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TPC Total Pressure Cell
The rugged stainless steel construction of the TPC makes it ideal to measure stress and pressure in harsh environments.
DESCRIPTION
The TPC cells consist of a sealed distribution pad, composed of two plates welded together around the periphery and filled with de-aired oil. The pad is connected via a length of steel tube to a pressure transducer. Variation in oil pressure resulting from load changes acting on the pad are sensed by the transducer.
The TPC is fitted with a circular or rectangular pad, the latter being designed for measurement or tangential and radial stresses in shortcrete tunnel linings. The stiffness of the TPC is high, enabling its embedment in soil or in concrete. A groove on both sides of the pad increases its flexibility while reducing sensitivity to stress in directions other than normal to the pad face. The concrete stress cell may be fitted with a repressurization tube to restore contact between the pad and the concrete after curing of the latter.
The TPC is fitted with eyelets, to simplify installation, and with a built-in thermistor allowing temperature reading.
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SPECIFICATIONS
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Range of vibrating wire transducer |
200, 350, 500, 750, 1000, 1500, 2000, 3000, 5000, 7000, 10 000, 20 000, 35 000 kPa |
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Overload |
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Construction |
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Material |
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Dimensions of distribution pad |
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Thickness |
6.3 mm |
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Circular cell diameter1 |
230 mm |
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Rectangular cell1 |
100 x 200 mm, 150 x 250 mm, 200 x 300 mm |
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PRESSURE TRANSDUCER |
VIBRATING WIRE |
PNEUMATIC |
ELECTRICAL |
FIBER OPTIC |
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Pressure range |
0-35 000 kP |
0-3500 kPa |
0-20 000 kPa |
0-20 000 kPa |
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Accuracy2 |
±0.5% F.S. |
±0.25% F.S. |
±0.25% F.S. |
±0.25% F.S. |
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Resolution |
0.025% F.S. (min) |
Depends on Pressure gauge |
0.01% F.S. |
0.01% F.S. |
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Thermistor 3kΩ3 (t° range: -20 to 80°C) |
Included |
— |
Optional |
— |
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Electrical surge protection |
Included |
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— |
— |
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Readout unit |
MB-3TL |
PR-20D |
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FOR-1, UMI |
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Data acquisition system |
SENSLOG |
SENSLOG |
SENSLOG |
FODL |
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Cable |
IRC-41A, IRC-390, CFO-9RF, CFO-3STD |
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1 Other dimensions available upon request.
2 Calibrated accuracy of the pressure transducer. (+/-0.1%FS with polynomial regression for vibrating wire)
3 See model TH-T.
ORDERING INFO
Please specify:
- Model and pressure range
- Type of pressure transducer
- Length of electrical cable or tubing
- Length of repressurization tube (1.2 m standard)
Ordering information:
- Readout instruments