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Linear Variable Differential Transformer (LVDT)
Linear Variable Differential Transformer (LVDT)
The LVDT is used to measure crosshead extension. It must satisfy:
- Travel distance: 4 mm
- Accuracy: < 40 µm
- Sample rate: > 2.5 kHz
Ultimately, the induSENSOR DTA-5D-SA was selected. It provides:
- Travel distance: 5 mm
- Accuracy: 30 µm
- Sample rate: 5 kHz
This sensor meets or exceeds each specification. It should be noted that the travel distance leaves little room for adjustment, As such, a sensor with greater travel distance (-10D, -15D, or -25D) may be selected, or a new method of fixing the sensor to the crosshead may be developed.
Load Cell
Load Cell
The load cell is used to measure applied force. It must satisfy:
- Capacity: 500 N
- Accuracy: < 1% applied load
Ultimately, the HTC Sensor TAS501M was selected. It provides:
- Capacity: 500 N
- Accuracy: .1% applied load
This sensor meets or exceeds each specification.
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