EchoBeam® is the most reliable and easy-to-use non-contact level sensor transmitter. Flowline’s 80-GHz radar technology is unaffected by most media, process or environmental factors, and our intuitive LevelTapTM App makes configuration simple.


The LR83 general purpose 80-GHz radar level sensor transmitter provides continuous level measurement up to 98.4’ (30m) for liquids or 49.2’ (15m) for solids, with a 4-20 mA with HART or Modbus signal output. The level sensor transmitter is wirelessly configured over Bluetooth via our LevelTapTM App which enables you to see the level, verify the status, and manage the settings of connected level sensor transmitters from the safety of the ground or nearby catwalk. The level sensor transmitter measures liquid and solids media with a dielectric constant value ≥ 1.6, such as water, chemical or petroleum-based liquids, and pellet, grain, powder or aggregate solids. Select this sensor for tank, sump, weir, canal, reservoir, silo, bin, conveyor or stockpile applications.


  • 80-GHz technology provides reliable, maintenance-free operation
  • Measures level height, air gap, tank volume or open channel flow
  • Rugged PVDF antenna and PBT-FR enclosure for corrosive media
  • IP66/67 enclosure for outdoor installations exposed in all weather
  • LCD push button display for level or flow indication and adjustment
  • Zero dead band maximizes the potential fill capacity of small tanks
  • Optionally measures through top wall of plastic or fiberglass tanks
  • Configuration via LevelTapTM App, LCD display, HART or Modbus
  • Low 9V or 12V operation is ideal for battery powered systems


Download the free LevelTapTM App at the Apple Store, Google Play or Baidu Store, register and go to Demo Sensors. There you can view the level status and step-by-step or advanced configuration examples prior to sensor purchase.


P/N Description From
LR83-0300 1 1/2” NPT, 4-20 mA w/HART $1,055.00
LR83-0310 1 1/2” G, 4-20 mA w/HART $1,060.00
LR83-0301 1 1/2” NPT, Modbus $1,205.00
LR83-0311 1 1/2” G, Modbus $1,210.00
LM50-3S31 Short bracket, 1 1/2″ NPT lock nut, 316L $160.00
LM50-4S31 Short bracket, 1 1/2″ G lock nut, 316L $160.00
LM50-3S32 Long bracket, 1 1/2″ NPT lock nut, 316L $220.00
LM50-4S32 Long bracket, 1 1/2″ G lock nut, 316L $220.00
LM53-0440 Capped adapter, 1 1/2″ NPT to 1 1/2″ tri-clamp, PTFE $220.00
LM53-0444 Capped adapter, 1 1/2″ NPT to 2″ tri-clamp, PTFE $220.00
LM53-2440 Capped reducer, 1 1/2″ to 2″ NPT, PTFE $220.00
LM53-1S80 Adapter, 1 1/2″ NPT to 1 1/2″ tri-clamp, 316L $160.00
LM52-1880 Adapter, 1 1/2″ NPT to 2″ tri-clamp, 316L $160.00
LM53-4855 Adhesive tank top fitting, 1 1/2″ NPT, PVC $160.00
LM53-3850 Flange, 3″ ANSI x 1.5″ NPT, CPVC, schedule 80 $302.00
LM53-3S50 Flange, 3″ ANSI x 1.5″ NPT, 316L $378.00


Maximum range: Liquid: 98.4’ (30m) with media dielectric ≥ 20 and no agitation; Solids: 49.2’ (15m) with media dielectric ≥ 6 and no dust

Frequency: 80-GHz., W-band, FMCW

Accuracy: 0.4m to 30m: ± 2mm; 0.00m to 0.39m: ± 10mm

Dead band: 0” (0mm)

Beam angle: 6°

Min. dielectric: ≥ 1.6

Bluetooth version: Bluetooth 5.0

Bluetooth range: 26.2′ (8m)

Configuration: LevelTapTM App (IOS & Android) or push button

Memory: Non-volatile

Display type: LCD, dot matrix

Signal output: 4-20 mA, two-wire, HART 7 or Modbus, RS485, 9600 baud

Max. signal dist.: 4-20 mA: 1,000’ (304m); Modbus: 3,937’ (1200m)

Signal fail-safe: Selectable high, low or hold last value

Wire interface: 4-20 mA: 2-pole terminal block; Modbus: 4-pole terminal block

Supply voltage: 4-20 mA: 12-30 VDC; Modbus: 9-27 VDC

Max. consumption: 4-20 mA: 22.5 mA; Modbus: 1.5 watt

Process temp.: F: -40° to 212°, C: -40° to 100°

Temp. comp.: Automatic

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

Pressure: -14.5 to 43.5 psi (-1 to 3 bar)

Enclosure rating: NEMA 4X (IP66/67)

Conduit connect.: NPT thread: 1/2” NPT; G thread: M20

Encl. material: PBT-FR (polybutylene terephthalate)

Encl. cap material: PC (clear polycarbonate)

Antenna material: PVDF (natural polyvinylidene fluoride)

Process mount: 1 1/2” NPT or 1 1/2” G

Mount gasket: Viton GLT (fluoroelastomer) for G thread only

Classification: General purpose (cCSAus)

Approvals: C22.2 No. 61010-1-12

Compliance: FCC: Part 15.256, 15.209, 15C; ISED IC: RSS-102, RSS-211, RSS-247; UKCA RER 2017: 6(1)(a), 6(1)(b), 6(2); CE/RED 2014/53/EU: EN 302 372, EN 302 729, EN 301 489-1, -33, EN 300 328; SRRC: (No. [2002] 353); RoHS, REACH, CRN, conflict minerals


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.