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Construction:

Arrangement (If Applicable):

Specialty Applications:

Active Gauge Length (Grid Length):

Number of Gauges in Gauge Pattern:

Operating Temperature:

Allow up to: overrange/margin
Use the overrange/margin to restrict your search to items whose full-scale range is close to your requirements.
(Overrange/margin requires both 'From' and 'To' values to work.)

Gage Factor:

Nominal Resistance:

Strain-Sensitive Material (If Applicable):

Termination Options:

Cryogenic Use?

Embeddable?

Encapsulated?

Waterproof?

Weldable?

Help with Strain Gauges specifications:

Gauge Pattern
   Construction       
   Your choices are...         
   Electrical Resistance       The resistance of an electrically conductive material changes with dimensional changes that take place when the conductor is deformed elastically. When such a material is stretched, the conductors become longer and narrower, which causes an increase in resistance. A Wheatstone bridge then converts this change in resistance to an absolute voltage. The resulting value is linearly related to strain by a constant called the gauge factor. 
   Capacitance       Capacitance devices, which depend on geometric features, can be used to measure strain. Changing the plate area, or the gap can vary the capacitance. The electrical properties of the materials used to form the capacitor are relatively unimportant, so capacitance strain gauge materials can be chosen to meet the mechanical requirements. This allows the gauges to be more rugged, providing a significant advantage over resistance strain gauges. 
   Photoelectric       A beam of light is passed through a variable slit, actuated by the extensometer, and directed to a photoelectric cell. As the gap opening changes, the amount of light reaching the cell varies, causing a varying intensity in the current generated by the cell. 
   Semiconductor (Piezoresistive)       In ferroelectric materials, such as crystalline quartz, a change in the electronic charge across the faces of the crystal occurs when the material is mechanically stressed. The piezoresistive effect is defined as the change in resistance of a material due to an applied stress and this term is used commonly in connection with semi conducting materials. The resistivity of a semiconductor is inversely proportional to the product of the electronic charge, the number of charge carriers, and their average mobility. The effect of applied stress is to change both the number and average mobility of the charge carriers. By choosing the correct crystallographic orientation and dopant type, both positive and negative gauge factors may be obtained. Silicon is now almost universally used for the manufacture of semiconductor strain gauges. 
   Optical       Photoelastic Strain Gauges When a photo elastic material is subjected to a load and illuminated with polarized light from the measurement instrumentation (called a reflection polariscope), patterns of color appear which are directly proportional to the stresses and strains within the material. The sequence of colors observed as stress increases is: black (zero stress), yellow, red, blue-green, yellow, red, blue-green, yellow, red, etc. The transition lines seen between the red and green bands are known as "fringes." The stresses in the material increase proportionally as the number of fringes increases. Closely spaced fringes means a steeper stress gradient, and uniform color represents a uniformly stressed area. Hence, the overall stress distribution can easily be studied by observing the numerical order and spacing of the fringes. Furthermore, a quantitative analysis of the direction and magnitude of the strain at any point on the coated surface can be performed with the reflection polariscope and a digital strain indicator. Moire Interferometry Strain Gauges Moire interferometry is an optical technique that uses coherent laser light to produce a high contrast, two-beam optical interference pattern. Moire interferometry reveals planar displacement fields on a part's surface, which is caused by external loading or other source deformation. It responds only to geometric changes of the specimen, and is effective for diverse engineering materials. Contour maps of planar deformation fields can be generated from x and y components of displacements. Holographic Interferometry Strain Gauges Holographic interferometry allows the evaluation of strain, rotation, bending, and torsion of an object in three dimensions. Since holography is sensitive to the surface effects of an opaque body, extrapolation into the interior of the body is possible in some circumstances. In one or more double-exposure holograms, changes in the object are recorded. From the fringe patterns in the reconstructed image of the object, the interference phase-shift for different sensitivity vectors are measured. A computer is then used to calculate the strain and other deformations. 
   Fiber Optic       The sensor measures the strain by shifting the light frequency of the light reflected down the fiber from the Bragg grating, which is embedded inside the fiber itself. Since it is possible to put several sensors on the same fiber, the amount of cabling required is reduced significantly compared to other types of strain gauges. Also, since the signal is optical rather than electronic, it is not affected by electromagnetic interference. 
   Other       Other unlisted, specialized, or proprietary strain gauge construction. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Arrangement (If Applicable)      The gage pattern refers cumulatively to the shape of the grid, the number and orientation of the grids in a multiple-grid (rosette) gage, the solder tab configuration, and various construction features that are standard for a particular pattern.
   Your choices are...         
   Uniaxial       Single grid strain gauge to measure strain in a single direction only. 
   Dual Linear       A double linear strain gauge is typically used for bending-beam type applications and has two gages that are parallel, so they sense strain in the same direction. 
   Strip Gauges       A strip gage consists of several 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.  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. 
