110917-1339 EDT
ptonsparky:
Need more information on this current sensing device.
Is it two wire?
How is the contact rating defined? AC, or DC, or AC-DC?
Any minimum supply current requirement?
An assumption by me, it is AC only, and is a two wire device. For this device to work it has to have power from somewhere. The only possible source is the two wires. Thus, when the switch is off there must be current flowing thru the two wires.
Run this experiment:
Connect the device in series with a 25 W incandescent bulb. When cool, not bright light, the resistance may be about 4 * 10 or 40 ohms. Actual on samples -- 15 W 80 ohms, 25 W 44 ohms, and 40 W 26 ohms. Calculated at 120 V input 15 W 960 ohms, 25 W 576 ohms, 40 W 360 ohms.
Next you need a variable current to pass thru the current sensor in the device. Adjust this current up and down near the desired threshold point. Do you get reliable switching operation? When the device is activated, output contact closed, the 25 W bulb will be bright and about a 0.2 A load on the device. When the device is off the 25 W bulb will have little voltage drop across it. When the device is on, then virtually 120 V - whatever is required to make the electronics work.
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