{"title":"Strain Measurement \u0026 Strain Gauges","description":"\u003ch2\u003eStrain Measurement and Strain Gauges\u003c\/h2\u003e \u003cp\u003eNot every force can be measured with a transducer in the force flow. If there is no space for a load cell or an existing component is to be converted into a sensor retrospectively, the strain of the structure is measured directly.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\n\u003cstrong\u003eClamp-on and screw-on strain transducers\u003c\/strong\u003e for mounting on existing components, without gluing\u003c\/li\u003e \u003cli\u003e\n\n\u003cstrong\u003eStrain gauges\u003c\/strong\u003e in full bridge, half bridge, and as rosettes\u003c\/li\u003e \u003cli\u003e\n\n\u003cstrong\u003eApplication accessories\u003c\/strong\u003e – adhesives, potting compounds, soldering terminals\u003c\/li\u003e \u003cli\u003e\n\n\u003cstrong\u003eMeasuring amplifiers\u003c\/strong\u003e suitable for bridge circuits, see \u003ca href=\"\/en\/collections\/dms-messverstaerker\"\u003eStrain Gauge Measuring Amplifiers\u003c\/a\u003e\n\n\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eStrain Gauge Application as a Service\u003c\/h3\u003e \u003cp\u003eThe quality of a strain measurement is determined during application. We apply strain gauges by gluing or welding, even in hard-to-reach places and when installed – details under \u003ca href=\"\/en\/pages\/dehnungsmessstreifen-dms-applikation\"\u003eStrain Gauge Application\u003c\/a\u003e.\u003c\/p\u003e \u003cp\u003eAdditionally, we conduct experimental \u003ca href=\"\/en\/pages\/experimentelle-eigenspannungsanalysen\"\u003eresidual stress analyses\u003c\/a\u003e. This category is not yet populated with items – please inquire via \u003ca href=\"\/en\/pages\/contact\"\u003eContact\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"dkfa-alternative-dehnungsmessstreifen-dms-magnethalter","title":"DKFA alternative to bonded strain gauges – magnetic holder","description":"\u003cp\u003eSurface strain measured without glue: two springs and two knurled screws press the \u003cstrong\u003eStrainPad\u003c\/strong\u003e – an encapsulated foil strain gauge of 10 mm diameter and 0.2 mm height – so firmly against a ferromagnetic surface that friction takes over the task of the adhesive.\u003c\/p\u003e\n\u003cp\u003eWhat the gauge then reads is the surface strain, in the same quality as a bonded gauge, and it reads it within seconds instead of the three quarters of an hour a bonded gauge needs to be prepared, glued and cured. The holder is taken off as quickly as it went on and used again on the next measuring point; nothing is drilled, nothing is ground, nothing is consumed. It cannot be overloaded – instead of damage an offset appears.\u003c\/p\u003e\n\u003ch2\u003eMeasurement\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDirect reading of the surface strain, like a bonded strain gauge\u003c\/li\u003e\n\u003cli\u003eMaximum strain ± 800 µm\/m\u003c\/li\u003e\n\u003cli\u003e350 Ω foil gauge, k = 2.0 ± 3 %\u003c\/li\u003e\n\u003cli\u003eUniaxial, 0.6 mm constantan grid, polyimide encapsulation, Ø 10 mm at 0.2 mm height\u003c\/li\u003e\n\u003cli\u003eAccuracy \u0026lt; ± 0.5 % of full scale, transverse sensitivity −0.1 %\u003c\/li\u003e\n\u003cli\u003eCannot be overloaded – an offset appears instead of damage\u003c\/li\u003e\n\u003cli\u003e1,000,000 load cycles at 300 µm\/m strain\u003c\/li\u003e\n\u003cli\u003ePassive – no amplifier inside; recommended bridge voltage 1 V, 10 V at most\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMounting and use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHolds magnetically – no drilling, grinding or gluing\u003c\/li\u003e\n\u003cli\u003eMounted and removed in seconds, reusable\u003c\/li\u003e\n\u003cli\u003eContact force 100 … 300 N, settling time 15 minutes\u003c\/li\u003e\n\u003cli\u003eSmallest radius of curvature 3 mm\u003c\/li\u003e\n\u003cli\u003eOperating temperature 5 … 60 °C, reference temperature 23 °C\u003c\/li\u003e\n\u003cli\u003eTemperature matching of 10.8·10⁻⁶ 1\/K for ferritic steel is possible\u003c\/li\u003e\n\u003cli\u003eHolders made of aluminum\u003c\/li\u003e\n\u003cli\u003eFor dynamic applications, for checking FEM calculations and for stress analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eVersions\u003c\/h2\u003e\n\u003cp\u003eShown is the magnet holder with StrainPad. Other standard holders are available and individual ones are built to the application. Tell us the measuring point and we will name the holder that fits.