Thanks Tony, I do have an aker unit also. Point 1 works good. Point 2 does not trigger with a magnet at 20k but when I switch the DVOM to 200 Ohms instead, I get the tiny LED light to light up when I approach a magnet, the reading breefly changes and goes back to 0 even if the switch is still triggered by the magnet. When I tried with the aker and icomm, the led light goes up on the switch but the channel doesn't open. Would I need to add a load to the reed switch ?