開(kai)關(guan)(guan)(guan)(guan)的(de)詞語解釋為(wei)開(kai)啟和(he)關(guan)(guan)(guan)(guan)閉。它還(huan)是(shi)(shi)指一個可(ke)以(yi)使電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)開(kai)路(lu)、使電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流中(zhong)斷或(huo)(huo)使其(qi)(qi)(qi)流到(dao)其(qi)(qi)(qi)他電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)元(yuan)件(jian)(jian)(jian)。最常見的(de)開(kai)關(guan)(guan)(guan)(guan)是(shi)(shi)讓(rang)人(ren)操作的(de)機電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)設備，其(qi)(qi)(qi)中(zhong)有(you)一個或(huo)(huo)數(shu)個電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)接(jie)點(dian)(dian)。接(jie)點(dian)(dian)的(de)“閉合”（closed）表示電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)接(jie)點(dian)(dian)導(dao)(dao)通(tong)(tong)，允許電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流流過；開(kai)關(guan)(guan)(guan)(guan)的(de)“開(kai)路(lu)”（open）表示電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)接(jie)點(dian)(dian)不導(dao)(dao)通(tong)(tong)形成(cheng)(cheng)(cheng)開(kai)路(lu)，不允許電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流流過。最簡單的(de)開(kai)關(guan)(guan)(guan)(guan)有(you)二(er)片(pian)名叫(jiao)“觸(chu)(chu)(chu)點(dian)(dian)”的(de)金屬(shu)(shu)，二(er)觸(chu)(chu)(chu)點(dian)(dian)接(jie)觸(chu)(chu)(chu)時使電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流形成(cheng)(cheng)(cheng)回路(lu)，二(er)觸(chu)(chu)(chu)點(dian)(dian)不接(jie)觸(chu)(chu)(chu)時電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流開(kai)路(lu)。選用(yong)(yong)(yong)接(jie)點(dian)(dian)金屬(shu)(shu)時需考(kao)慮(lv)其(qi)(qi)(qi)對抗(kang)腐蝕的(de)程度，因(yin)為(wei)大多數(shu)金屬(shu)(shu)氧(yang)(yang)化后會(hui)形成(cheng)(cheng)(cheng)絕緣的(de)氧(yang)(yang)化物，使接(jie)點(dian)(dian)無法正常工作。選用(yong)(yong)(yong)接(jie)點(dian)(dian)金屬(shu)(shu)也(ye)需考(kao)慮(lv)其(qi)(qi)(qi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)導(dao)(dao)率、硬度、機械強(qiang)度、成(cheng)(cheng)(cheng)本及是(shi)(shi)否有(you)毒等因(yin)素(su)。有(you)時會(hui)在(zai)接(jie)點(dian)(dian)上電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)鍍(du)抗(kang)腐蝕金屬(shu)(shu)。一般(ban)會(hui)鍍(du)在(zai)接(jie)點(dian)(dian)的(de)接(jie)觸(chu)(chu)(chu)面，以(yi)避免因(yin)氧(yang)(yang)化物而(er)影響(xiang)其(qi)(qi)(qi)性能(neng)。有(you)時接(jie)觸(chu)(chu)(chu)面也(ye)會(hui)使用(yong)(yong)(yong)非金屬(shu)(shu)的(de)導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)材料(liao)，如導(dao)(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)塑膠。