The MLX loop powered indicator incorporates the LCD from the Yokogawa EJX pressure transmitter into a NEMA 4X aluminum housing. The device meets Factory Mutual or FM Explosion Proof requirements. These units are used in hazardous locations as well as other industries where a rugged, weatherproof enclosure is needed. The MLX contains a six digit numerical display with a range of +/- 999999, a six digit alphanumeric display for engineering units, and a 20-segment bar graph indicating 0 to 100% of full scale. These displays are configurable to show the desired number and engineering units. The device can extract the square root from the 4-20 mA signal sent by the differential flow/pressure transmitter displaying the actual flow reading.