EchoPro® LR21 Pulse Radar Liquid Level Transmitter





The intrinsically safe 26 GHz. pulse radar transmitter provides continuous level measurement up to 65.6’ (20m) with a 4-20 mA analog and HART digital signal output, and is configured via its integral push button display module or WebCal software. The non-contact liquid level sensor is intended for chemical storage or process applications in above or below grade tanks of any material. Select this sensor for challenging process conditions with corrosive media, light surface foam or agitation, higher temperature or pressure, condensation or vapor, and installation in a flange fitting. Typical applications include bulk storage and process tanks.


316L antenna with PTFE inner shield for corrosive media

Configuration via push button display or WebCal software

26 GHz. pulse radar is unaffected by vapor or condensation

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

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

Fail-safe diagnostics with selectable signal fail-safe outputs

Recognition, storage and rejection of false echo signal returns

IP67 stainless enclosure with polycarbonate display window



Range: 12" to 65.6" (30cm to 20m)
Frequency: 26 GHz.
Accuracy: ± 3mm
Dead band: 12" (30cm)
Beam angle: -30: 12°, -40: 8°
Configuration: Push button, WebCal® PC Windows® USB® 2.0; HART 7
Memory: Non-volatile
Display type: LCD, dot matrix
Display units: Feet and meters
Display bar: Percent of span
Display graph: Echo signal curve
Supply voltage: 21.6 to 26.4 VDC
Max. consumption: 22.5 mA
Signal output: 4-20 mA, two-wire, HART 7
Signal invert: 4-20 mA, 20-4 mA
Signal fail-safe: 3.9 mA, 20.5 mA, 22 mA
Process temp.: F: -40° to 302° 
C: -40° to 150°
Temp. comp.: Automatic
Storage temp.: F: -40° to 176° 
C: -40° to 80°
Pressure: -14.5 to 72 psi (-1 to 5 bar)
Enclosure rating: IP67
Encl. material: 316L stainless stell w/silicone gasket and PBT FR neck
Encl. window mat.: Polycarbonate
Conduit entrance: (1) 1/2" NPT connector 
Antenna material: 316L w/PTFE inner shield
Process mount: -30: 3'' flange (ANSI), -40: 4'' flange (ANSI)
Classification: Intrinsically safe
Certification: FCC
Compliance: CE, CRN, RoHS


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