\u003c\/p\u003e","brand":"octogon Shop","offers":[{"title":"Default Title","offer_id":57266202935622,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/DKFA_DGA__produkt_0e065bd4-190a-400c-b447-253f91633517.png?v=1790091881"},{"product_id":"dkfb-dehnungsmessring-fuer-runde-holme","title":"DKFB strain measuring ring for round tie bars","description":"\u003cp\u003eStrain measured on a round tie bar without glue and without calibration: the \u003cstrong\u003ering\u003c\/strong\u003e clamps around the bar with two screws and presses foil strain gauges, protected under a stainless steel foil, against the surface so firmly that friction carries the surface strain into the gauges.\u003c\/p\u003e\n\u003cp\u003eIt replaces the bonding a strain gauge otherwise needs, and with it the three quarters of an hour, the chemical cleaning and the grinding – the measuring location only has to be free of loose material such as rust or flaking paint, and a solvent is enough. It works on any round bar, magnetic or not.\u003c\/p\u003e\n\u003ch2\u003eMeasurement\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eReads the surface strain of the bar directly, like a bonded gauge\u003c\/li\u003e\n\u003cli\u003eRange ± 1000 µε, accuracy and linearity each \u0026lt; ± 0.5 % of full scale\u003c\/li\u003e\n\u003cli\u003eHysteresis \u0026lt; ± 0.2 %, repeatability \u0026lt; ± 0.1 %\u003c\/li\u003e\n\u003cli\u003eFoil gauge, GF = 2.0, 350 Ω bridge – usable without a calibration of its own\u003c\/li\u003e\n\u003cli\u003eSensitivity tolerance ± 0.2 %, transverse sensitivity 0.9 ± 0.2 %\u003c\/li\u003e\n\u003cli\u003eTwo versions: 2\/4 bridge with two active gauges, or full bridge, the latter only with cable and connector\u003c\/li\u003e\n\u003cli\u003eCannot be overloaded – an offset appears instead of damage\u003c\/li\u003e\n\u003cli\u003eSupply 5 V DC, 8 V DC at most, current draw below 15 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMounting and use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eClamped around the bar with two screws at 3 N·m – no adhesive, no drilling\u003c\/li\u003e\n\u003cli\u003eWorks on any round bar, magnetic or not\u003c\/li\u003e\n\u003cli\u003eNo chemical cleaning, no grinding – a solvent is enough; loose material such as rust or flaking paint has to go first\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e34 bar diameters from 50 to 400 mm\u003c\/strong\u003e, set in the order key\u003c\/li\u003e\n\u003cli\u003eOperating and storage temperature 0 … +55 °C\u003c\/li\u003e\n\u003cli\u003eProtection IP66 with connection C, IP40 with connection D\u003c\/li\u003e\n\u003cli\u003eAnodized aluminum housing, stainless steel cover\u003c\/li\u003e\n\u003cli\u003eCable lengths 0.5 m, 3 m, 5 m and 10 m – connection C only\u003c\/li\u003e\n\u003cli\u003eMade for cyclical measurement, such as clamping force on presses\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat you need with it\u003c\/h2\u003e\n\u003cp\u003eThe ring is \u003cstrong\u003epassive\u003c\/strong\u003e and needs an external amplifier. After mounting, the zero offset of the pressed-on gauges is high – an amplifier that resets it at the push of a button or by a signal therefore belongs to the measuring chain.\u003c\/p\u003e\n\u003cp\u003eThe ring is made to the bar diameter ordered. Beside the product code, its nameplate carries a type key of diameter, bridge, connection and cable length.\u003c\/p\u003e","brand":"octogon Shop","offers":[{"title":"Default Title","offer_id":57266202968390,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/DKFB_DGB_Ringhalter__octogon-DKFB-einzeln-1050x700_417e7fdc-1b75-46ff-9785-ec3e55b0e2eb.png?v=1789021157"},{"product_id":"dkfc-alternative-dehnungsmessstreifen-ohne-kleben-messring","title":"DKFC alternative to bonded strain gauges – no adhesive – measuring ring","description":"\u003cp\u003eClamping force read on the tie bar itself: two stainless steel belts hold the \u003cstrong\u003eDKFC\u003c\/strong\u003e around the bar and press the foil strain gauges, protected under a stainless film, so firmly against the surface that friction takes over the task of the adhesive.