Strip Gage Patterns Vishay Micro-Measurements Special Purpose Sensors - Strip Gage Patterns A strip gage consists of ten strain-sensitive grids mounted on a common backing. This type of gage offers a number of advantages in the study of local strain distributions and strain gradients. As an example, it is much easier, faster, and more accurate to install the ten-grid strip in a single operation than it would be to align and bond ten individual gages for the same purpose. In addition, the optical tooling employed in the manufacture of the strip gage ensures that all grids are precisely located. Grid spacing is also closer than can usually be achieved with individual gages, thus yielding better resolution of nonuniform strain fields. Overall dimensions for the complete patterns vary with the grid and solder-tab configurations. When necessary, some types of the gages can be cut to produce smaller assemblies with fewer grids. Most sizes are offered in two different versions -- with all grids oriented either parallel to, or perpendicular to, the long axis of the strip. As indicated in the gage listings, several types of strip gages are designed with a common tab, or bus, connected to all grids on one side. Since this arrangement affects measurement accuracy, and may not be compatible with some instrument systems, the following information should be considered when contemplating the use of such gages. size shown. GAGE PATTERN Actual Enlarged when necessary for definition. ES = Each section CP = Complete pattern S = Section (S1= Sec 1) M = Matrix inch millimeter COMMON-TAB STRIP GAGES Common-tab strip gages are generally not compatible with multi-channel instruments, particularly those incorporating individual bridge excitation supplies. When used with this type of instrumentation, they will yield significantly lower accuracy than a strip gage with electrically independent grids. Effects of the common tab include excessive initial unbalance of the Wheatstone bridge circuit (possibly beyond the balance range of the instrumentation), circulating currents when the grids are powered simultaneously from a common power supply, loss of leadwire temperature compensation, and reduced accuracy in shunt calibration. All of these effects should be carefully considered by the user before selecting strip gages with common tabs. Where greatest accuracy is required, strip gages with electrically independent grids should be employed, or common-tab strip gages may be used with single-channel instruments in conjunction with a switch and balance unit. For further information, and practical recommendations on the use of common-tab strip gages, request Vishay MicroMeasurements Tech Note TN-516, Errors Due to Shared Leadwires in Parallel Strain Gage Circuits. GAGE DESIGNATION Insert desired S-T-C number in spaces marked XX. RES. IN OHMS Tolerance is increased when Option W, E, SE, LE, or P is specified. OPTIONS AVAILABLE Miniature ten-element strip gage for strain gradient determination. One tab common to all sections. Grid centerline spacing 0.035 in (0.89 mm). Similar to 020MT pattern but with grids rotated 90. Resistance is measured between a single point on the common tab, and each individual grid tab. 020PF 1X 2X GAGE LENGTH OVERALL LENGTH GRID WIDTH OVERALL WIDTH 0.020 ES 0.100 CP 0.030 ES 0.385 CP 0.51 ES 2.54 CP 0.76 ES 9.78 CP MATRIX SIZE 0.19L x 0.48W 4.8L x 12.2W 120 1.0% 120 2.0% E, SE, L, LE Miniature ten-element strip gage for strain gradient determination. One tab common to all sections. Grid centerline spacing 0.035 in (0.89 mm). Similar to 020PF pattern but with grids rotated 90. Resistance is measured between a single point on the common tab, and each individual grid tab. 020MT 1X 2X GAGE LENGTH OVERALL LENGTH GRID WIDTH OVERALL WIDTH 0.020 ES 0.385 CP 0.025 ES 0.100 CP 0.51 ES 9.78 CP 0.64 ES 2.54 CP MATRIX SIZE EA-XX-020PF-120 SA-XX-020PF-120 0.48L x 0.19W Document Number: 11514 Revision 10-Jan-03 12.2L x 4.8W EA-XX-020MT-120 SA-XX-020MT-120 micro-measurements@vishay.com 120 1.0% 120 2.0% E, SE, L, LE www.vishaymg.com 87 Strip Gage Patterns Vishay Micro-Measurements Special Purpose Sensors - Strip Gage Patterns size shown. GAGE PATTERN Actual Enlarged when necessary for definition. ES = Each section CP = Complete pattern S = Section (S1= Sec 1) M = Matrix inch millimeter 031MF OVERALL LENGTH GRID WIDTH OVERALL WIDTH 0.031 ES 0.790 