Wattson Sensor

These sensors are required for use with industrial 2 and 3 phase applications.

Most houses in the UK use single phase electricity and only require one clip to measure supply. Some premises have 3 phase electricity installed, this is found in houses with larger electricity loads and most businesses. To measure three phase electricity you will need to purchase 2 extra clips.

Some older Economy 7 installations may also require an extra sensor for connection to the low tariff circuit.