when an induction welding machine is appyling power to the heating coil
thank you PaulS,I thought of that too, but those sensors are quite expensive and they want 25 of those devices, so if i could cut the cost it would be good..., nice suggestion by the wayThank you
Hello everyone,I was asked to build a device to switch on a solenoid valve for a certain amount of time when an induction welding machine is appyling power to the heating coil. this is to dispense an inert gas on the part being welded to avoid oxidation. that would be a very easy task if i could get some signal from the welding machine itself, but i am not allowed to connect anything there, so I have two solution: the first is a temperature sensor, switching on the valve when the part start heating up, but the temperature there will rise to about 800 C and sensor positioning would be difficult (not much space there).The second solution I could think of is some sensor to detect the RF field in the vicinity of the heating coil (obviously not near enough to get heated). Anyone has an idea on how I can accomplish that? All I know is that the RF is in the range of 500~600 KHz.Thanks a lot!