PD-9A Polarity Checker Phase Detector Self-Test Auto-Off Audio Speaker Testing $45.00
Audio Polarity Checker Phase Detector Self-Test Auto-Off PD-9A Speaker Tester $43.00
IndusTec DC 20A Motor Polarity Reversing - Toggle Switch Maintained DPDT 3 Pos $14.99
Allen Bradley 937ZH-DPBN-2 Intrinsic Safety Zener Barrier, Positive Polarity DC $139.99
Hamilton Polarization Module G, -670 mV - P/N 237350 $49.99
Honeywell Quartz Polarity Sensitive Hour Meter 85098 $79.99
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