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※ Features LED bargraph to indicate signal strength, sensing contrast, programming status and diagnostic warnings, when not in high-speed mode 
※ Available in glass and plastic fiber optic models 
※ Includes marginal gain indicator with alarm output 
※ Solves routine applications with economical standard models 
※ Features high-speed sensing response and higher sensing power in some models 
※ Excels in low-contrast applications with ac-coupled models 
※ Features easy push-button TEACH-mode setup on D12E Expert models

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