Two-Wire Ultrasonic Level Transmitter
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Manufacturer: Omega(USA)
Model: LVU201A
Introduction: 
The LVU-201A 2-wire ultrasonic level transmitter is the compact solution for non-contact continuous level measurement in process vessels, storage tanks, and open channels. This loop-powered device provides accurate level measurement up to 5.5 m (18') and is the ideal choice for more challenging coating or scaling liquids, including sodium hydroxide, wastewater, resin, wax, liquor, and bleach.
An ultrasonic sound wave is pulsed 2 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.
Specifications:
Range: 0.2 to 5.5 m (0.5 to 18')
Accuracy: ±0.25% of span
Resolution: 3 mm (0.125")
Frequency: 50 kHz
Pulse Rate: 2 pulses/second
Beam Width: 8° conical
Blocking Distance: 15.2 m (6") minimum
Display Type: 4-segment LCD
Display Units: In/cm
Supply Voltage: 12 to 32 Vdc
Max Loop Resistance: 600 Ω @ 24 Vdc
Signal Output: 4 to 20 mA
Signal Invert: 4 to 20 mA/20 to 4 mA
Calibration: Pushbutton
Mountable Gasket: FKM
Conduit Entrance: Single, 1.2 NPT
CE Compliance: EN61326 EMC
Failsafe Diagnostic: Reverts to 4 mA or 22 mA
Temperature Rating: -20 to 60°C (-4 to 140°F)
Temperature Compensation: Automatic over entire range
Pressure Rating: 30 psi @ 25°C, derated @1.667 psi per °C above 25°C
Enclosure Rating: NEMA 4X (IP66)
Enclosure Material: Polypropylene
Transducer Material: Polyvinylidene fluoride
Mounting threads: 2 NPT
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