More than 10 years ago Volt stick were asked to develop a de-sensitised non-contact voltage detector that could be used for Polarity Testing and would accurately identify the Positive incomer from the Neutral. A Volt Stick with a special de-sensitised antenna was produced that makes it more accurate and easier to use when Polarity Testing. our de-sensitised Volt sticks are used by some very large UK Electricity Network Operators including UKPN, SSE and ENW.