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Standard Gage Designation System

The following Strain Gage Designation System applies to all general-purpose Micro-Measurements gages.



Carrier Matrix (Backing)


E     Open-faced general-purpose gage with tough, flexible cast polyimide backing. Various options are available, including lead connection features and protective encapsulation.

CE     Flexible gages with a cast polyimide backing and encapsulation featuring large, rugged, copper-coated solder tabs. This construction provides optimum capability for direct leadwire attachment.

N2     The 'N2' matrix provides an open-faced gage on a thin, high-performance laminated polyimide film backing.

S2     Gage grid and solder tabs fully encapsulated in a thin, flexible, laminated polyimide film. Provided with large [0.030 in (0.75 mm)] solder pads for ease of leadwire attachment.

W     Provides a gage fully encapsulated in glass-fiber-reinforced epoxy-phenolic resin . High-endurance leadwires.

S     Full encapsulation identical to the W matrix, but with solder dot connections instead of leadwires.



Foil Alloy


A Alloy     Constantan alloy in self-temperature-compensated form.

P Alloy     Annealed constantan. Used for high-elongation or post-yield gages.

D Alloy     Isoelastic alloy. High gage factor and high fatigue life.

K Alloy     A nickel-chromium alloy (similar to Karma) used for high-performance self-temperature-compensated gages.



Self-Temperature Compensation


The S-T-C number is the approximate thermal expansion coefficient in ppm/deg F of the structural material on which the gage is to be used. The following S-T-C numbers are available:
A Alloy   00, 03, 05, 06, 09, 13, 15, 18
P Alloy   08
K Alloy   00, 03, 05, 06, 09, 13, 15
Gages with S-T-C's of 30, 40, or 50 are available as Special-Purpose Gages .

The D Alloy is not available in self-temperature-compensated form. 'DY' is used instead.



Active Gage Length


The active gage length in mils [0.001 in (0.0254 mm)].



Grid & Tab Geometry


Unique for each grid and tab geometry.



Resistance


Nominal resistance of the gage in ohms.



Standard Optional Features


Most of the following options apply to the EA- or ED-Series gages:

Option W     Integral printed circuit terminal, polyimide encapsulation.

Option E     Polyimide encapsulation, leaving a portion of solder tab exposed.

Option SE     Solder dots plus polyimide encapsulation.

Option L     Preattached, soft, formable copper leads.

Option LE     Leads plus polyimide encapsulation.

Option P     Preattached leadwire cables and encapsulation.

Option P2     Preattached leadwire cables for CEA-Series gages.