USR03-Series

Supported Applications

The Omega U-Series ultrasonic distance sensors (models USR03, UMR14, ULR30, UXLR50) perform non-contact target distance measurement designed for tough industrial environments. Documented applications include roll diameter monitoring, loop control, web break detection, dimensioning, proximity sensing, sort/select operations, and level measurement.

Operating Conditions & Performance

The series operates in ambient temperatures from -40 to +158 F (-40 to +70 C) with internal or external reference target temperature compensation. Sensors are rated for 0-100% humidity (avoiding heavy condensation) and feature IP-68, NEMA-4X ingress protection. Measurement accuracy is better than 0.5% of the target distance in a stable, homogeneous air environment; performance may be affected by temperature gradients, target echo strength, or speed of sound variations.

Performance specifications vary by model range:

• USR03: Maximum range 3 ft (91cm); deadband minimum 1.75 in (4.4 cm). Repeatability is the greater of +/-0.03 in. (0.76 mm) or 0.25% of target distance.
• UMR14: Maximum range 14 ft. (4.3 m); deadband 4 in. (10.2 cm). Repeatability matches USR03 specifications.
• ULR30: Maximum range 30 ft. (9.1m); dead band 10 in. (25.4cm). Repeatability is 0.2% of target distance.
• UXLR50: Maximum range 50 Ft. (15.2m); dead band 12 in. (30.5cm). Repeatability matches ULR30 specifications.

Default measurement rates are 50 msec (20 Hz) for USR03/UMR14, 100 msec (10 Hz) for ULR30, and 200 msec (5 Hz) for UXLR50. Rates are adjustable from 5 msec to 2.8 hours; faster rates limit maximum target distance.

Configuration Options

The series supports multiple output configurations selectable via OmegaVIEW software or rear pushbutton TEACH adjustment (except on serial-only and UXLR50 models). Full-featured USR03/UMR14 sensors provide two outputs, while ULR30 and UXLR50 offer five simultaneous outputs. Available signal types include:

• Voltage: 0-10 VDC (or custom via OmegaVIEW; 10 mA max).
• Current Loop: 4-20 mA sourcing or sinking, configurable to 0-20 mA.
• Switches: PNP or NPN solid-state switches rated at 150 mA (external 40 VDC max.), configured for setpoint or window mode with reversible polarity (NO/NC).
• Serial Data: RS-232 or RS-485 interfaces supporting Modbus slave, ASCII streaming, or SYNCH protocols. RS-485 models support 2-wire multi-drop addressing (addresses 1-247) with baud rates from 9600 to 115200.

Power requirements are 10-30 VDC @ 55 mA max for USR03/UMR14 and 10-30 VDC @ 70 mA max for ULR30/UXLR50. Sensors feature embedded shielded PUR cables with tinned wire ends (6-wire or 9-wire depending on series) or optional M12 connectorized cables.

Key Product Differences

The USR03-Series encompasses four primary sensor families distinguished by range, housing material, and mounting options:

• USR03: 3 ft (91cm) maximum range; housed in 316 stainless steel with M30x1.5 mm or 1-in NPT thread.
• UMR14: 14 ft. (4.3 m) maximum range; housed in 316 stainless steel with M30x1.5 mm or 1-in NPT thread.
• ULR30: 30 ft. (9.1m) maximum range; housed in 316 stainless steel with dual 1.5-in NPT threads.
• UXLR50: 50 Ft. (15.2m) maximum range; available in 316 stainless steel or PVC housing. Mounting options include clamp mount, rear-mounted 1.5-in NPT, or dual 2.5-in NPT threads.

Model numbers follow the structure [PRODUCT]-[MOUNT]-[SERIAL INTERFACE], where serial interface codes denote RS-232 (PC COM port) or RS-485 (addressable multi-drop). Accessories include OmegaVIEW software, USB interface kits, mounting brackets (MB30-SS90), and stainless steel nuts.