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1. Sambungan pipa
Sambungan pipa adalah metode sambungan pneumatik yang umum untuk sensor tekanan. Anda harus mencocokkan pipa dengan skenario aplikasi sensor untuk memastikannya memenuhi kisaran suhu pengoperasian dan tekanan kerja yang diperlukan. Tergantung pada kisaran tekanan kerja dan suhu, Anda dapat memilih jenis pipa yang sesuai (tabung silikon atau pipa vinil).
Misalnya, pipa silikon biasanya paling mudah untuk disambungkan, namun tekanan kerjanya lebih rendah dibandingkan beberapa bahan lainnya. Semakin rendah kekerasan Shore pada pipa, semakin mudah untuk dipasang ke port tekanan sensor — namun semakin rendah kekerasan Shore, semakin rendah tekanan kerja yang dapat ditahan oleh pipa. Jika tekanan kerja 20 psi atau lebih rendah, pipa silikon atau vinil biasanya dipilih; jika tekanan melebihi 20 psi, Anda dapat mempertimbangkan untuk menggunakan pipa polietilen densitas rendah.
Recommended tubing types for basic board-mounted pressure sensors. In general, when the working pressure is ≤ 15 psi, fittings or clamps are normally not required. However, because application scenarios vary, you must judge whether clamps are needed in your specific case to ensure the tubing remains secure and leak-free. Factors to consider include vibration, sudden pressure changes, and the type of tubing used. A common fixing method is to use plastic cable ties — these are widely available at hardware stores, come in various sizes, are easy to install and can hold the tubing in place long-term.
Before fitting the tubing onto the port, you may choose to apply a small amount of epoxy resin to the pressure port, or seal the tubing end after it is in place. This kind of sealing both secures the tubing and acts as a sealant to ensure a complete seal between the pressure port and the tubing. Room-temperature-curing sealants are commonly used for this purpose. Take special care that epoxy does not block the port openings — the port must remain unobstructed.
To achieve a firmer connection between the tubing and the port, you can use a low-power hot-air gun to apply gentle heat to the tubing. Once it cools, the tubing will fit more tightly against the pressure port.
2. O-ring manifold design
O-rings can also be used for pneumatic connections to sensors. Most O-ring manufacturers recommend a compression of 20–25% to ensure ideal O-ring squeeze across the temperature range. Silicone or fluorosilicone O-rings are widely used because they deform less than many other O-ring materials when the temperature changes. When choosing the O-ring base polymer, the two most critical parameters are the system’s operating temperature and compatibility with the sealing medium.
For more demanding applications, a second O-ring seal can be used; the seal heights are 3.6 mm for the VN pressure port and 4.55 mm for the SN pressure port.
Kesimpulan
The pneumatic connection method used for a pressure sensor has a direct impact on system sealing performance, long-term stability and measurement reliability. Tubing connections are widely used in low to medium pressure applications because they are simple, low cost and flexible; however, selection must consider tubing material, Shore hardness, working pressure, temperature and vibration, and clamps or sealants should be applied where necessary to prevent leakage. O-ring manifold designs are better suited to applications requiring higher sealing reliability and environmental resilience; their success depends on controlling the compression ratio and selecting a base polymer compatible with the operating temperature and sealing medium. In summary, choosing the correct pneumatic connection scheme for the specific application is essential to fully realise a pressure sensor’s performance and ensure stable long-term operation.
Pengenalan di atas hanya sekilas tentang penerapan teknologi sensor tekanan. Kami akan terus mengeksplorasi berbagai jenis elemen sensor yang digunakan di berbagai produk, cara kerjanya, serta kelebihan dan kekurangannya. Jika Anda ingin mengetahui detail selengkapnya tentang apa yang dibahas di sini, Anda dapat melihat konten terkait nanti di panduan ini. Jika Anda terdesak waktu, Anda juga dapat mengklik di sini untuk mengunduh rincian panduan ini Data PDF Produk Sensor Tekanan Udara.
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