SDX15D4-A

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Pressure sensors, transducers, and sensing elements of all kinds play a major role in the modern machinery and industrial process. The enabling technologies, such as the SDX15D4-A pressure transducer, provide functionality, accuracy, precision, and reliability for a vast range of applications. This article will discuss the SDX15D4-A pressure transducer application field and its working principle.

Application Overview

The SDX15D4-A pressure transducer is a single-stage, differential pressure transducer designed for use in both high and low pressure settings. It uses a thermally compensated silicon strain gage bridge circuit that provides reliable and stable performance even in extreme conditions. This transducer is suitable for applications from 10 inH2O to 100 psi and is able to measure both positive and negative pressure. This transducer is utilized in numerous applications, such as fuel and lubricant analysis, ventilation control, aircraft hydraulic system monitoring, and medical device calibration.

Working Principle

The SDX15D4-A pressure transducer works through the concept of differential pressure, whereby pressure is applied to the transducer body and a bridge circuit detects the resistance change. This causes a capacitive variation as measured by the transducer’s strain gauges, which is then converted to an electrical signal and sent to a controller for further processing or display. The strain gauges, typically constructed from silicon or ceramic, reduce the capacitive variation across the bridge circuit. Through precise calibration of the strain gauges, the resistance change can be accurately measured, allowing for accurate pressure readings.

The SDX15D4-A also utilizes temperature compensation to ensure accuracy under variable environmental conditions. As the temperature of the transducer body changes, the pressure signal is adjusted to compensate for the ambient temperature. This ensures the pressure sensor is providing accurate readings even in extreme temperature fluctuations.

Considerations Before Use

The SDX15D4-A is a reliable and accurate pressure transducer, however before use several considerations must be taken into account. Thetransducer has an External Reference Pressure (ERP) to ensure accurate calibration, and it must be properly placed on the transducer body. Additionally, additional components must be considered for successful application; these include filters, regulators, and controllers for isolating the transducer, power supplies, dampeners, wiring, and transducer-to-controller connection cables. Furthermore, the SDX15D4-A’s enclosure needs to have enough space for an air-to-air gap between it and the application body to ensure proper ventilation.

Conclusion

In conclusion, the SDX15D4-A is a pressure transducer capable of measuring both positive and negative pressures from 10 inH2O at up to 100 psi in a single stage. It is suitable for use in a variety of applications, from fuel and lubricant analysis to aircraft hydraulic systems monitoring. The SDX15D4-A utilizes reliable strain gauges and thermally compensated silicon to ensure accuracy even in extreme environmental conditions.

When using this transducer, it is important to ensure that the external reference pressure is correctly set and that all additional components, such as filters, regulators, and controllers, are taken into consideration. Additionally, proper ventilation and air-to-air gap between the transducer and application body is essential for reliable performance.

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