations. It has proven itself for many years in the industrial production and measuring room.
For measurement and evaluation on the go.
Non-contact measuring, using pneumatic measuring rings, no damage to the workpieces.
Adapt the measuring station to your measuring task with the accessories for air measuring technology.
Trust in Mahr’s setting standards - because they are the basis for precise measuring results
Setting of pneumatic measuring instruments (nozzle ring gages) Meticulously hardened, aged, ground and lapped.
Setting of pneumatic measuring instruments (nozzle plug gages) Meticulously hardened, aged, ground and lapped.
Want to aim high with your measurements? Digimar is the one for you!
For scribing and marking workpieces in the workshop. Easy measurement of heights and distances.
Touch operation, ergonomic handling and a wide range of evaluation options: This is what the Digimar 816 CLT height measuring device stands for.
Touch operation, ergonomic handling and a wide range of evaluation options: This is what the Digimar 817 CLT height measuring device stands for.
Precision length metrology stands for high-precision dimensional metrology – for both absolute and relative measurements.
Universal, easy-to-use length measuring and setting devices for the shop floor
Universal, easy-to-use length measuring and setting devices for the shop floor
Due to the wide product range from the simple gage block test stand, fully automatic dial gauge test stand, and the ULM devices to the ultra-precise and partially automated CiM universal measuring machine, Mahr always offers a practical solution for production, measuring rooms and calibration laboratories. In other words: Maximum precision combined with extremely efficient measuring processes.
Whether classic ULM or motorized PLM and CiM instruments. Mahr universal length measuring machines enable user-friendly, fast and reliable measurement with minimal uncertainty.
Semi-automatic and fully automatic testing of dial indicators, dial test indicator measuring devices, dial comparators and probes - efficient and precise.
Semi-automatic and fully automatic testing of dial indicators, dial test indicator measuring devices, dial comparators and probes - efficient and precise.
Manual testing of dial gages, dial test indicators and comparators - easy and precise
Trust in Mahr gage block comparators - because they are the basis for the precise testing of your standards
Microscopes are used in almost all industries for the quick inspection of distances, radii, and angles. In the laboratory or close to production.
For the quick evaluation of geometric elements
Surface metrology for industry and research
Structured functional surfaces with strict tolerances require high-precision measuring systems that record the topography of a workpiece or object over a short area in a minimum of time.
Contour measurement technology is used to determine rough shape deviations.
Precisely measure contours with optical measuring instruments
Contour and roughness measurement combined: The professional allrounder
Contour and roughness measurement combined: The professional allrounder
2D/3D Contour measurement as well as roughness measurement acc. to ISO 25178 / ISO 4287
3D surface metrology for industry and research
Measure everywhere with mobile measuring devices!
Measuring stations for the measurement of high-precision lenses
When standard solutions are no longer enough: Individual customized solutions
Structured functional surfaces with strict tolerances require high-precision measuring systems that record the topography of a workpiece or object over a short area in a minimum of time.
Versatile and powerful in measuring rooms and laboratories
Contour and roughness measurement combined: The professional allrounder
Tactile measuring stations for contour & roughness measurements
2D/3D contour and roughness measurement acc. to ISO 25178 / ISO 4287
3D surface metrology for industry and research
Measure everywhere with mobile measuring devices!
Mobile 3D surface metrology for
use on-site
Mobile measuring instruments let you measure exactly where you need the results.
Measuring stations for the measurement of ultra-high sensitivity lenses
When standard solutions are no longer enough: Individual customized solutions
Metrology
Experience outstanding features combined with extreme flexibility in workpiece size and increase your productivity in the production environment.
Flexible measurement of workpieces that can be clamped between centers
High resolution and very fast matrix camera for measuring a large number of features on rotationally symmetrical workpieces.
Fast optical matrix camera in combination with high-precision touch probes for measuring a large number of features on rotationally symmetrical workpieces.
Flexible clamping options and high-precision alignment using a fully automatic centering and tilting table
High resolution and very fast optical matrix camera for measuring a wide range of rotationally symmetrical workpieces. Addition of a fully automatic centering and tilting table for extremely fast, mechanical alignment and flexible clamping options.
Fast optical matrix camera in combination with high-precision touch probes for measuring a large number of features on rotationally symmetrical workpieces. Addition of a fully automatic centering and tilting table for extremely fast, mechanical alignment, flexible clamping options and, for example, internal measurements.
Systems for measuring form and position tolerances, such as roundness, flatness, straightness and coaxiality. From manual to fully automated.
The device measure features such as roundness, straightness and concentricity simply, cost-effectively, and yet with high precision. Our manual form measuring instruments are suitable for both the measuring room and for measurements close to production.
With our automatic form measuring systems, you reduce your process costs, but without driving up inspection costs - through stable, innovative devices with the highest level of automation, flexibility and accuracy.
Metrology
Experience outstanding features combined with extreme flexibility in workpiece size and increase your productivity in the production environment.
Flexible measurement of workpieces that can be clamped between centers
Flexible clamping options and high-precision alignment using a fully automatic centering and tilting table
Optical and tactile shaft measurement systems for use in harsh manufacturing environments. Complete measurement of all common rotationally symmetrical workpieces.
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Universal, fully automatic and robust optical shaft measuring devices for use in harsh production environments.
Optical-tactile shaft measurement devices for use in harsh manufacturing environments. Complete measurements of all common rotationally symmetrical workpieces.
Metrology
Experience outstanding features combined with extreme flexibility in workpiece size and increase your productivity in the production environment.
