常用型號(hào) J120-450 J120-451 J120-452 J120-453 J120-454 J120-550 J120-551 J120-552 J120-553 J120-554 J120-555 壓力開(kāi)關(guān) 系列描述 J120型:一個(gè)單刀雙擲輸出,環(huán)氧涂層外殼,外部可調(diào),有參考刻度;一個(gè)電氣接口 H121型:一個(gè)單刀雙擲輸出,環(huán)氧涂層外殼,外部可調(diào),有參考刻度;一個(gè)電氣接口 H122型:兩個(gè)單刀雙擲輸出,環(huán)氧涂層外殼,外部可調(diào),有參考刻度;一個(gè)電氣接口 H122P型:兩個(gè)單刀雙擲輸出,密封型開(kāi)關(guān),環(huán)氧涂層外殼,外部可調(diào),有參考刻度;一個(gè)電氣接口 防爆壓力開(kāi)關(guān)工作原理 防爆壓力開(kāi)關(guān)是通過(guò)堅(jiān)固的密封殼體將接線觸點(diǎn)密閉在堅(jiān)固空間中達(dá)到隔爆的效果。 防爆壓力開(kāi)關(guān)工作原理為純機(jī)械形變導(dǎo)致微動(dòng)開(kāi)關(guān)動(dòng)作。當(dāng)壓力增加時(shí),作用在不同的傳感壓力元器件(膜片、波紋管、活塞)產(chǎn)生形變,將向上移動(dòng),通過(guò)欄桿彈簧等機(jī)械結(jié)構(gòu),zui終啟動(dòng)zui上端的微動(dòng)開(kāi)關(guān),使電信號(hào)輸出,設(shè)定方式從功能原理上又分成連續(xù)位移型和力平衡型。防爆壓力開(kāi)關(guān)按原理可分為機(jī)械防爆壓力開(kāi)關(guān)和電子防爆壓力開(kāi)關(guān),機(jī)械式中又分為普通的和密封型。 J120-551壓力范圍 型號(hào) 可調(diào)整設(shè)定范圍 死區(qū) zui大壓力 Model Adjustable Set Point Range Deadband Over Range Low end of range on fall; Pressure* Pressure** High end of range on rise psi bar psi bar psi bar Teflon® diaphragm and Viton O-Ring 316 stainless steel with 1/4” NPT (female) 316 stainless steel pressure connection and cap 550 30 "Hg Vac to 3 "Hg Vac -1 to -0,1 0.1 to 0.4 "Hg 3,4 to 13,5 mbar 80 "wc 199,1 mbar 551 2 to 80 ”wc 5 to 199,1 mbar 1 to 4 "wc 2,5 to 10 mbar 80 "wc 199,1 mbar 552 30 "Hg Vac to 20 psi -1,0 to 1,4 0.2 to 0.5 "Hg 6,8 to 16,9 mbar 20 1,4 553 0.5 to 20 34,5 mbar to 1,4 bar 0.1 to 0.2 6,9 to 13,8 mbar 20 1,4 554 0.8 to 30 55,2 mbar to 2,1 bar 0.1 to 0.3 6,9 to 20,7 mbar 30 2,1
555 2 to 100 0,1 to 6,9 0.2 to 0.4 13,8 to 27,6 mbar 100 6,9