backed

gauges

Easy to install

Mounted on a flexible insulated circuit with versatile solder pads makes this device easy to install on any surface. The gauge and gold wires are over-coated to seal out moisture and to provide additional protection of the gauge during the application process.

Customizable

We can put any gauge on our list on our backings. We can adapt the membrane size to your requirements.

Performance/Foil Gauge Substitute

The sensitivity is 50 to 75 times greater than a foil gauge. We can provide backed gauges with the same resistances as common foil gauge solutions (120 Ω or 350 Ω). A load producing a change of 3 mV on a conventional foil gauge will generate at least 150 mV on a backed half bridge.

Range

Up to 9000 µm/m (ppm), linear until very high strain.

High electrical resistance / IoT

We can produce backed gauges to fit your IoT monitored part application using high resistivity materials for the gauges. Devices with 10 – 50 kΩ are possible and will consume very little energy.

Flexible

Flexible enough to bend around a 12 mm (0.5 inch) diameter rod. Contact us if you require a smaller radius.

Linearity & Stability

On load cells and foil bridges our gauges can be used as a linearity corrector. A non-linearity of 0.125 % FS can be corrected to less than 0.05 % of full scale. Long-term stability is not compromised.

Suggested Uses

Prototyping for proof of concept. Transient or high frequency measurements. Structural testing at areas where a high resolution is required (e.g. fatigue monitoring).

BACKED GAUGES PRODUCT CODING

 

Semiconductor Strain Gauge (SS) – Total Length (X) – Active Length (Y) – Nominal Resistance – Shape (blank if bar) – Backed (B)

Example: SS-080-050-500 P– U – B

Semiconductor Strain Gauge; Total Length 0.08 inch; Active Length 0.05 inch; Nominal Resistance at 25° C 500 P – Shape U – Backed

BAR SHAPED

SS-027-013-500 PB
SIZE

Total Length mm (inch): 0.685 (0.027)

Active Length mm (inch): 0.330 (0.013)

Width mm (inch): 0.229 (0.009)

Lead attachment: Ball Bond

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 540±50

Gauge Factor: 155±10

TCGF: -18%

TCR: 24%

SS-060-033-1000 PB
SIZE

Total Length mm (inch): 1.524 (0.06)

Active Length mm (inch): 0.838 (0.033)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 1050±75

Gauge Factor: 155±10

TCGF: -18%

TCR: 24%

SS-080-050-345 PB
SIZE

Total Length mm (inch): 2.032 (0.08)

Active Length mm (inch): 1.27 (0.05)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 345±40

Gauge Factor: 140±10

TCGF: -13%

TCR: 16%

SS-090-060-500 PB
SIZE

Total Length mm (inch): 2.286 (0.09)

Active Length mm (inch): 1.524 (0.06)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 540±50

Gauge Factor: 140±10

TCGF: -13%

TCR: 16%

SS-150-124-25 PB
SIZE

Total Length mm (inch): 3.81 (0.15)

Active Length mm (inch): 3.149 (0.124)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.023 (0.0009)

ELECTRICAL

Resistance, Ω @ 25°C: 25±3

Gauge Factor: 100±10

TCGF: -10%

TCR: 6%

SS-250-225-120 PB
SIZE

Total Length mm (inch): 6.35 (0.25)

Active Length mm (inch): 5.715 (0.225)

Width mm (inch): 0.229 (0.009)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 120±20

Gauge Factor: 100±10

TCGF: -10%

TCR: 6%

SS-037-022-500 PB
SIZE

Total Length mm (inch): 0.939 (0,37)

Active Length mm (inch): 0.559 (0.022)

Width mm (inch): 0.229  (0.009)

Lead attachment: Ball Bond

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 540±50

Gauge Factor: 150±10

TCGF: -13%

TCR: 17%

SS-080-050-120 PB
SIZE

Total Length mm (inch): 2.032 (0.08)

Active Length mm (inch): 1.27 (0.05)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 120±20

Gauge Factor: 120±10

TCGF: -9%

TCR: 5%

SS-080-050-500 PB
SIZE

Total Length mm (inch): 2.032 (0.08)

Active Length mm (inch): 1.27 (0.05)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 540±50

Gauge Factor: 140±10

TCGF: -13%

TCR: 16%

SS-090-060-1150 PB
SIZE

Total Length mm (inch): 2.286 (0.09)

Active Length mm (inch): 1.524 (0.06)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 1125±75

Gauge Factor: 155±10

TCGF: -18%

TCR: 24%

SS-150-124-30 PB
SIZE

Total Length mm (inch): 3.81 (0.15)

Active Length mm (inch): 3.149 (0.124)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.020 (0.0008)

ELECTRICAL

Resistance, Ω @ 25°C: 30±3

Gauge Factor: 100±10

TCGF: -10%

TCR: 6%

SS-060-033-500 PB
SIZE

Total Length mm (inch): 1.524 (0.06)

Active Length mm (inch): 0.838 (0.033)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 540±50

Gauge Factor: 140±10

TCGF: -13%

TCR: 15%

SS-080-050-230 PB
SIZE

Total Length mm (inch): 2.032 (0.08)

Active Length mm (inch): 1.27 (0.05)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 230±30

