- 品牌：BETA (荷蘭)
- 完整型號：C3-P502H-S2N-S4-G1-I
- 外殼類型代碼 (C3)：C3型 鋁合金外殼 (IP66 / NEMA 4X 防護等級)，適用于本安型 (Intrinsically Safe) 防爆環境
- 量程范圍代碼 (P502H)：高壓隔離活塞式壓力范圍
- 微動開關代碼 (S2N)：雙刀雙擲 (DPDT) 銀觸點微動開關
- 膜片/O型圈材質 (S4)：316L不銹鋼膜片配焊接式密封結構
- 工藝連接代碼 (G1)：1/2" NPT 內螺紋工藝接口
- 認證/選項代碼 (I)：ATEX / IECEx 本安防爆認證 (Ex ia)
- 額定防護等級：IP66
- 工作溫度范圍：-30℃ 至 +80℃ (視具體介質調整)
- 產品凈重：約 1.65 kg (含標準安裝支架)
- 包裝總重：約 2.10 kg
- 荷蘭BETA自控儀表在工業壓力與溫度監測領域久負盛名。C3-P502H-S2N-S4-G1-I是一款專為嚴苛工業現場設計的高性能、高可靠性防爆壓力開關。該開關的核心優勢在于其自對中的彈簧活塞傳感器結構。這種設計將工藝介質與內部微動開關完全隔離，在承載高靜壓以及抵抗劇烈壓力脈動方面表現極為卓越。其特有的彈簧負載活塞設計，賦予了設備出色的抗震動與抗沖擊性能，能夠有效避免由于管道振動或現場輕微顛簸導致的開關誤動作。
在外殼工藝方面，該型號采用C3級堅固的鋁合金鑄造外殼，表面涂覆有高抗腐蝕性的環氧樹脂涂層。外殼具備堅固的密封蓋、不可脫落的緊固螺釘以及一體式橡膠墊圈，防護等級達到IP66（符合NEMA 4X標準）。這使它能夠輕松抵御鹽霧、酸雨以及高濕度等惡劣戶外環境。內部接線端子排設計合理，帶有標準的接地端子，方便現場技術人員進行安全快捷的接線。
在電氣性能與材質配置上，本型號配置了S2N雙刀雙擲（DPDT）微動開關。這使它能夠同時輸出兩組獨立的開關信號，既能用于聯鎖報警，也能同時傳輸給DCS或PLC系統進行邏輯控制。觸點采用優質銀材質，具有極低的接觸電阻和出色的耐電弧磨損性能。針對腐蝕性或高壓介質，該機型選用了S4級別的316L不銹鋼膜片，采用全焊接式的密封結構，杜絕了常規O型圈在極端工況下可能發生的硬化、溶解或老化泄漏風險。工藝接口為通用的G1（1/2" NPT內螺紋），能夠完美匹配主流化工、石油管道。此型號通過了嚴格的本安防爆認證（后綴I，含ATEX與IECEx等多國認證標準），是易燃易爆氣體、蒸汽等危險區域的理想控壓選擇。
行業應用方面，該產品廣泛應用于石油天然氣開采、煉油化工、海上鉆井平臺、大型鍋爐蒸汽系統、液壓潤滑站以及電力行業的重型輪機控壓。在實際選型中，若需要單刀雙擲（SPDT）或不同的電氣容量，可參考推薦同系列其他規格。
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