Non-Invasive AC Current Sensor 30A

This non-invasive current sensor clamped around the supply line can measure a load up to 30 Amps.

It does this by acting as an inductor and responding to the magnetic field around a current-carrying conductor. By reading the amount of current being produced by the coil, you can calculate how much current is passing through the conductor.
It is great for building your own energy monitor to keep your power usage down or for building an over-current protection device for an AC load.

Split Core Current Transformer

This sensor does not have a load resistor built in, so in most cases it will be necessary to place a resistor across the output to convert the coil’s induced current to a very small measurable voltage.