The optional ‘Extension Sensor’ ES1 is a useful addition it acts as an extension of the WD1 detection circuit and is completely waterproof and symmetric (dual-sided detection) with no active components. The main unit is designed to operate fixed-mounted to a surface (by a center screw), or free-standing, and has a built-in piezo and LED. ES1 plug connection and wire cut both supervised. ![]()
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