The intrinsically safe 26 GHz. pulse radar transmitter provides continuous level measurement up to 229.7’ (70m) with a 4-20 mA analog and HART digital signal output, and is configured via its integral push button display module or HART communicator. The non-contact solids level sensor is intended for dry solid media including aggregates, grains, pellets, powders and building materials. Select this sensor for challenging process conditions with moderate to significant dust, and installation with an adjustable gimbal flange or mounting bracket. Typical applications include silos, stockpiles, transfer stations and crushers.


  • Rugged 316L stainless steel antenna and process mount
  • Configuration via push button display or HART communicator
  • Gimbal flange for easy positioning with the angle of repose
  • Antenna air-purge for use with significant dust conditions
  • 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
  • PTFE antenna cover for use with moderate dust conditions
  • Recognition, storage and rejection of false echo signal returns
  • IP67 stainless enclosure with polycarbonate display window


P/N Description From
LR41-5021-40-00 4” (98mm) horn, 1-1/2” NPT, 316L $3,100.00
LR41-5021-A0-00 4” (98mm) horn w/shield, 1-1/2” NPT, 316L $3,300.00
LR41-5321-44-00 4” (98mm) horn, 4” ANSI flange, 316L $3,400.00
LR41-5321-A4-00 4” (98mm) horn w/shield, 4” ANSI flange, 316L $3,500.00
LR97-S006 1-1/2 NPT, mounting bracket, 304 $190.00
LB12-1001 Intrinsic safety barrier $1,200.00


Range: 12” to 229.7’ (30cm to 70m)

Frequency: 26 GHz.

Accuracy: ± 15mm

Dead band: 12” (30cm)

Beam angle: -5_21-4: 8º

Configuration: Push button, 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: -40º to 752º, C: -40º to 400º

Temp. comp.: Automatic

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

Pressure: Atmospheric

Enclosure rating: IP67

Encl. material: 316L stainless steel w/silicone gasket

Encl. window mat.: Polycarbonate

Conduit entrance: (1) 1/2” NPT connector

Antenna material: -5_21-4_: 316L, -5_21-A_: 316L & PTFE

Air purge fitting: 1/4” (6.3mm) I.D. tubing

Process mount: -_0: 1 1/2” NPT, -_4: 4” gimbal flange (ANSI)

Classification: Intrinsically safe

Approvals: ATEX II 1C Ex ia III C T76º C…T146º C Da; IEC Ex ia III C T76º C…T146º C Da; CSA Class I, Division 1, Groups A, B, C, D; Class II, Division 1, Groups E, F, G; (T6…T3) Class I Zone 0 AEx ia IIC (T6…T3) Ga Zone 20 AEx ia IIIC (T76ºC to T146ºC) Da Ex ia IIC (T6…T3) Ga Ex ia IIIC (T76ºC to T146ºC) Da

Entity parameters: Install per control drawing #301901

Certification: FCC

Compliance: CE, 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.