Gauge Factor: 120±10

TCGF: -9%

TCR: 5%

SS-080-050-1000 PB
SIZE

Total Length mm (inch): 2.032 (0.08)

Active Length mm (inch): 1.27 (0.05)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 1050±75

Gauge Factor: 155±10

TCGF: -18%

TCR: 24%

SS-150-124-15 PB
SIZE

Total Length mm (inch): 3.81 (0.15)

Active Length mm (inch): 3.149 (0.124)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.025 (0.001)

ELECTRICAL

Resistance, Ω @ 25°C: 15±2

Gauge Factor: 100±10

TCGF: -10%

TCR: 6%

SS-150-124-40 PB
SIZE

Total Length mm (inch): 3.81 (0.15)

Active Length mm (inch): 3.149 (0.124)

Width mm (inch): 0.203 (0.008)

Lead attachment: Welded

Thickness mm (inch): 0.018 (0.0007)

ELECTRICAL

Resistance, Ω @ 25°C: 40±4

Gauge Factor: 100±10

TCGF: -10%

TCR: 6%

U SHAPED

SS-037-022-500 PUB
SIZE

Total Length mm (inch): 0.939 (0.037)

Active Length mm (inch): 0.559 (0.022)

Width mm (inch): 0.406 (0.016)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 540±50

Gauge Factor: 150±10

TCGF: -13%

TCR: 17%

SS-060-033-300 PUB
SIZE

Total Length mm (inch): 1.524 (0.06)

Active Length mm (inch): 0.838 (0.033)

Width mm (inch): 0.406 (0.016)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 325±40

Gauge Factor: 100±10

TCGF: -10%

TCR: 6%

SS-080-050-10000 PUB
SIZE

Total Length mm (inch): 2.032 (0.08)

Active Length mm (inch): 1.27 (0.05)

Width mm (inch): 0.33 (0.013)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 10000±1000

Gauge Factor: 175±10

TCGF: -23%

TCR: 42%

SS-047-025-500 PUB
SIZE

Total Length mm (inch): 1.194 (0.047)

Active Length mm (inch): 0.635 (0.025)

Width mm (inch): 0.406 (0.016)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 540±50

Gauge Factor: 140±10

TCGF: -13%

TCR: 16%

SS-060-033-500 PUB
SIZE

Total Length mm (inch): 1.524 (0.06)

Active Length mm (inch): 0.838 (0.033)

Width mm (inch): 0.406 (0.016)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 540±50

Gauge Factor: 140±10

TCGF: -12%

TCR: 14%

SS-095-060-350 PUB
SIZE

Total Length mm (inch): 2.413 (0.095)

Active Length mm (inch): 1.524 (0.06)

Width mm (inch): 0.406 (0.016)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 350±50

Gauge Factor: 120±10

TCGF: -9%

TCR: 5%

SS-047-025-1000 PUB
SIZE

Total Length mm (inch): 1.194 (0.047)

Active Length mm (inch): 0.635 (0.025)

Width mm (inch): 0.406 (0.016)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 1000±100

Gauge Factor: 160±10

TCGF: -20%

TCR: 28%

SS-060-033-2000 PUB
SIZE

Total Length mm (inch): 1.524 (0.06)

Active Length mm (inch): 0.838 (0.033)

Width mm (inch): 0.406 (0.016)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 2000±100

Gauge Factor: 155±10

TCGF: -18%

TCR: 24%

M SHAPED

SS-060-040-2500 PMB
SIZE

Total Length mm (inch): 1.524 (0.06)

Active Length mm (inch): 1.016 (0.04)

Width mm (inch): 0.813 (0.032)

Lead attachment: Welded

Thickness mm (inch): 0.010 (0.0004)

ELECTRICAL

Resistance, Ω @ 25°C: 2500±150

Gauge Factor: 140±10

TCGF: -13%

TCR: 17%

BACKING MEMBRANE

 

Backing material FR-4
Thickness 0.127 mm / 0.005 inch
Temperature rating
> 250°C
Electrical Trace Material
1 Oz Copper/Tin (top side only)

 

THE MEMBRANE SIZE CAN BE CUSTOMISED OR REDUCED TO LESS THAN 2 mm

STANDARD GAUGE SPECIFICATION

 

Materials Doped Silicon, single crystal
Operating strain +/- 3000 µm/m (standard); +/- 9000 µm/m (special)
Linearity better than +/- 0.25% to 600 µm/m; better than 1.5% to 1500 µm/m
Operating temperature 260°C (standard)

 

IF YOU USE MORE THAN ONE GAUGE IN COMBINATION, MINIMIZE THERMAL IMBALANCE AND DRIFT BY SELECTING SETS OF THERMALLY MATCHED GAUGES

STANDARD MATCHING

 

Temperature % of base resistance
-18°C +/- 0.6%
25°C +/- 0.4%
135°C +/- 0.4%

MIL SPEC MATCHING TO TIGHTER TOLERANCE AND ADDITIONAL TEMPERATURE POINTS AVAILABLE

S1 - Single gauge

Resistance Measured at -18°C, 25°C, 135°C

S2 - Matched set of 2 gauges

Both resistance thermally matched (-18°C, +135°C)

S4 - Matched set of 4 gauges

All resistance thermally matched (-18°C, +135°C)

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