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Maplin 3-15V AC and DC Polarity Checker

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Quoting product code: RS87U


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About this product


  • Compact and easy to use
  • Checks 3V to 15V (AC and DC)
  • Suitable for 2.1mm and 1.3mm DC power plugs and 3.5mm mono jack plug

Product overview

• Compact and easy to use• Checks 3V to 15V (AC and DC)• Suitable for 2.1mm and 1.3mm DC power plugs and 3.5mm mono jack plug• Identifies if centre pin positive or negative or AC• Can help prevent potential damage to expensive equipment

Rated 5 out of 5 by from The polarity checker works extremely well and accepts a wider range of connector sizes than the description suggests.
Date published: 2014-11-11
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Is this product suitable for checking polarity of incoming mains supply on a caravan site hook-up?
Asked by: Doug
No, this is for checking polarity of DC power supplies only.
Answered by: PW
Date published: 2015-07-17

Could you just confirm which of the two leds indicates which polarity of the centre pin. This is not really explicitly stated on the packaging or the tester, just indicated by the symbols on the tester.
Asked by: Paul Wheelerq
When the LED illuminates the LED has a + or a - next to it, this is the centre pin.
Answered by: JK
Date published: 2015-07-17
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