Review on Adjustable AC Current Sensing Switch: SZC23 No AL-CH Model, 0.2A-30A Range by Shane Tomko

Works exactly as advertised. With one exception I am completely pleased with this device.The problem is that the slots in the adjustment screws are poorly cut (or cast?) and make getting the screwdriver blade in properly a challenge.IMHO an extra nickel should be spent on the trimpot. I would cheerfully spend another quarter on the device for less troublesome adjustment