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LVU150-Series
Submersible IP68 Ultrasonic Level Switch
- Not Sensitive to Changes In Viscosity, Density, or Conductivity
- 1 A SPST Relay Standard
- Resists Vapor and Turbulence
- NEMA 6 (IP68) Submersible Sensor and Cable
Product Overview
- Accuracy ± 0.04 inH2O
- Approvals General purpose, CE
- Cable Length 1000 ft
- Enclosure Ratings IP68, NEMA Type 6
- Hysteresis 0.04"
- Loop Resistance 600 Ω @ 24 Vdc
- Media Compatibility Clean process / cooling water, Oils / lubricants, Organic solvents
- Operating Pressure, Max 150 psi
- Operating Pressure Note 150 psi @ 25°C (76°F) derated @ 1.667 psi per °C above 25°C (76°F)
- Operating Temperature, Max 80 °C
- Operating Temperature, Min -40 °C
- Process Connection Size 3/4 in
- Process Connection Type NPT Male
- Repeatability ± 0.02 inH2O
- Series ID LVU150-Series
- Supply Power Type DC
- Supply Voltage 12 to 36 Vdc
- Switch Operation Selectable Normally Open or Normally Closed
- Switch Rating 1 A @ 60 VA
- Switch Type SPST
- Wire Gauge 22 AWG
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.
