With emitter and receiver sensors on either side of the U-shaped housing, the sensors emit a visible red beam that burns through any airborne contaminants, if needed. The fastest model offers 150-microsec. response time with 75-microsec. repeatability. Both models measure 2.88”Lx2.08”Wx0.75”D, with a 1.2”Wx2.08”D slot.
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