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Choosing the right pressure sensor for hydraulic systems requires understanding its sensitivity and measurement range. These factors influence the accuracy and effectiveness of pressure monitoring in various applications.
Understanding Sensitivity
Sensitivity indicates how much the sensor’s output changes in response to a change in pressure. It is typically expressed as a voltage or current change per unit of pressure, such as mV/psi or mA/bar. Higher sensitivity allows for detecting smaller pressure variations, which is essential in precise control systems.
Calculating Sensitivity
To determine the sensor’s sensitivity, divide the change in output signal by the corresponding change in pressure. For example, if a sensor’s output varies by 50 mV when pressure changes by 100 psi, its sensitivity is 0.5 mV/psi.
Determining Measurement Range
The measurement range defines the minimum and maximum pressure the sensor can accurately measure. Selecting an appropriate range ensures the sensor operates within its optimal performance zone, avoiding saturation or insufficient sensitivity.
Calculating Range
To select a suitable range, consider the maximum pressure expected in the hydraulic system, then add a safety margin. For example, if the maximum pressure is 3000 psi, choosing a sensor with a 0-4000 psi range provides adequate headroom and prevents sensor overload.
- Understand system pressure requirements
- Determine desired sensitivity for accuracy
- Select a range with safety margin
- Ensure compatibility with sensor specifications