The Riley Sensor Corp 420XL Industrial Current Sensor is a doughnut-type, through-hole current monitor with a 2-inch-diameter opening for the primary conductor. It operates on 5–40 V DC and provides a 4–20 mA output proportional to the sensed current, with two selectable ranges: 0–300 A (25503-003-01) and 0–500 A (25503-003-03). The enclosure measures 4.0" high by 5.40" wide by 1.5" deep, enabling compact clamp-on installation in industrial panels and equipment racks, and it is designed for monitoring high-current AC lines in demanding environments.
