- SEMICONDUCTOR BAR GAGES
- Introduction
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Bar Shaped Semiconductor Strain Gages |
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| High Stability, high accuracy, low cost semiconductor strain gages for all applications. The gages, made from P-doped silicon, are the heart of the Micron Instruments pressure and force transducers. | |
Semiconductor strain gages are devices which vary in resistance as strain is applied to them. This property makes them very useful in measuring extremely small amounts of force with accuracy and precision. Creative uses for these gages have ranged from the measurement of internal pressures inside solid rocket engines to delicate medical apparatus used in microsurgery. Gages made from semiconductor materials have advantages over more conventional types of strain gages. These include homogeneity, increased “sensitivity”, and decreased size. Gages made by Micron Instruments range down to 0.027" (0.69 mm) in length. Micron semiconductor strain gages are made from Czochoralski pulled boron doped bulk silicon. They have no P/N junction. The silicon is etched to shape, eliminating the potential for molecular dislocation or cracks, thereby optimizing performance. All gages manufactured by Micron must pass through rigorous tests before they are approved for use by our customers. The behavior of each gage at different temperatures is measured and the gages are matched to each other based upon these measurements. Customers may purchase Gages in Singles or matched sets of 2, 4, or more gages. |
[SHOW | HIDE] X Y & Z Dimensions
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Part Number X Y |
Dimension Z |
Lead Type |
Thickness |
Resistance @ 78 deg F |
Gage Factor |
TCGF* |
TCR* |
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| SS-027-013-500P |
0.009" |
Ball Bond |
0.0004" |
540 ± 50 Ohms |
155 ± 10 |
-18 |
24 |
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| SS-037-022-500P | 0.009" |
Ball Bond |
0.0004" |
540 ± 50 Ohms |
150 ± 10 |
-13 |
17 |
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| SS-060-033-500P | 0.008" |
Welded |
0.0004" |
540 ± 50 Ohms |
140 ± 10 |
-13 |
15 |
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| SS-060-033-1000P | 0.008" |
Welded |
0.0004" |
1050 ± 75 Ohms |
155 ± 10 |
-18 |
24 |
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| SS-080-050-120P | 0.008" |
Welded |
0.0004" |
120 ± 20 Ohms |
120 ± 10 |
-9 |
5 |
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| SS-080-050-230P | 0.008" |
Welded |
0.0004" |
230 ± 30 Ohms |
120 ± 10 |
-9 |
5 |
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| SS-080-050-345P | 0.008" |
Welded |
0.0004" |
345 ± 40 Ohms |
140 ± 10 |
-13 |
16 |
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| SS-080-050-500P | 0.008" |
Welded |
0.0004" |
540 ± 50 Ohms |
140 ± 10 |
-13 |
16 |
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| SS-080-050-500P | 0.008" |
Ball Bond |
0.0004" |
540 ± 50 Ohms |
140 ± 10 |
-13 |
16 |
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| SS-080-050-1000P | 0.008" |
Welded |
0.0004" |
1050 ± 75 Ohms |
155 ± 10 |
-18 |
24 |
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| SS-090-060-500P | 0.008" |
Welded |
0.0004" |
540 ± 50 Ohms |
140 ± 10 |
-13 |
16 |
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| SS-090-060-1150P | 0.008" |
Welded |
0.0004" |
1125 ± 75 Ohms |
155 ± 10 |
-18 |
24 |
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| SS-150-125-15P | 0.009" |
Welded |
0.0010" |
15 ± 2 Ohms |
100 ± 10 |
-10 |
6 |
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| SS-150-125-25P | 0.009" |
Welded |
0.0008" |
25 ± 3 Ohms |
100 ± 10 |
-10 |
6 |
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| SS-250-225-120P | 0.009" |
Welded |
0.0004" |
120 ± 20 Ohms |
100 ± 10 |
-10 |
6 |
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| Standard Bridge Matching | ||||
| Temperature °F | 0° |
78° |
278° |
|
| Standard Matching | ±0.6% |
±0.4% |
±0.4% |
Percent of Base Resistance |
| Schematic | ||
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| Coming Soon... |
- What is Gage Factor
- What Is TCGF
- What is TCR
- Downloads (PDF)
GAGE FACTOR |
| The gage factor (G.F.) of strain gage is a dimensionless number defined by the formula |
| G.F. = (R - Rm)/RE |
| where |
| R = nominal unstrained resistance of the gage, |
| Rm = the measured resistance of the gage under some known strain, E, |
| and |
| E = the strain on the gage. |
Thermal Coefficient of Gage Factor (TCGF) |
| The Thermal Coefficient of Gage Factor (TCGF) is due to thermal effects in the silicon matrix of the strain gage inhibiting the flow of electrons. The formula for TCGF is |
| TCGF = (100 x (GF2 - GF1))/(GF1 x (T2 - T1)) |
| where |
| GF1 = Gage factor at ambient temperature T1; |
| GF2 = Gage factor at elevated temperature T2; |
| T1 = ambient temperature (78 deg F); |
| and |
| T2 = elevated temperature. |
| * per 100 degrees F |
Thermal Coefficient of Resistance (TCR) |
| The Thermal Coefficient of Resistance (TCR) is also due to thermal effects in the silicon matrix affecting the flow of electrons. The formula for TCR is given by |
| TCR = (100 x (R2 - R1))/(R1 x (T2 - T1)) |
| where |
| R1 = Resistance at ambient temperature T1; |
| GF2 = Resistance at elevated temperature T2; |
| T1 = ambient temperature (78 deg F); |
| and |
| T2 = elevated temperature. |
| * per 100 degrees F |
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| Micron Instruments located in Simi Valley, California, is a leading manufacturer and supplier of High-Quality Semiconductor Strain Gages, Pressure Transducers, Temperature Sensors and Measuring Systems. | Micron Meters offers a wide range of Products for Measuring and Recording Environmental and Physical Conditions. Telemetry Based Strain Gage Readers, Data Loggers, Panel Meters, Load and Pressure devices are just a few of our unique products. | ||
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| CompuDAS systems work with Ovens, Autoclaves, Presses and many more types of manufacturing equipment. With a full featured software control and monitoring package, we provide the control and data acquisition resources you need. |
| Contact Information | |
| Micron Instruments 4509 Runway Street Simi Valley, CA 93063 |
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Phone: |
805.522.4676 |
| 800.638.3770 | |
Fax: |
805.522.4982 |