CP 0.032 ES 0.080 CP 0.79 ES 20.07 CP 0.81 ES 2.03 CP 0.94L x 0.19W 23.9L x 4.8W 031MH OVERALL LENGTH GRID WIDTH OVERALL WIDTH 0.031/0.020 0.790 CP 0.032/0.070 0.080 CP 0.79/0.51 20.07 CP 0.81/1.78 2.03 CP 0.90L x 0.16W 22.9L x 4.1W 031MY OVERALL LENGTH GRID WIDTH OVERALL WIDTH 0.031 ES 0.790 CP 0.032 ES 0.080 CP 0.79 ES 20.07 CP 0.81 ES 2.03 CP www.vishaymg.com 88 EA-XX-031MF-120 SA-XX-031MF-120 120 0.5% 120 1.0% E, SE EA-XX-031MH-120 SA-XX-031MH-120 120 0.5% 120 1.0% E, SE Similar to 031MF pattern except produced in K alloy. GAGE LENGTH MATRIX SIZE OPTIONS AVAILABLE Similar to 031MF pattern except alternate grids perpendicular to long axis of pattern. Grid centerline spacings 0.090 and 0.070 in (2.29 and 1.78 mm) alternately. GAGE LENGTH MATRIX SIZE RES. IN OHMS Tolerance is increased when Option W, E, SE, LE, or P is specified. Miniature ten-element strip gage with electrically independent grids. All grids parallel to long axis of pattern. Grid centerline spacing 0.080 in (2.03 mm). See also 031PJ pattern. GAGE LENGTH MATRIX SIZE GAGE DESIGNATION Insert desired S-T-C number in spaces marked XX. 0.93L x 0.22W 23.6L x 5.6W SK-XX-031MY-120 micro-measurements@vishay.com 120 1.0% Document No: 11514 Revision 10-Jan-03 Strip Gage Patterns Vishay Micro-Measurements Special Purpose Sensors - Strip Gage Patterns size shown. GAGE PATTERN Actual Enlarged when necessary for definition. ES = Each section CP = Complete pattern S = Section (S1= Sec 1) M = Matrix inch millimeter 031PJ GAGE DESIGNATION Insert desired S-T-C number in spaces marked XX. RES. IN OHMS Tolerance is increased when Option W, E, SE, LE, or P is specified. OPTIONS AVAILABLE Miniature ten-element strip gage with electrically independent grids. All grids perpendicular to long axis of pattern. Grid centerline spacing 0.080 in (2.03 mm). See also 031MF pattern. GAGE LENGTH OVERALL LENGTH GRID WIDTH OVERALL WIDTH 0.031 ES 0.090 CP 0.070 ES 0.790 CP 0.79 ES 2.29 CP 1.78 ES 20.07 CP 0.17L x 0.90W MATRIX SIZE 4.3L x 22.7W 045PG EA-XX-031PJ-120 SA-XX-031PJ-120 120 0.5% 120 1.0% E, SE Miniature ten-element strip gage with electrically independent grids. All grids perpendicular to long axis of pattern. Grid centerline spacing 0.095 in (2.41 mm). GAGE LENGTH OVERALL LENGTH GRID WIDTH OVERALL WIDTH 0.045 ES 0.120 CP 0.085 ES 0.935 CP 1.14 ES 3.05 CP 2.16 ES 23.75 CP 0.21L x 1.00W MATRIX SIZE 5.3L x 25.4W EA-XX-045PG-120 EP-08-045PG-120 SA-XX-045PG-120 SK-XX-045PG-350 120 120 120 350 0.5% 0.5% 1.0% 1.0% E, SE Ten-element strip gage with one tab common to all sections. All grids parallel to long axis of pattern. Grid centerline spacing 0.080 in (2.03 mm). Resistance is measured across each grid. See 062MW pattern for more compact geometry. 062MD GAGE LENGTH OVERALL LENGTH GRID WIDTH OVERALL WIDTH 0.062 ES 0.795 CP 0.062 ES 0.350 CP 1.57 ES 20.19 CP 1.57 ES 8.89 CP MATRIX SIZE Document No: 11514 Revision 10-Jan-03 0.91L x 0.43W 23.1L x 10.9W EA-XX-062MD-120 EP-08-062MD-120 micro-measurements@vishay.com 120 0.5% 120 0.5% www.vishaymg.com 89 Strip Gage Patterns Vishay Micro-Measurements Special Purpose Sensors - Strip Gage Patterns size shown. GAGE PATTERN Actual Enlarged when necessary for definition. ES = Each section CP = Complete pattern S = Section (S1= Sec 1) M = Matrix inch millimeter GAGE DESIGNATION Insert desired S-T-C number in spaces marked XX. RES. IN OHMS Tolerance is increased when Option W, E, SE, LE, or P is specified. OPTIONS AVAILABLE Ten-element strip gage with one tab common to all sections. Similar to 062MD pattern but narrower geometry. All grids parallel to long axis of pattern. Grid centerline spacing 0.080 in (2.03 mm). Resistance is measured across each grid. 062MW GAGE LENGTH OVERALL LENGTH GRID WIDTH OVERALL WIDTH 0.062 ES 0.795 CP 0.050 ES 0.168 CP 1.57 ES 20.19 CP 1.27 ES 4.27 CP MATRIX SIZE 0.90L x 0.25W 22.9L x 6.4W EA-XX-062MW-120 EP-08-062MW-120 120 0.5% 120 0.5% Ten-element strip gage with one tab common to all sections. All grids parallel to long axis of pattern. Grid centerline spacing is 0.160 in (4.06 mm). Resistance is measured across each grid. 125MW HORIZONTAL POSITION GAGE LENGTH OVERALL LENGTH GRID WIDTH OVERALL WIDTH 0.125 ES 1.590 CP 0.100 ES 0.336 CP 3.18 ES 40.39 CP 2.54 ES 8.53 CP MATRIX SIZE www.vishaymg.com 90 1.68L x 0.43W 42.7L x 10.9W EA-XX-125MW-120 micro-measurements@vishay.com 120 0.5% Document No: 11514 Revision 10-Jan-03