Part of the CERTANIA Group
DAkkS-accredited calibration to DIN EN ISO/IEC 17025
Whether at our laboratory in Dortmund or directly on site at your premises – we calibrate your measuring and test equipment with traceability to the SI system of units, within a maximum of 10 working days by appointment.
The journey of your measuring and test equipment
From scheduled order to calibration certificate: a well-established process with clearly defined steps, so you can quickly resume work with your calibrated equipment.
Scheduled order & delivery
Quantity and delivery date are agreed in advance, and suitable laboratory capacity is reserved.
Goods receipt & inspection
Visual inspection, allocation and clarification of whether accredited or in-house calibration is required.
Calibration
At our laboratory in Dortmund or directly on site at your premises – using accredited or in-house procedures.
Evaluation & calibration certificate
Evaluation of the measurement results according to the level of confidence, followed by issuance of the calibration certificate.
Return shipment
Secure packaging and return shipment of your measuring and test equipment – within a maximum of 10 working days.
Accredited quantities & scope of accreditation
The official scope of our accreditation to DIN EN ISO/IEC 17025:2018, valid from May 7, 2025. We also offer accredited on-site calibration for a subset of these quantities directly at your premises.
For hardness and ultrasonic testing equipment, we are accredited with a flexible scope under Category III (in accordance with EA‑2/15). This allows us to update the underlying standards without prior approval from DAkkS. We maintain the current status in a publicly available list of procedures – see "Documents" below.
Illuminance meters
Photometry, standard illuminant AIrradiance meters
Radiometry, UV-A 365 nmUltrasonic testing equipment
All parameters identical in laboratory and on site · flexible accreditation, Category III| Parameter | Measuring range | Procedure | Expanded uncertainty |
|---|---|---|---|
| Gain linearity | 1–110 dB | DIN EN ISO 22232‑1:2021, group 2 | 0.18 dB |
| Vertical screen axis | 0–100 % FSH | DIN EN ISO 22232‑1:2021, group 2 | 0.58 % FSH |
| Accuracy of the calibrated attenuator | 1–110 dB | DIN EN 12668‑1:2010 (withdrawn), group 2 | 0.18 dB |
| Vertical axis linearity | 0–100 % FSH | DIN EN 12668‑1:2010 (withdrawn), group 2 | 0.58 % FSH |
| Time axis linearity | 2 ns–2 ms | DIN EN 12668‑1:2010 (withdrawn), group 2 | 10 ns / 0.080 % FSW |
Ultrasonic wall thickness gauges
Length (wall thickness) · flexible accreditation, Category III| Measuring range | Procedure | Expanded uncertainty |
|---|---|---|
| 1–100 mm | DIN EN 15317:2014, group 2 | 0.020 mm |
| 1–100 mm | DIN EN ISO 16831:2025 | 0.020 mm |
Magnetic field strength meters
DC fieldMagnetic field strength meters
AC field, 50 HzWe also calibrate measurement points outside the accredited range, from 0.2 to 8.0 kA/m – indicated accordingly on the calibration certificate.
Hardness testers (UCI method)
HV 1 / HV 5 / HV 10 · flexible accreditation, Category IIIHardness testers (Leeb method)
Impact body D · flexible accreditation, Category IIIUCRM = calibration uncertainty of the hardness reference block used. The standard measurement points listed are our most common test points – on request, we also calibrate at other points within the accredited measuring range. Measurement points outside our accreditation scope are also available on request as in-house calibration. The full, flexible accreditation scope with all standards referenced can be found in the certificate annexes below. Our non-accredited range of services, including further on-site services, can be found under Service.
Accreditation certificate & scope of accreditation
Valid from May 7, 2025 · verified and monitored by the German accreditation body (DAkkS).
Accreditation certificate
The main annex to the accreditation certificate under DIN EN ISO/IEC 17025:2018.
View PDF → D‑K‑20476‑01‑01Scope: optics, length & magnetics
Radiometry, photometry, length measuring instruments and magnetic field strength, including CMC tables.
View PDF → D‑K‑20476‑01‑02Scope: hardness (WPM)
Hardness testers using UCI and Leeb methods, including CMC tables for laboratory and on-site calibration.
View PDF → 5._03 · AS OF 03.02.2026List of flexible accredited procedures
Category III: currently applied standards for hardness and ultrasonic testing equipment, publicly available in accordance with EA‑2/15.
View PDF →You can also view the current, monitored status of our accreditation at any time directly in the DAkkS database of accredited bodies (German).
In-house calibration & inspection
We perform in-house calibrations and functional inspections using traceable reference material – according to our own and international procedures, at our laboratory and, for many devices, on site as well.
In-house calibrations
Traceable, using certified reference material| Procedure / calibration item | Applicable standards and regulations |
|---|---|
| Densitometer | ASTM E1079‑16 |
| Coating thickness (non-magnetic coatings on magnetic base metals) | DIN EN ISO 2178:2016 |
| Coating thickness (non-conductive coatings on non-magnetic metallic base materials) | DIN EN ISO 2360:2004 |
| Reference block No. 1 / calibration block K1 | DIN EN ISO 2400, DIN EN ISO 16946 |
| Calibration block No. 2 / K2 | DIN EN ISO 7963, DIN EN ISO 16946 |
| Step wedge | DIN EN ISO 16946 |
| Reference block 2 | DIN EN ISO 3452‑3 |
| Luminance meter | BS 667:2005 Annex B 2.2 |
| Ultrasonic equipment (analog, digital) | DIN EN 12668‑1:2010 (withdrawn), DIN EN ISO 22232‑1:2021 |
| Phased array equipment (in-house portion) | DIN EN 18563‑3:2024 |
| Crack depth gauge | DIN EN ISO 15548‑1 |
Inspections
Functional inspection to confirm correct operation| Procedure / inspection item | Applicable standards and regulations |
|---|---|
| Film viewer (viewing devices for industrial radiography) | DIN EN ISO 5580:2024, ASTM E1390:2021 |
| Yoke magnet | DIN EN ISO 9934‑3:2015, DGUV V3 |
| Magnetic test bench | DIN EN ISO 9934‑3:2015, DGUV V3 |
| Magnetizing device | DIN EN ISO 9934‑3:2015, DGUV V3 |
| Irradiance lamp (UV lamp) | DIN EN ISO 9934‑3:2015 |
| Reference block 1 (MTU test disc) | DIN EN ISO 9934‑2:2015 |
| Reference block type 1 / type 2 | DIN EN ISO 3452‑3 |
| FLUXA test block | DIN EN ISO 3059:2002 |
| Eddy current device | DIN EN ISO 15548‑3, DGUV V3 |
On-site calibration – we come to you!
Downtime and immobility: two key arguments for on-site calibrationIn-house calibration certificates do not meet the requirements of the EA MLA. Detailed information on our on-site services can be found under Service.
Missed the deadline? No problem.
Coordinate quantity and delivery date of your measuring and test equipment with us in advance – we reserve the appropriate laboratory capacity. Calibration within a maximum of 10 working days.
Request an appointment →