EchoPulse LR20 Radar Liquid Level Sensor Transmitter


The general purpose 26 GHz. pulse radar level transmitter provides continuous level measurement up to 65.6’ (20m) with a 4-20 mA signal output, and is configured via its integral push button display module. 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
  • Simple configuration via integral push button display module
  • 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
  • Fail-safe diagnostics with selectable signal fail-safe outputs
  • Recognition, storage and rejection of false echo signal returns
  • Rugged IP67 aluminum enclosure with polycarbonate window


P/N Description From
LR20-0310-30 3″ ANSI flange, 316L w/PTFE shield $2,800.00
LR20-0310-40 4″ ANSI flange, 316L w/PTFE shield $2,900.00


Select ultrasonic for chemicals and light weight oils; vibration for wastewater with light coating or scaling; buoyancy for clean water and non-coating chemicals.


Range: 12” to 65.6’ (30cm to 20m)

Frequency: 26 GHz.

Accuracy: ± 3mm

Dead band: 12” (30cm)

Beam angle: – 30: 12º, – 40: 8º

Configuration: Push button

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: 16-26 VDC

Max. consumption: 22.5 mA

Signal output: 4-20 mA, two-wire

Signal invert: 4-20 mA, 20-4 mA

Signal fail-safe: 3.9 mA, 20.5 mA, 22 mA

Process temp.: F: -40º to 302º, C: -40º to 150º

Temp. comp.: Automatic

Storage temp.: F: -40º to 176º, C: -40º to 80º

Pressure: -14.5 to 72 psi (-1 to 5 bar)

Enclosure rating: IP67

Encl. material: Aluminum w/silicone gasket

Encl. window mat.: Polycarbonate

Conduit entrance: (1) 1/2” NPT connector, (1) M20 x 1.5 plug

Antenna material: 316L w/PTFE inner shield

Process mount: – 30: 3” flange (ANSI), – 40: 4” flange (ANSI)

Classification: General purpose

Certification: cTUVus, FCC

Compliance: CE, CRN, RoHS


If you want help in selecting a sensor for your application, please submit a Level Questionnaire. An engineer will review your requirements and suggest a product solution via email.