How do you create a more intuitive electrical tester?

First, Identify the most used testers on the market.

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Current offerings for GFCI testers used 3 colored lights in order to signal the state of the circuit. This meant reading a chart to understand what the lights meant, leaving room for error. These findings lead directly to concept generation.

Initial Concepts

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Initial concepts explored form, handling, and ease of use. Size and profile of concept 2 was preferred. Use of color and brand language were key to fitting the current product lineup.

Final Concept

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The final design features a 360 degree non contact lens with audible alarm. The GFCI testing end has a 5 LED system with labeling and lenses visible from both sides.

In use: GFCI Tester gives clear indication of the outlet status using a lens on each side of the tool and corresponding label. Non-contact tester gives audible alarm and red LED illuminates to indicate electrical current is present.