Diffused silicon pressure sensors are designed based on the piezoresistive effect, where strain resistors are doped and diffused along specific crystal orientations on a single-crystal silicon wafer to form a Wheatstone bridge. By leveraging the elastic mechanical properties of silicon and performing anisotropic micromachining, a sensor is created that integrates both force-sensitive and force-to-electric conversion functions. This technology ensures high sensitivity and stability in pressure measurement applications. Selection Guidelines 1. Selecting Sensors and Transmitters: Determine the type of pressure you're measuring—gauge, differential, absolute, or vacuum. If measuring liquid level, ensure there's free atmospheric pressure above the surface or a sealed container. For sealed systems, use differential pressure products for accurate readings. 2. Determine the Measurement Range: Always choose a range that allows the working pressure to be between 60% and 80% of the full scale. Consider overload limits and dynamic pressure effects, such as water hammer, which may require a higher-rated product for safety and accuracy. 3. Choosing Accuracy Level: Sensor accuracy is determined by multiple parameters. Higher accuracy comes at a cost, so it’s important to evaluate your needs. Some sensors offer customizable accuracy options, allowing you to meet precision requirements without overpaying. Be sure to account for temperature drift and other environmental factors when selecting a model. 4. Operating Temperature Range: Some transmitters include built-in temperature compensation, but the range is specified per product. For wide temperature environments, consider using software-based correction in secondary instruments. Operating beyond the compensated range may reduce accuracy, though the sensor can still function. Long-term exposure to extreme temperatures can shorten the product’s lifespan. 5. Selecting Differential Pressure Sensors: General-purpose differential sensors work well for positive differential pressures. While they can also measure negative differential pressures, the low-pressure side is often not calibrated. If symmetry is critical, special requests should be made during ordering. These sensors are ideal for ultra-low negative pressure measurements. 6. Frequency Response: Diffused silicon sensors have a high natural frequency. However, the structure of the pressure conduit and the rigidity of the sensor body can influence this. The pressure chamber design plays a significant role in determining the overall frequency response. 7. Compatibility with Measured Medium: The sensor housing and interface materials vary, affecting compatibility with different media. To avoid damage, always confirm the exact composition, concentration, and temperature of the medium before installation. This ensures optimal performance and longevity of the device. Installation and Usage Precautions When installing threaded components, use a wrench and avoid over-tightening. Do not disassemble or install other parts of the clamp, as this could damage the joints. Ensure no sharp objects are present near the pressure port to prevent damage to the sensitive diaphragm. Never drop, hit, or knock the device. The zero output of a diffused silicon sensor cannot be adjusted directly via a single-arm resistor method. Instead, use software zeroing, differential input trimming, or a T-type resistor network for accurate calibration. Following these steps ensures reliable and consistent performance over time. Optical Prism,Dispersion Prism,Si Right Angle Prism,Chandelier Prisms Danyang Horse Optical Co., Ltd , https://www.dyhorseoptical.com