1.field magnetic switch 2.LCD display 3. two wire DC with HART 4.IP67 PROTECTION Metal Tube RotameterCharacterized ... instantaneous flow, accumulated flow, and percentage flow, and also provides two – wire current signals output 4 – 20 mA, compatible with HART ... , damping resistance).During the process of achieving equilibrium, the two magnetic fields of the float and the pointer magnetic steel ...