Minimum 30 years based on existing product experience to date. 3M has extensive experience with this type of product and has sold over 25 million electronic markers worldwide so far.

There has been no evidence to suggest this. Data life validation tests project data will be retained for over 200 years.

The chips are not affected by magnetic fields

The markers don’t use batteries – They are totally passive and don't "run out"

The products are legally compliant and are CE marked. The frequency is 66 KHz for the recommended General Purpose marker type.

For marker locating the locators have a signal power output of 0.5W.

Use of the recommended eight AA size, alkaline 1.5V batteries will provide typical battery life of 25 hours. Rechargeable equivalents may be used, however because their voltage is 1.2V each and their mAh ratings vary, we cannot predict what the typical battery life would be.

Maximum of 1.2m trench depth if using the recommended General Purpose marker ball type, other markers available from 3M for either shallower or deeper applications. Markers are ideally attached to a utility using cable ties, please see the 3M marker burial instructions for more details.

Water has no effect. Metal in close proximity can affect the marker read range. Please see our installation process for more details.