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Micro-Measurements
Special Purpose Strain Gages

500JD

Description   Bifilar spiral gage for use on diaphragms. Often used when a half-bridge can be formed with one gage on each side of diaphragm.


See Catalog 500 for detailed pattern.


Dimensions in    mm
Diameters   
    Pattern 0.500    12.70
    Minimum Diaphragm (2)   0.510*    12.95*
Matrix Size (Square) 0.70    17.8


Gage Designation (3)   Resistance (4)  
EA-XX-500JD-120     120 ±0.15%
WA-XX-500JD-120     120 ±0.5%
WK-XX-500JD-350     350 ±0.3%
SA-XX-500JD-120     120 ±0.3%
SK-XX-500JD-350     350 ±0.3%


(1) Option SP70 circular trim is available in EA Series only.
(2) A minimum 0.005 in (0.13 mm) radius is recommended on a machined diaphragm section.
(3) Insert desired STC number in space marked XX.
(4) In ohms.
* Normally used on 1-in (25.4-mm) diameter or larger diaphragms. Circular trim, Option SP70, not available.