Fitting Devices


Fitting pendants for children or adults that are at high risk of going missing and are either likely to remove the pendant or maybe chew the pendant until it is damaged require extra attention. The goal is to shorten the pendant so it can not be removed / chewed while ensuring the steel aerial on the inside of one side of the cord is not cut short.


  1. Some children may be able to chew without damaging the device, however if the family/carer has a CC308 meter they need to check the device weekly to ensure it is not damaged and functioning normally.
  2. The cords have a very high breaking strain so when fitting the pendants so they can not be removed, you and the family/carer need to ensure it is not going to be a hanging risk.

Different groups have developed their own methods to solve this situation. We have recorded Ray Harkness of Wellington WanderSearch demonstrating the method he uses.

Ray Harkness – Wellington Wandersearch demonstrates fitting a pendant

There are written instructions online on how to make the jewellers sliding knot see the following link for one example:

Ray uses superglue to seal the knots in place, other groups use medical tape to stop the knots sliding.

A method used by Wairarapa SAR includes taping the cords together at the end nearest the pendant to shorten the loop around a child’s neck. They also use a soft material tube that line the cords – image to come.

Ian Trethowen will also on request put a plastic heat shrink-wrap over devices to discourage the device users from damaging them.

wandersearch pendant covered by black heatshrink
Wandatrak pendant in heat shrink-wrap

Wrist devices

Wrist devices are a good option in situations where pendants are not possible, for example the person at risk will not wear a pendant or there could be a hanging risk if they did use a pendant. The disadvantage with wrist (and key-ring) devices are they can not be detected from as far away as the pendants. This is because the aerial is much shorter and internal – it is part of the circuit board inside the device.

To help keep the wrist device on the person, some groups use cable ties to fix the parts together. As with pendants, Ian Trethowen will on request heat shrink-wrap wrist devices to give an additional layer of protection.

WanderSearch wrist devices covered by black heat shrink-wrap
Wandatrak wrist device in heat shrink-wrap