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In the Forum: Audio For Dummies ™
In the Thread: Always check power-line polarity.
Post Subject: Polarity checker, for conveniencePosted by tuga on: 11/25/2009
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For those seeking convenience or the plain lazy there's an interesting and very affordable gadget from Van den Hul:
POLARITY CHECKER
- Works without a battery, thus is always ready for use !
- Its liquid crystal display safely senses and indicates the voltage relative to your body (=ground), that is present at any object touched with its screwdriver blade.
- It measures 12V to 230V, AC and DC in 12, 36, 55, 110 and 220V indication steps and also can indicate the presence of electric stray fields.
- Very sensitive and safe: Its leakage current is less than 3µA.
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