GTM develops and manufactures strain-gauge-based force, torque and multi-component transducers, measuring systems, and offers accredited calibration services.
GTM Testing and Metrology GmbH
Bickenbach · Prague · ShanghaiNew on Amplifa
About GTM Testing and Metrology
GTM Testing and Metrology GmbH, headquartered in Bickenbach (Hesse), develops and manufactures strain-gauge-based precision transducers for measuring forces, torques and multi-component loads. The product portfolio comprises force transducers (5 N to 10 MN), non-rotating torque transducers, multi-component transducers and measuring platforms (Engineered to Order), strain-gauge measuring amplifiers, transfer standards as well as turnkey metrological measuring systems for force, torque and multi-component applications. Materials used are precipitation-hardening steel, high-strength aluminium alloys and stainless steel. In addition to product development, GTM operates a calibration laboratory in Bickenbach accredited by DAkkS to DIN EN ISO/IEC 17025, including a 10-MN tension-compression force measuring system; in 2005 the laboratory received the first worldwide accreditation for the calibration of multi-component transducers. The products are used in materials and substance testing, component testing, quality and process control as well as at national metrology institutes. Further locations are GTM Praha s.r.o. in Prague and a sales office in Shanghai; the company is part of the ZwickRoell group.
- Site
- Bickenbach
- Processes
- Calibration of force transducers (force calibration service), Calibration of torque transducers (non-rotating), Calibration of multi-component transducers, Calibration of output ratios (mV/V) of strain-gauge measuring amplifiers, Force measuring system FCM RT (fully automated force calibration machine, calibration to ISO 376,, Development and manufacturing of force transducers (strain-gauge-based), Development and manufacturing of torque transducers (non-rotating, strain-gauge-based), Development and manufacturing of multi-component transducers and multi-component measuring platforms
- Materials
- precipitation-hardening steel, high-strength aluminium alloy, stainless steel, strain gauge technology (SG)
- Certificates
- DIN EN ISO/IEC 17025 (DAkkS, calibration laboratory: force, torque,, DIN EN ISO/IEC 17025 (DAkkS)
- Founded
- 1988
- Industries
- Materials and substance testing, Component testing, Quality and process control, Automotive and transport industry, Aerospace, Rail and track technology
- 01
Design & development (Engineered to Order)
- 02
Manufacturing of transducers (strain-gauge-based)
- 03
Manufacturing of turnkey metrological measuring systems
- 04
DAkkS-accredited calibration (force, torque, multi-component,
- 05
On-site calibration to DIN EN ISO/IEC 17025
- 06
Service & repair
Materials & Processes
precipitation-hardening steel
Used as measuring-body material in force transducers (e.g. Series K).
high-strength aluminium alloy
Material for Series K force transducers with high dynamics and low mass.
stainless steel
Used in force transducers (e.g. Series DR) for corrosive and demanding environments.
strain gauge technology (SG)
Measuring principle of all GTM force, torque and multi-component transducers.
Locations
Bickenbach
DEHeadquarters, development, production, DAkkS-accredited calibration laboratory
- Materials
- precipitation-hardening steel, high-strength aluminium alloy, stainless steel
- Force measuring system FCM RT (20–250 kN)
- Deadweight force measuring system 0.1–500 kN
- Lever-arm force measuring system 0.1–500 kN
- Lever-amplified force measuring system 1–2000 kN
- Hydraulic force measuring system 500–10,000 kN
- Tension-compression force measuring system 10 MN
- Deadweight torque measuring system 0.1–20 kN·m
- Lever-arm torque measuring system 1–5,000 N·m
Prague (Praha 9)
CZSite GTM Praha s.r.o.
Shanghai
CNSales office GTM China Office
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Calibration of force transducers (force calibration service)Testing | – | – | – | – | – |
| Calibration of torque transducers (non-rotating)Testing | – | – | – | – | – |
| Calibration of multi-component transducersTesting | – | – | – | – | – |
| Calibration of output ratios (mV/V) of strain-gauge measuring amplifiersTesting | 10 to 100 ppm | – | – | – | – |
| Force measuring system FCM RT (fully automated force calibration machine, calibration to ISO 376,Testing | ≤ 0.1 % or 0.2 % (k=2) | – | – | – | – |
| Development and manufacturing of force transducers (strain-gauge-based)Engineering | – | – | – | – | precipitation-hardening steel, high-strength aluminium alloy, stainless steel |
| Development and manufacturing of torque transducers (non-rotating, strain-gauge-based)Engineering | – | – | – | – | – |
| Development and manufacturing of multi-component transducers and multi-component measuring platformsEngineering | – | – | – | – | – |
| Manufacturing of metrological measuring systems (force: deadweight, lever-arm, lever-amplified,Engineering | Deadweight 0.001-0.01 %; lever-arm 0.01-0.05 %; | – | – | – | – |
| On-site calibration to DIN EN ISO/IEC 17025 (procedure AA0045) for FCM RTTesting | – | – | – | – | – |
8 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Force measuring system (calibration machine) FCM RT, reference method | GTM FCM RT | – | Force range 20-250 kN (frame rated loads 20/50/100/250 kN); reference transducers 5-250 kN | – | Bickenbach / delivered product |
| Deadweight force measuring system | GTM | – | Force range 0.1-500 kN; measurement uncertainty 0.001-0.01 % | – | Calibration laboratory Bickenbach |
| Lever-arm force measuring system | GTM | – | Force range 0.1-500 kN; measurement uncertainty 0.01-0.05 % | – | Calibration laboratory Bickenbach |
| Lever-amplified force measuring system | GTM | – | Force range 1-2000 kN; measurement uncertainty <0.002-0.01 % | – | Calibration laboratory Bickenbach |
| Hydraulic force measuring system | GTM | – | Force range 500-10,000 kN; measurement uncertainty 0.02-0.05 % | – | Calibration laboratory Bickenbach |
| Tension-compression force measuring system 10 MN (largest privately owned worldwide) | GTM | 1 | 10 MN | – | Calibration laboratory Bickenbach |
| Deadweight torque measuring system | GTM | – | Torque range 0.1-20 kN·m; measurement uncertainty 0.002-0.01 % | – | Calibration laboratory Bickenbach |
| Lever-arm torque measuring system | GTM | – | Torque range 1-5,000 N·m; measurement uncertainty 0.01-0.05 % | – | Calibration laboratory Bickenbach |
Additional services
Reference customers
Quality & Accreditation
The calibration laboratory in Bickenbach is accredited by the German Accreditation Body (DAkkS) to DIN EN ISO/IEC 17025 for force, torque and multi-component transducers as well as for output ratios of strain-gauge measuring amplifiers. GTM is a supplier to the Physikalisch-Technische Bundesanstalt (PTB).
| Evidence | Bickenbach |
|---|---|
| DIN EN ISO/IEC 17025 (DAkkS) |
History
- 1988
Founding of GTM
- 2005
First worldwide accreditation for the calibration of multi-component transducers