Two-Wire Ultrasonic Level Transmitter
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Manufacturer: Omega(USA)
Model: LVU201
Introduction:
 The two-wire ultrasonic level transmitter is the compact solution for non-contact continuous level measurement in process vessels, storage tanks and open channels. The loop powered device provides accurate level measurement up to 18 feet and is the ideal choice for more challenging coating or scaling type liquids including sodium hydroxide, wastewater, resin, wax, liquor and bleach. An ultrasonic sound wave is pulsed two times per second from the base of the transducer. The sound wave reflects against the process medium below and returns to the transducer. The microprocessor based electronics measure the time of flight between the sound generation and receipt, and translates this figure into the distance between the transmitter and process medium below.
The surface of the level being measured must be free of fumes, vapors, foam and the surface must be flat; the signal may be lost if any of these conditions are present.
Specifications:
Range: 0.5 to 18 feet
Accuracy: ± 0.25% of span
Resolution: 0.125" (3 mm)
Frequency: 50 kHz
Pulse rate: 2 pulses/second
Beam width: 8° conical
Blocking distance: 6" minimum
Display type: 4 segment LCD
Display units: Inch / cm
Supply voltage: 16-36 Vdc std; 14-32 Vdc for IS-CSA version
Max loop resistance: 900 ohms @ 36 Vdc
Signal output: 4-20 mA
Signal invert: 4-20 / 20-4 mA
Calibration: Push button
Fail-safe diagnostic: Reverts to 4 mA or 22 mA
Temperature rating: -40 to 60°C, (-40 to 140°F)
Temp. compensation: Automatic over entire range
Pressure rating: 30 psi @ 25 °C., derated @1.667 psi per °C. above 25°C.
Enclosure rating: NEMA 4X / IP65
Enclosure mat’l: Polypropylene
Transducer mat’l: Polyvinylidene Fluoride
Mounting threads: 2" NPT
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