Flexible measurement of workpieces that can be clamped between centers
Flexible clamping options and high-precision alignment using a fully automatic centering and tilting table
From highly specialized gear analyses to fully integrated series measurement - Mahr is your reliable partner at every level of modern gear and gearbox manufacturing.
Measure your product at the point of origin - including rapid feedback to the manufacturing process in order to avoid waste.
Wide range of technologies and products for fast and contactless recording of surfaces and geometries.
For the quick evaluation of geometric elements
Determination of roughness, contour and many other surface parameters.
Surface metrology for industry and research
Minimal roughness accurate to the nanometer
Optical analysis of surface topographies and geometries
Refurbished systems in proven Mahr quality
Touch operation, ergonomic handling and a wide range of evaluation options: This is what the Digimar 816 CLT height measuring device stands for.
Calibrating for consistent quality
Mr. Müller, what exactly does calibration mean?
alibration means comparing two concrete things with each other: the measured values of a standard and those of an object to be measured. The standard must be traceable to national and international standards, because this is the only way to ensure that the values are connected to the International System of Units (SI). The measured quality is finally documented, usually in the form of a calibration certificate.
What does a calibration certificate contain?
calibration certificate documents the metrological traceability to national standards. In other words, the measurement result can be referenced to an international standard, such as the Urmeter in Paris. However, there are different calibration certificates – for example according to DAkkS, the German Accreditation Body – or so-called factory calibration certificates. These DAkkS/DKD calibration certificates are, in addition to the calibration certificates of the German national metrological institute of the Physikalisch Technische Bundesanstalt (PTB), the traceability. Their issuance is only possible by accredited laboratories. DAkkS calibration certificates show the measured values plus measurement uncertainties together with calibration procedures and environmental conditions. The Deutsche Akkreditierungsstelle GmbH (DAkkS) is a signatory to the multilateral agreements of the European Cooperation for Accreditation (EA) and the International Laboratory Accreditation Cooperation (ILAC) for the mutual recognition of calibration certificates. These are recognized accordingly worldwide.
What, on the other hand, does a factory calibration certificate indicate? And how binding is it?
Factory calibration certificates are more cost-effective. Like the DAKKS/DKD certificates, they are entered into the customer's own test equipment monitoring system and are also subject to regular monitoring. The traceability of the reference standards named and used in the factory calibration certificate should be ensured via the regular test equipment monitoring of the calibration service provider. In the case of DAkkS/DKD laboratories, this is monitored by assessments of the accreditation body. Factory calibration certificates can take the place of DAkkS/DKD calibration certificates if there is no accredited calibration laboratory on the market for this measurand or measuring instrument. However, there is no obligation to recognize factory calibration certificates!
Which parameters must a calibration certificate contain?
In terms of content, it consists of a general and a metrological part. The former includes a reference to the legal security of the procedure and international recognition. The metrological content is divided into individual chapters – measurement task, measurement method, measurement conditions and measuring point plan, reference standard, environmental conditions, measurement results, measurement uncertainties and remarks. This structure can be extended if required. Accreditation by the national accreditation body (in Germany, DAkkS GmbH) is generally limited to individual instruments, parameters and standards. An example: At Mahr in Göttingen, there are about 3000 different instruments, of which about 30 are included in the accreditation scope. At the Mahr laboratory in Esslingen, which mainly deals with the calibration of hand-held measuring equipment, the number is around 150 accreditations.
How is calibration to be performed?
The basic requirement is that measuring equipment and standards must be traceable to national standards. In addition, the measuring and test equipment must be monitored regularly, i.e. there must be measuring equipment management and condition monitoring. Furthermore, the entire measurement chain must be switched on for a certain period of time before calibration begins in order to avoid thermal effects such as drifting. Ambient conditions must be taken into account depending on the purpose of the calibration. Only the user can be responsible for observing a reasonable period of time for repeating the calibration. The calibration service provider and instrument manufacturer cannot judge the conditions on site such as frequency of use, qualification of personnel and environmental conditions. Usually, the recalibration interval is determined by the customer's own test equipment monitoring department when the device or standard is first delivered. For instruments and standards of the length measuring technique, five years should not be exceeded until the next calibration.
What are the mandatory requirements that calibration laboratories must meet?
They must be accredited according to the internationally accepted standard DIN EN ISO/IEC 17025 (2018) – this is proof of competence. Accreditation is important for all companies that are certified according to VDA 6.1, QS 9000 and TS 16949 or are subject to the special guidelines of certain automotive companies. And accreditation according to DIN EN ISO/IEC 17025 also provides proof that the laboratory meets requirements of the DIN EN IS0 9000 ff. (2015) standards.
How many calibration laboratories does Mahr maintain?
Mahr has five calibration laboratories for length metrology worldwide, all of which are accredited according to ISO/IEC 17025 (2018). They are located in Göttingen (DE), Esslingen (DE), Probostov (CZ), Providence (USA) and Chennai (CN). Calibration laboratories always have a quality management system with, among other things, quality objectives and processes. These objectives include, for example, striving for continuous improvement of processes and own services. It documents responsibilities, contains procedural, testing and work instructions, and makes risk assessments of the core processes. Each calibration laboratory has its own mark with its own number. This identification number includes a "K" for calibration laboratory. Testing laboratories have a "P" in their identification number; they usually issue test reports. If a customer wants the smallest uncertainties and a traceability certificate, he should look for the identifier "K".
Further information
- Here you will find further information about accredited calibration services for your measuring instruments from Mahr.
- Here you can find all current accreditation and certification certificates from Mahr.
- Do you have any questions? Contact us here.