\u003c\/p\u003e\n\u003cp\u003eThe reading is the surface strain, in the same quality as a bonded gauge, and it is available within minutes instead of the better part of an hour. One sensor covers every tie bar from 25 to 400 mm – only the pair of belts changes with the diameter, and it changes every 2.5 mm of it. Mounting is non-destructive: nothing is drilled, welded or glued, and a sensor taken off one machine goes onto the next without being recalibrated. A tie bar fitted with one becomes a load cell in its own right.\u003c\/p\u003e\n\u003ch2\u003eMeasurement\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDirect reading of the surface strain, like a bonded strain gauge\u003c\/li\u003e\n\u003cli\u003eRange ± 1000 µε, high accuracy and linearity in tension and compression\u003c\/li\u003e\n\u003cli\u003e350 Ω foil bridge, GF = 2.0\u003c\/li\u003e\n\u003cli\u003eSensitivity tolerance ± 0.2 %, hysteresis \u0026lt; ± 0.2 %, repeatability \u0026lt; 0.1 % of full scale\u003c\/li\u003e\n\u003cli\u003e2\/4 bridge or 4\/4 full bridge, depending on version\u003c\/li\u003e\n\u003cli\u003eCannot be overloaded – an offset appears; the sensor is reset cyclically\u003c\/li\u003e\n\u003cli\u003eSupply 5 V DC, 8 V DC at most, current draw below 15 mA\u003c\/li\u003e\n\u003cli\u003eStatic and dynamic applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMounting and use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTwo stainless steel belts, 10 × 0.4 mm – no drilling, welding or gluing\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOne sensor for tie bars from 25 to 400 mm\u003c\/strong\u003e; one pair of belts per diameter, tolerance ± 2.5 mm\u003c\/li\u003e\n\u003cli\u003eTightening torque 2.0 N·m on the M4 screws, surface finish N7\u003c\/li\u003e\n\u003cli\u003eNon-destructive, quick and repeatable\u003c\/li\u003e\n\u003cli\u003eNo recalibration between removal and refitting\u003c\/li\u003e\n\u003cli\u003eProtection IP64, anodized aluminum housing\u003c\/li\u003e\n\u003cli\u003eCable 2 × PVC, screened, 2 × 0.14 mm², Ø 3.5 mm\u003c\/li\u003e\n\u003cli\u003eSix-pin connector or open ends with the 2\/4 bridge; lengths 0.5 m, 3 m, 5 m and 10 m\u003c\/li\u003e\n\u003cli\u003eFor presses, injection molding and die casting machines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat you need with it\u003c\/h2\u003e\n\u003cp\u003eThe sensor is \u003cstrong\u003epassive\u003c\/strong\u003e and works into any strain gauge amplifier; the VDA and DU families are the matching ones. The belts that hold the sensor on the bar depend on the diameter and are ordered separately – tell us the bar diameter and we will include the right pair.\u003c\/p\u003e","brand":"octogon Shop","offers":[{"title":"Default Title","offer_id":57266203001158,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/DKFC_GE1029__titelbild_d7cc8a09-2b3a-4a15-8a0f-20d99e0ea8eb.png?v=1790091880"},{"product_id":"dsga-aufschraub-dehnungsaufnehmer","title":"DSGA bolt-on strain transducer","description":"\u003cp\u003eWhere no load cell fits, the structure itself becomes the sensor: the \u003cstrong\u003eDSGA\u003c\/strong\u003e is bolted to the machine through four holes of Ø 6.6 mm and reads the strain of the part it sits on. That makes it the instrument for large equipment – presses, frames, columns, cranes – and for every place where cutting a load cell into the force path is out of the question.\u003c\/p\u003e\n\u003cp\u003eThe measuring element is a full bridge on a stainless steel body of 89 × 25.4 mm, rated at 1.0 mV\/V and available for 200, 500, 1000 or 1500 µε. It takes 5 to 10 V DC, tolerates 120 % of its range without harm and 150 % before it is destroyed, and it carries six meters of fixed cable, sealed to IP65. Mounting and replacing are a matter of four screws, and nothing in the force path has to be opened to do it.\u003c\/p\u003e\n\u003ch2\u003eMeasurement\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eReads the strain of the structure directly\u003c\/li\u003e\n\u003cli\u003eCapacities 200, 500, 1000 and 1500 µε\u003c\/li\u003e\n\u003cli\u003eRated output 1.0 ± 15 % mV\/V\u003c\/li\u003e\n\u003cli\u003eNon-linearity, hysteresis and repeatability ± 1 % of RO each\u003c\/li\u003e\n\u003cli\u003eCombined error ≤ ± 1.41 % of RO\u003c\/li\u003e\n\u003cli\u003eFull bridge, 5 … 10 V DC excitation\u003c\/li\u003e\n\u003cli\u003eSafe overload 120 %, ultimate 150 % of RO\u003c\/li\u003e\n\u003cli\u003ePassive – no amplifier inside\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMounting and use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBolted on through four holes Ø 6.6 mm, hole spacing 76.2 mm lengthwise and 14.3 mm across\u003c\/li\u003e\n\u003cli\u003eStainless steel body 89 × 25.4 × 6.4 mm; at 1500 µε the body is 14 mm thick\u003c\/li\u003e\n\u003cli\u003eIP65, cable Ø 3 mm, 6 m, fixed\u003c\/li\u003e\n\u003cli\u003eOperating temperature −20 … +80 °C, compensated −10 … +40 °C\u003c\/li\u003e\n\u003cli\u003eWeight 0.5 kg\u003c\/li\u003e\n\u003cli\u003eFactory calibration included\u003c\/li\u003e\n\u003cli\u003eHigh-temperature version −40 … 250 °C and ISO 17025 calibration on request\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe transducer is passive and works with any strain gauge amplifier. CE and RoHS are declared by the manufacturer.