LR16

Supported Applications

The Omega EchoPro LR16 is an intrinsically safe, two-wire pulse radar level transmitter designed for continuous liquid level measurement. It operates by emitting a microwave pulse and measuring the time of flight to provide a proportional output signal.

Documented applications include:

• Petroleum storage
• Water processing
• Wastewater management
• Diluted chemical storage or process conditions
• Bulk storage and tanker trucks
• Reverse osmosis (RO) storage tanks
• Process tanks, waste sumps, and neutralization tanks

The sensor is suitable for challenging environments involving low or non-corrosive media, light surface foam, agitation, higher temperatures or pressures, condensation, or vapor. It functions in above-grade or below-grade tank installations.

Operating Conditions & Performance

The LR16 series operates at a frequency of 26 GHz with a measurement range from 12" to 98.4' (30cm to 30m). The system includes a dead band of 12" (30cm) and maintains an accuracy of ± 3mm.

Performance is defined by the following environmental limits:

• Ambient Temperature: F: -40° to 176°, C: -40° to 80°
• Process Temperature: F: -76° to 302°, C: -60° to 150°
• Storage Temperature: F: -40° to 176°, C: -40° to 80°
• Pressure Rating: -14.5 to 150 psi (-1 to 10 bar)

The unit features an IP67 enclosure rating and includes automatic temperature compensation.

Variations in Beam Angle

• -20 (2" horn): 18° beam angle, dimensions X: 2" (48mm), Y: 5.51" (140mm)
• -30 (3" horn): 12° beam angle, dimensions X: 3" (78mm), Y: 8.94" (227mm)
• -40 (4" horn): 8° beam angle, dimensions X: 4" (98mm), Y: 11.34" (288mm)

Configuration Options

The LR16 series is configurable across antenna sizes, output signals, and mounting options to accommodate specific installation requirements.

Sensor Elements & Antennas

• Horn Sizes: 2" (48mm), 3" (78mm), or 4" (98mm)
• Antenna Material: 316L stainless steel

Outputs & Configuration

• Analog Output: 4-20 mA, two-wire (configurable for 20-4 mA inversion)
• Digital Protocol: HART 7 compatible
• Fail-Safe Options: 3.9 mA, 20.5 mA, or 22 mA
• Configuration Interface: Integral push button display module (LCD dot matrix) or external HART communicator

Housing & Connections

• Enclosure Material: 316L stainless steel with silicone gasket and polycarbonate window
• Process Connection: Standard 1-1/2" NPT
• Electrical Connection: 1/2" NPT connector

Approvals & Certifications

The series carries the following certifications for hazardous locations and compliance:

• ATEX II 1G Ex ia II C T6...T3 Ga
• IECEx ia IIC T6...T3 Ga
• CSA Class I, Div 1, Groups A, B, C & D; Class II, Div 1, Groups E, F & G (T6...T3)
• Class I Zone 0 AEx ia IIC (T76°C to T146°C) Da
• Ex ia IIC (T6...T3) Ga & Ex ia IIIC (T76°C to T146°C) Ga
• FCC, CE, CRN, RoHS compliant

Key Product Differences

The primary variation within the LR16 series is defined by antenna size and beam angle. The 2" horn (-20 code) provides an 18° beam angle suitable for general applications. For tighter focusing, the 3" horn (-30 code) offers a 12° beam angle, while the 4" horn (-40 code) delivers an 8° beam angle.

Mounting flexibility is achieved through optional accessories rather than integral housing changes. The standard unit features a 1-1/2" NPT process connection; however, ANSI flanges (3", 4", or 6") and reducer bushings are available as separate orderable items to adapt the sensor for different tank nozzles.

Output configuration allows selection between direct level indication (4-20 mA) or inverted output (20-4 mA). The integral display module provides local visualization of feet, meters, percent of span, and echo signal curves without requiring an external communicator.