Flowline, LU77-5004, EchoSwitch II 9.8' Range Ultrasonic Level Switch & Controller w/ 4-20mA OutputThe general purpose ultrasonic level sensor provides continuous level detection to 9.8' with 3 programmable relays for level switch or control functions, and a 4-20mA signal output. The sensor is programmed via the integral push button display module. Each relay can be configured on a single set point (high level alarm or low level alarm) or latched on two set points for automatic fill or empty in simplex (one pump or valve), duplex (two pumps) or triplex (three pumps) level control modes with selectable time delay and fail-safe logic. The embedded level controller can lower cost by replacing external control hardware. This non-contact liquid level sensor is ideally suited for corrosive, sticky or dirty liquids, and is broadly selected for pump lift station, sump and day tank level applications.Features:9.8' detection range Configuration is simple via integral push button display moduleThree programmable relays for switch, pump control and fail-safety 1 pump or valve with 2 alarms2 pumps (lead-lag) with 1 alarm2 pumps (duplexing) with 1 alarm3 independent switch point alarms4-20 mA output can be used to provide local or remote level indication. LCD display indicates level height in engineering units and relay statusNarrow 2" beam width for applications with limited measurement space 4" dead band maximizes the measurable filling capacity of the tankPVDF transducer and NEMA 4X polycarbonate enclosure for corrosive liquidsAutomatic temperature compensation for accurate measurementSuccess:Thermal electric power plants make electricity by converting water into high-pressure steam that drive turbines. Used steam then passes through cooling towers where it condenses back to water for recirculation. US power plants draw in more than 200 billion gallons of water per day. The reliable management of water cooling, containment and delivery is core to their process. Here, an EchoSwitch multi-point ultrasonic level switch-controller is mounted over a concrete sump. The sensor monitors water level and automatically empties the sump when full.