Validating metal detectors

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We're sorry if our change has caused you inconvenience.Because the current gas sensing technologies on the market – biomimetic, metal oxide semiconductor (MOS) and electrochemical – all have a limited life, it is imperative the gas sensing element be supervised to ensure continuous operation.The new requirements of the third edition of ANSI/UL 2075 address this issue by mandating critical life-safety supervision features that will prevent a failed detector from going undetected.1, 2009, the terminal screws must facilitate the required wiring supervision provisions of the UL standard.ANSI/UL 2075 requires the terminal screws to consist of binding screws with terminal plates having upturned lugs (see “CO Detector Wiring Requirements” diagram above).

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