Ultrasonic Echo Series LU72-74 offers noncontact level detection up to 10 ft in standard 1 in. mount. Optional 2 in. mount version spans to 25 or 40 ft. Both come with 3 SPDT relays and 1-6 setpoints. Each relay can be configured as single setpoint alarm, 2 latched setpoints for automatic fill and empty control, or 2 independent setpoints for out-of-bounds alarming. Automatic temperature compensation is provided over -40 to +160°F. Switch is suited for corrosive, slurry, or waste liquids.