開(kai)關(guan)(guan)(guan)(guan)中(zhong)除(chu)了接(jie)點(dian)(dian)之外(wai)，也(ye)會(hui)有(you)可(ke)動件(jian)(jian)(jian)使接(jie)點(dian)(dian)導(dao)(dao)通(tong)(tong)或(huo)(huo)不導(dao)(dao)通(tong)(tong)，開(kai)關(guan)(guan)(guan)(guan)可(ke)依可(ke)動件(jian)(jian)(jian)的(de)不同為(wei)分(fen)為(wei)杠桿(gan)開(kai)關(guan)(guan)(guan)(guan)（Toggle switch）、按鍵開(kai)關(guan)(guan)(guan)(guan)、船(chuan)型開(kai)關(guan)(guan)(guan)(guan)（Rocker switch）等，而(er)可(ke)動件(jian)(jian)(jian)也(ye)可(ke)以(yi)是(shi)(shi)其(qi)(qi)(qi)他型式(shi)的(de)機械連桿(gan)。延(yan)時開(kai)關(guan)(guan)(guan)(guan)是(shi)(shi)使用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)子(zi)元(yuan)件(jian)(jian)(jian)繼電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器安裝于開(kai)關(guan)(guan)(guan)(guan)之中(zhong)，延(yan)時開(kai)關(guan)(guan)(guan)(guan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)一種(zhong)開(kai)關(guan)(guan)(guan)(guan)。延(yan)時開(kai)關(guan)(guan)(guan)(guan)又分(fen)為(wei)聲(sheng)控延(yan)時開(kai)關(guan)(guan)(guan)(guan)、光控延(yan)時開(kai)關(guan)(guan)(guan)(guan)、觸(chu)(chu)(chu)摸式(shi)延(yan)時開(kai)關(guan)(guan)(guan)(guan)等。

互感器又稱為儀用變壓器，是電流互感器和電壓互感器的統稱。能將高電壓變成低電壓、大電流變成小電流，用于量測或保護系統。其功能主要是將高電壓或大電流按比例變換成標準低電壓（100V）或標準小電流（5A或1A，均指額定值），以便實現測量儀表、保護設備及自動控制設備的標準化、小型化。同時互感器還可用來隔開高電壓系統，以保證人身和設備的安全。
在供電用電的線路中，電流相差從幾安到幾萬安，電壓相差從幾伏到幾百萬伏。線路中電流電壓都比較高，如直接測量是非常危險的。為便于二次儀表測量需要轉換為比較統一的電流電壓，使用互感器起到變流變壓和電氣隔離的作用。
 顯示儀表(biao)大部分是(shi)指(zhi)針式(shi)的(de)(de)電(dian)(dian)(dian)(dian)流(liu)電(dian)(dian)(dian)(dian)壓表(biao)，所以電(dian)(dian)(dian)(dian)流(liu)互(hu)感器(qi)的(de)(de)二(er)(er)次電(dian)(dian)(dian)(dian)流(liu)大多數(shu)(shu)是(shi)安培級的(de)(de)（如5等）。隨(sui)著時代(dai)發展，電(dian)(dian)(dian)(dian)量測量大多已經達到(dao)數(shu)(shu)字化，而計算機的(de)(de)采(cai)(cai)樣(yang)的(de)(de)信號一(yi)般(ban)為毫安級（0-5V、4-20mA等）。微型電(dian)(dian)(dian)(dian)流(liu)互(hu)感器(qi)二(er)(er)次電(dian)(dian)(dian)(dian)流(liu)為毫安級，主要起大互(hu)感器(qi)與采(cai)(cai)樣(yang)之(zhi)間(jian)的(de)(de)橋梁(liang)作用(yong)。微型電(dian)(dian)(dian)(dian)流(liu)互(hu)感器(qi)稱之(zhi)為“儀用(yong)電(dian)(dian)(dian)(dian)流(liu)互(hu)感器(qi)”。（“儀用(yong)電(dian)(dian)(dian)(dian)流(liu)互(hu)感器(qi)”有一(yi)層含義是(shi)在實驗(yan)室使用(yong)的(de)(de)多電(dian)(dian)(dian)(dian)流(liu)比(bi)精(jing)密電(dian)(dian)(dian)(dian)流(liu)互(hu)感器(qi)，一(yi)般(ban)用(yong)于擴大儀表(biao)量程。）

接近開關是一種無需與運動部件進行機械直接接觸而可以操作的位置開關，當物體接近開關的感應面到動作距離時，不需要機械接觸及施加任何壓力即可使開關動作，從而驅動直流電器或給計算機（plc)裝置提供控制指令。接近開關是種開關型傳感器（即無觸點開關），它既有行程開關、微動開關的特性，同時具有傳感性能，且動作可靠，性能穩定，頻率響應快，應用壽命長，抗干擾能力強等、并具有防水、防震、耐腐蝕等特點。產品有電感式、電容式、霍爾式、交、直流型。
