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The NK PRESSURE SPECIFIED SENSORY Device
U.S. Patent 5,027,828
Model PSSD001
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The NK PSSD device includes:
- Adjustable compliance to minimize the effect of movement of
evaluator's hand during testing
- Adjustable spacing of two sensing prongs
- Calibrations traceable to the National Institute if
Standards and Technology (NIST)
- Custom case available for portability
- Published normal values
- Software reports
- Customizable test locations
Optional custom holder |
- The NK PSSD device measures:
- 1 point static discrimination
- 2 point static discrimination
- 1 point moving discrimination
- 2 point moving discrimination
The NK PSSD Device:
- is based on contemporary electro-mechanical technology
- has the necessary range and resolution to measure the
magnitude of forces and pressures applicable to human sensory
perception
- utilizes computer technology for data acquisition and
analysis
Top View |
Bottom View |
TECHNICAL SPECIFICATIONS
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Force |
Spacing |
| Measurement Range |
1-100 G (0-0.22 Lb) |
2.7-25mm (0.1 - 1.0 In) |
| Accuracy |
+/-1% of Full Scale |
+/-1% of Full Scale |
| Resolution |
65 mg |
0.5 mm |
| Temperature Compensation Range |
5-50oC (41-122oF) |
5-50oC (41-122oF) |
| Maximum Excitation |
5 Volts |
5 Volts |
| Input Resistance (Ohms-Nominal) |
<1000 |
<500 |
| Output Resistance (Ohms-Nominal) |
<1000 |
<500 |
| Resistance to Ground |
>20,000 |
>20,000 |
| Bridge Output |
1.9 mV/V (100 G) |
15 mV/V (25 mm) |
| Non-Linearity |
<1% of Full Scale |
<1% of Full Scale |
| Hysteresis |
<1% of Full Scale |
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| Zero Shift |
<1% of Full Scale |
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| Calibration Intervals |
3 Years |
3 Years |
| Instrument Weight |
130 G (0.29 Lb) |
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| Height |
3.2 Cm (1.25 In) |
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| Width |
7.6 Cm (3.0 In) |
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| Length |
7.6 Cm (3.0 In) |
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| Pin Tips Diameter |
1.15 mm (Nominal) |
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| Projected area of pin in contact with skin |
1 mm2 |
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