The requirement was for a radio controlled switch activation assembly to trigger the release of x tonne logs from a height of Xm over a distance of xm. On release the log and sensor would fall to the ground and typical impact was measured at deceleration forces of 25G. Reliability and safety were paramount.
In this instance we produced RF receivers on thick layer microcircuit board which was encased in resin. These assemblies were used across the New Zealand forestry industry and proved to be both effective, safe and extremely reliable with not a single unit being returned notwithstanding what can only be described as the harshest of environments.