LVU-150-R Submersible IP68 ultrasonic Level Switch

Supported Applications

The Omega LVU-150 Series consists of submersible ultrasonic level switches designed for accurate and reliable liquid level detection. These sensors utilize a fork-shaped design with two piezoelectric crystals—one as a transmitter and one as a receiver—to detect the presence of liquid in an air gap between the fork points. The series is engineered to resist vapor and turbulence, providing high sensitivity while remaining not sensitive to changes in viscosity, density, or conductivity.

Operating Conditions & Performance

The LVU-150 Series operates within a process temperature range of -40 °C to 80 °C (-40 °F to 176 °F). Accuracy is specified as ±1 mm (0.04 in) in water, with repeatability of ±0.5 mm (0.02 in) in water and a dead band hysteresis of 1 mm in water. The sensors are rated for NEMA 6 (IP68) submersible operation.

Power requirements are 12 Vdc to 36 Vdc with a maximum current consumption of 25 mA. For Polypropylene (PP) models, the pressure rating is 150 psi @ 25°C (76°F), derated at 1.667 psi per °C above 25 °C (76 °F). The document notes that the maximum pressure rating for PFA models is not explicitly stated.

Key Performance Specifications

• Accuracy: ±1 mm (0.04 in) in water
• Repeatability: ±0.5 mm (0.02 in) in water
• Hysteresis: 1 mm in water
• Process Temperature: -40 °C to 80 °C (-40 °F to 176 °F)
• Enclosure Rating: NEMA 6 (IP68) submersible sensor and cable
• Loop Resistance: 600 Ω @ 24 Vdc

Configuration Options

The series offers configurable options for wetted materials, overall length, and process connections to accommodate specific installation needs. The sensor body is available in Polypropylene (PP) or Perfluoroalkoxy (PFA). Standard models feature a 3 m (10 ft) cable, with extended lengths of 7.62 m (25 ft) or 15.24 m (50 ft) available by adding the suffix “-25” or “-50” to the model number.

Available Configurations

• Sensor Materials: Polypropylene (PP) for models LVU-150 and LVU-152; Perfluoroalkoxy (PFA) for models LVU-151 and LVU-153.
• Overall Lengths: 76.2 mm or 114.3 mm L (3.0 in or 4.5 in).
• Diameter: 26.7 mm (1.05 in).
• Process Connection: 3/4 NPT.
• Cable Lengths: Standard 3 m (10 ft); special lengths of 7.62 m (25 ft) or 15.24 m (50 ft).

Output and Electrical Options

• Relay Output: SPST Relay Standard.
• Contact Rating: GP: 60 Vac/Vdc @ 1 A; CE: 60 Vac/Vdc @ 1 A.
• Switch Mode: Selectable NO or NC states.

Key Product Differences

The LVU-150 Series is distinguished by material composition and physical dimensions. Models ending in "-R" denote the standard configuration with a 3 m (10 ft) cable. The series includes four primary variants:

• LVU-150-R: Ultrasonic Sensor, Polypropylene (PP), 3 x 3/4 NPT.
• LVU-151-R: Ultrasonic Sensor, Perfluoroalkoxy (PFA), 3 x 3/4 NPT.
• LVU-152-R: Ultrasonic Sensor, Polypropylene (PP), 4.5 x 3/4 NPT.
• LVU-153-R: Ultrasonic Sensor, Perfluoroalkoxy (PFA), 4.5 x 3/4 NPT.