   Diaphragm       Strain gages are frequently used in pressure transducers incorporating a circular diaphragm as the spring element.  They are typically designed around a full bridge pattern. 
   Tee Rosette       Two mutually perpendicular grids (0-90°). The tee rosette should be used only when the principal strain directions are known in advance from other considerations. Cylindrical pressure vessels and shafts in torsion are two classical examples of the latter condition. 
   Rectangular Rosette       Three grids, with the second and third grids angularly displaced from the first grid by 45° and 90°, respectively. Rectangular and delta rosettes may appear in any of several geometrically different, but functionally equivalent, forms. 
   Delta Rosette       Three grids, with the second and third grids 60° and 120° away, respectively, from the first grid. Rectangular and delta rosettes may appear in any of several geometrically different, but functionally equivalent, forms. 
   Other       Other unlisted, specialized, or proprietary arrangement of gauge pattern. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Specialty Applications       
   Your choices are...         
   Crack Detection       Convenient, economical method of detecting cracks or crack growth. 
   Crack Propagation       Multiple conducting grids on a single backing accurately indicate the rate of crack propagation.  Crack gauges are designed to be bonded to structures or materials under testing to measure the propagation length and speed of an expected or existing crack. 
   Extensometer       An apparatus for indicating the deformation of metal while it is subjected to stress. 
   Measures Temperature       Strain gauge includes resistive sensors, constructed much like a strain gage but with nickel or nickel/manganin grids, used to measure the surface temperature of test specimens to which they are bonded. 
   Residual Stress       Residual stress rosettes for the practical, widely used hole-drilling method of residual stress determination. 
   Shear Modulus Gauges       Shear modulus gauges for accurately determining the shear modulus of composite materials. 
   Transducer Gauge       Transducer strain gauges are specifically manufactured for use in force, torque, pressure, and other transducers.  
   Other       Other unlisted, specialized, or proprietary specialty applications. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Physical Specifications
   Active Gauge Length (Grid Length)       The gauge length of a strain gauge is the active or strain-sensitive length of the grid. The end loops and solder tabs are considered insensitive to strain because of their relatively large cross-sectional area and low electrical resistance. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Number of Gauges in Gauge Pattern       The total number of strain gauges in the gauge pattern. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Operating Temperature       The operating temperature range is the range of ambient temperature where the use of the strain gauge is permitted without permanent changes of the measurement properties. 
   Search Logic:      User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
   Gage Factor       The strain sensitivity, k, of a strain gage is the proportionality factor between the relative change of the resistance.  The strain sensitivity is a figure without dimension and is generally called gage factor. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Nominal Resistance:      The resistance of a strain gage is defined as the electrical resistance measured between the two metal ribbons or contact areas intended for the connection of measurement cables.
   Your choices are...         
   120Omega: Ohms       Nominal resistance is 120Omega: Ohms
   350Omega: Ohms       Nominal resistance is 350Omega: Ohms
   540Omega: Ohms       Nominal resistance is 540Omega: Ohms
   600Omega: Ohms       Nominal resistance is 600Omega: Ohms
   700Omega: Ohms       Nominal resistance is 700Omega: Ohms
   1000Omega: Ohms       Nominal resistance is 1000Omega: Ohms
   Other       Other unlisted, specialized, or proprietary nominal resistance. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Strain-Sensitive Material (If Applicable)      The principal component that determines the operating characteristics of a strain gage is the strain-sensitive material used in the foil grid.
   Your choices are...         
   A-Alloy       Constantan, a nickel-copper alloy. 
   D-Alloy       Isoelastic nickel-chromium alloy. 
   K-Alloy       Nickel-chromium alloy, a modified Karma in self-temperature-compensated form. 
   P-Alloy       Annealed constantan. 
   Platinum Alloy       Platinum alloy such as Tungsten. 
   Other       Other unlisted, specialized, or proprietary strain-sensitive material. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Features
   Termination Options:       
   Your choices are...         
   Ribbon Leads       Ribbon leads are flat cables made with parallel round conductors in the same plane.  They are supplied for the connection of lead wires. 
   Lead Wires       Strain gauge is supplied pre-wired. 
   Solder Tabs       Portion of a strain gage pattern designed for the attachment of lead wires. 
   Other         
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Cryogenic Use       Strain gauge is designed to withstand the extreme low temperatures used in cryogenic applications. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Embeddable       The design of the strain gauge enables embedment and makes the gauge suitable for internal stress measurement.  Special strain sensors for embedding in concrete.  
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Encapsulated       Encapsulated strain gauges have a flexible coating bonded over the grid and backing that reduces risk of grid contamination. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Waterproof       Strain gauge is manufactured for environments that may include splashing / wetting of components. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Weldable       Weldable strain gauges and temperature sensors bonded to a metal carrier for spot welding to a test structure when adhesive cannot be used or minimum installation time is required. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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