The video below briefly explains how it operates:
ILT-6000 FEATURES
- 2 wire, loop powered (24VDC nominal)
 - LCD Display (4-20mA, %, in, and/or cm)
 - Generic HART communication
 - Quick-Cal function for simple recalibration
 - Isolated from process pressure
 - Long Measuring Lengths (up to 35ft)
 - Isolation Well assembly
 - Dual level outputs (total level and interface)
 - Epoxy-Coated Aluminum Enclosure
 - Class I, Division 1, Groups A, B, C, D
 - Class II and Class III, Division 1, Groups E, F, G
 - Class I, Division 2, Groups A, B, C, D
 - Class II and Class III, Division 2, Groups E, F, G
 - Intrinsically Safe Class I / II / III, Division 1, Groups A, B, C, D, E, F, G
 - NEMA 4X
 
630-321-9646