BEDIA    傳感器    0019 a/n: 420467 1089065953
BEDIA    液位開關    CLS50 500181
BEDIA    備件    600002 1089065903
BEDIA    傳感器    420304
BEDIA    備件    NR:500083
BEDIA    滑油低位傳感器    0050K009508
BEDIA    傳感器    600173
BEDIA    水位感應頭    50 210 212 11
BEDIA    備件    NR160-U 2W02 AA000-2ADC9-36V 419161 WST14571 BEDIA
BEDIA    電容式液位開關    CLS-40   322558
BEDIA    液位開關    419081 TLS100-WA25-CH0-A2M11/39
BEDIA    傳感器    TYPE:PLS-40 P/N:420431
BEDIA    傳感器    CLS40 421640
BEDIA    備件    TLS100-WA25-CL0-A2M  409085
BEDIA    備件    420735
BEDIA    液位傳感器    CLS45 350210
BEDIA    4路插頭    DIN72585 42070
BEDIA    水位傳感器    PLCA-50 部件號：5021021211
BEDIA    液位開關    0050K009505 LS103A LS103B LS108A LS108B
BEDIA    液位計    cls-50 500274
BEDIA    傳感器    CLS-40 322556
BEDIA    備件    CLS-50  500083
BEDIA    液位傳感器    CLS40 320487
BEDIA    壓力傳感器    15300116
BEDIA    液位傳感器    421577 M/N DC9-36V ETA 9591
BEDIA    備件    type CLS-40  PN:320404
BEDIA    液位開關    322558
BEDIA    液位傳感器    CLS-40 350232
BEDIA    電器件    ITS-60 825mm
BEDIA    傳感器    600002  034161
BEDIA    開關    PLS-40/3
BEDIA    備件    PLS-40 421566 dc-9-36v
BEDIA    備件    CLS-20    350739
BEDIA    Cable and cable connector    Do + Ka type 25 - 2 m
BEDIA    傳感器    CLS-40 320419
BEDIA    備件    PLS-40 421603 DC9-36V
BEDIA    液位開關    PLS-40 421575
BEDIA    機油液位傳感器    424633  GHW 18569  60
BEDIA    TubeLevelSensor    419082 TLS100-WA25-CH0-B 11/10
BEDIA    傳感器    PLCA50 5031021121
BEDIA    420312    420312
BEDIA    傳感器    TLS100-WA25-CLO-A2M 含2M電纜
BEDIA    備件    NR150-U2FBH0002A
BEDIA    油位計    CLS-50 500056
BEDIA    水位傳感器    PLCA-20 550527
BEDIA    液位開關    TLS100-WA25CH0-B
BEDIA    傳感器    ITS60-032-001V5
BEDIA    液位計    320405
BEDIA    油位傳感器    ITS60 TANK SENSOR L=790MM 600416
BEDIA    傳感器    CLS-40 321607
BEDIA    編碼器    RCMA473L6-33
BEDIA    傳感器    500274
BEDIA    SENSOR    NR:350138
BEDIA    傳感器    321611
BEDIA    傳感器    216129018
BEDIA    備件    500058
BEDIA    水位傳感器    PLS-40 320408 negative switching(LSS)
BEDIA    備件    X00031103、PLCA-50、5022021211.DC12/24v
BEDIA    電容式液位開關    CLS40 322558
BEDIA    流量開關    420341
BEDIA    備件    CLS-40  321564
BEDIA    壓力傳感器    15300118
BEDIA    備件    421640
BEDIA    14針插座    DIN72585 420701
BEDIA    油(you)位計    Nr:420715

BEDIA 液位開關PLS-40 421575翊霈代理供應

BEDIA 液位開關PLS-40 421575翊霈代理供應