| Criteria | Pneumatic Signal | Hydraulic Signal | Electrical Signal |
|---|---|---|---|
| Medium | Compressed air | Oil or fluid | Electric current or voltage |
| Speed | Moderate | Slower compared to pneumatic | Very fast |
| Accuracy | Moderate | High | Very high |
| Power Transmission | Low | High | Moderate |
| Reliability | High | High | Moderate (depends on conditions) |
| Application | Used in tools and light systems | Heavy machinery | Electronics and precise controls |
| Cost | Low | High | Variable |
| Environmental Impact | Minimal | Risk of leaks and contamination | Depends on energy source |
| Standard Signal Range | 3 to 15 psi | 10 to 50 bar (varies by system) | 4 to 20 mA, 0 to 10 V |
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