EchoPro® LR31 Pulse Radar Liquid Level Transmitter





The intrinsically safe 26 GHz. pulse radar transmitter provides continuous level measurement up to 98.4’ (30m) with a 4-20 mA analog and HART digital signal output, and is configured via its remote push button display module or WebCal software. The non-contact liquid level sensor is intended for industrial wastewater, municipal storm or sewer lift station, reservoir, river, canal or open channel applications located below or above grade. Select this sensor for challenging process conditions that may include light surface foam or agitation, small trash or plant material, wind, condensation or vapor. Each comes with a 32.8’ (10m) cable, mounting bracket and display module. The sensor is designed for bracket mount installation suspended above the liquid level.


Rugged IP68 sensor enclosure with 304 SS mounting bracket

Configuration via push button display or WebCal PC software

26 GHz. pulse radar is unaffected by sump process conditions

Wall mounted display with windowed enclosure rated IP67

12” (30cm) dead band enables utilization of the entire sump

LCD displays level in feet or meters with percent of span bar

Optional display mode indicates the echo signal return curve

HART communication in point to point and multi-drop modes

Auto-temperature compensation for accurate measurement

Self diagnostics with selectable fail-safe signal outputs

Recognition, storage and rejection of false echo signal returns



Range: 12" to 98.4" (30cm to 30m)
Frequency: 26 GHz.
Accuracy: ± 3mm
Dead band: 12" (30cm)
Beam angle: 12°
Supply voltage: 21.6 to 26.4 VDC
Max consumption: 22.5mA
Signal output: 4-20mA, two-wire, HART 7
Signal invert: 4-20mA, 20-4mA
Signal fail-safe: 3.9mA, 20.5mA, 22mA
Process temp.:

F: -40° to 212° 

C: -40° to 100°

Temp. comp.: Automatic
Pressure: Atmospheric
Enclosure rating: IP68
Encl. material: Nylon
Cable type: 6-conductor, shielded
Cable length: 32.8' (10m)
Cable jacket mat: PVC
Process mount: 304 SS bracket or 1'' NPT DISPLAY
Display type: LCD, dot matrix
Display units: Feet and meters
Display bar: Percent of span
Display graph: Echo signal curve
Configuration: Push button, WebCal® PC Windows® USB® 2.0; HART 7
Enclosure type: Wall mount
Enclosure rating: IP67
Encl. material: Polycarbonate
Conduit entrance: (2) 1/2" NPT connector 
Memory: Non-volatile
Storage temp.:

F: -40° to 176° 

C: -40° to 80°

Classification: Intrinsically safe
Certification: FCC
Compliance: CE, RoHS


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