For our fact finding concerning this product please refer to the following:
The ONF3 uses current monitoring to detect the switching on of loads in a household circuit. Monitoring voltage is 200mV DC.
This works well with resistive loads or Edison lamps. But with introduction of more and more electronic control and start circuits, reliable load detection and automatic restart become more and more impossible. Those circuits simply do not drain current at a low voltage level of 200mV.
Increasing the sensing voltage to detect switched-on loads, would be a possible technical solution or work around of above situation. But the increased sensing voltage (let’s say 50V DC) would spoil the effect to keep the circuits volt- and-field free when not in use. But to guarantee field free power lines is the key feature of such a device!
Else we recognise more and more remote controlled or network connected devices, all of them operating with high frequency pulsed signals. Would it make sense in such an environment to have the powerlines volt-free only to reduce the impact of electromagnetic fields?
For this reason we decided to fade out production of this item. We do not plan for a new type with comparable functionality.