\u003c\/p\u003e","brand":"octogon Shop","offers":[{"title":"Default Title","offer_id":57266203033926,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/DSGA_FJ46__produkt_b4d4e877-5b47-4b25-b724-c2904a56999e.png?v=1790091215"},{"product_id":"dkfd-alternative-dehnungsmessstreifen-dms-dehnungssensor","title":"DKFD alternative to bonded strain gauges – strain sensor","description":"\u003cp\u003eSurface strain measured where it arises, without glue: the \u003cstrong\u003estrain sensor\u003c\/strong\u003e DKFD is the \u003cstrong\u003ealternative\u003c\/strong\u003e to the bonded strain gauge. It holds itself on a ferromagnetic surface by its own magnet and presses the foil strain gauge, protected under a stainless steel foil, so firmly against the surface that friction takes over the task of the adhesive.\u003c\/p\u003e\n\u003cp\u003eMounting takes seconds instead of the three quarters of an hour a bonded gauge needs. The surface is neither cleaned nor ground, and coats of paint do not stop the reading. Calibrated to GF = 2.00, the sensor reads tension and compression directly and can be exchanged without recalibrating the amplifier. It cannot be overloaded – an offset appears instead of damage – and it is used again. The usual instrument for checking FEM calculations and for stress analysis on flat steel structures.\u003c\/p\u003e\n\u003ch2\u003eMeasurement\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDirect reading of the surface strain, like a bonded strain gauge\u003c\/li\u003e\n\u003cli\u003eMeasuring range ± 300 … ± 500 µε, depending on the surface\u003c\/li\u003e\n\u003cli\u003eFoil strain gauge with GF = 2.0, bridge resistance 350 Ω\u003c\/li\u003e\n\u003cli\u003eOne quarter bridge active, 350 Ω completion resistor in the connector\u003c\/li\u003e\n\u003cli\u003eAccuracy and linearity each \u0026lt; ± 0.5 % of RO\u003c\/li\u003e\n\u003cli\u003eSensitivity tolerance ± 0.2 %, transverse sensitivity 0.9 ± 0.2 %\u003c\/li\u003e\n\u003cli\u003eCalibrated to GF = 2.00 for dynamic applications\u003c\/li\u003e\n\u003cli\u003ePassive – external amplifier recommended, such as MBA100, VDA or Monitor DU-1D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMounting and use\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMounted and removed in seconds with the tool included\u003c\/li\u003e\n\u003cli\u003eHolds on magnetic structures – no adhesive, no screws, no drilling\u003c\/li\u003e\n\u003cli\u003eThe surface needs neither cleaning nor grinding, and the reading passes through coats of paint\u003c\/li\u003e\n\u003cli\u003eSensors are interchangeable without recalibrating the amplifier\u003c\/li\u003e\n\u003cli\u003eReusable – no single-use material, no consumables\u003c\/li\u003e\n\u003cli\u003eSteel housing Ø 34 mm, 36 mm high, protection IP54\u003c\/li\u003e\n\u003cli\u003eSupply 5 V DC, 8 V DC at most, current draw below 15 mA\u003c\/li\u003e\n\u003cli\u003eOperating temperature 0 … +50 °C, storage 0 … +70 °C\u003c\/li\u003e\n\u003cli\u003eWeight including cable 200 g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCable lengths\u003c\/h2\u003e\n\u003cp\u003e3 m as standard; 0.5 m, 5 m and 10 m are available, as is any intermediate length from 0.5 to 10 m. The connection is a six-pin connector, where 350 Ω can be measured across the bridge.\u003c\/p\u003e\n\u003cp\u003eSupplied with the sensor, cable and connector and the mounting tool, Ø 16 mm and 125 mm long. CE and UKCA are declared, RoHS for the whole range.\u003c\/p\u003e","brand":"octogon Shop","offers":[{"title":"Default Title","offer_id":57427213517126,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/DKFD_QE1010__produkt_16f839b8-745b-48d9-ba3b-2615f62870b3.png?v=1790091215"}],"url":"https:\/\/octogon.org\/en\/collections\/strain-measurement.oembed","provider":"octogon GmbH","version":"1.0","type":"link"}