800FP-P4PN7R800FM-P4PN3R800FP-P4800FP-P4-BP800FP-P4MN5R800FP-P4MN7R800FP-P4MQ3R800FP-P4PD0C800FP-P4PD3C800FP-P4PD5C800FP-P4PN3R800FP-P4PN5R800FP-P4PN7R800FP-P4PQ3R800FP-P4PQ5R800FM-P4800FM-P4MD3C800FM-P4MN3R800FM-P4MN5R800FM-P4MN7R800FM-P4PD2C800FM-P4PN3R800FM-P4PN5R800FM-P4PN7R 它把發射端和接收端之間光的強弱變化轉化為電流的變化以達到探測的目的。由于光電開關輸出回路和輸入回路是電隔離的（即電絕緣），所以它可以在許多場合得到應用。采用集成電路技術和SMT表面安裝工藝而制造的新一代光電開關器件，具有延時、展寬、外同步、抗相互干擾、可靠性高、工作區域穩定和自診斷等智能化功能。這種新穎的光電開關是一種采用脈沖調制的主動式光電探測系統型電子開關，它所使用的冷光源有紅外光、紅色光、綠色光和藍色光等，可非接觸，無損傷地迅速和控制各種固體、液體、透明體、黑體、柔軟體和煙霧等物質的狀態和動作。具有體積小、功能多、壽命長、精度高、響應速度快、檢測距離遠以及抗光、電、磁干擾能力強的優點。光電開關已被用作物位檢測、液位控制、產品計數、寬度判別、速度檢測、定長剪切、孔洞識別、信號延時、自動門傳感、色標檢出、沖床和剪切機以及安全防護等諸多領域。此外，利用紅外線的隱蔽性，還可在銀行、倉庫、商店、辦公室以及其它需要的場合作為防盜警戒之用。
常用的紅外線光電開關，是利用物體對近紅外線光束的反射原理，由同步回路感應反射回來的光的強弱而檢測物體的存在與否來實現功能的，光電傳感器首先發出紅外線光束到達或透過物體或鏡面對紅外線光束進行反射，光電傳感器接收反射回來的光束，根據光束的強弱判斷物體的存在。紅外光電開關的種類也非常的多，一般來說有鏡反射式光電開關、漫反射式、槽式、對射式、光纖式等幾個主要種類。光電開關快易優自動化選型有收錄。
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