EchoBeam® LR81 80-GHz Radar Liquid and Solids Level Sensor Transmitter
08202-HW-Flow-0202
Overview
The EchoBeam® LR81 delivers reliable, non-contact level measurement for liquids and solids using advanced 80-GHz radar technology. Designed for dependable performance in demanding environments, it remains unaffected by most media, process, or environmental conditions. Configuration is quick and intuitive using the LevelTap™ App, HART communicator, or Modbus interface.
SPECIFICATIONS
Maximum range: Liquid: 98.4’ (30m) with media dielectric ≥ 10 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: 8°
Min. dielectric: ≥ 1.6
Bluetooth version: Bluetooth 5.0
Bluetooth range: 26.2′ (8m)
Configuration: LevelTap™ App (iOS & Android)
Memory: Non-volatile
Signal output: _ _ _ 0: 4-20 mA, two-wire, HART 7; 0 _ _ 1: Modbus, RS485, 9600 baud; 0 0 _ 2: SDI-12
Max. signal dist: _ _ _ 0: 1,000’ (304m); 0 _ _ 1: 3,937’ (1200m); 0 0 _ 2: 2,000’ (609m) divided by number of sensors on the network
Signal fail-safe: Selectable high, low or hold last value
Supply voltage: _ _ _ 0: 12-30 VDC; 0 _ _ 1: 9-27 VDC; 0 0 _ 2: 9-30 VDC
Max. consumption: _ _ _ 0: 22.5 mA; 0 _ _ 1 & 2: 1.5 watt
Process temp.: F: -40° to 176°, C: -40° to 80°
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: Type 6P (IP68)
Encl. material: PVDF (pigmented polyvinylidene fluoride)
Antenna material: PVDF (natural polyvinylidene fluoride)
Cable jacket mat.: PVC (polyvinyl chloride)
Cable seal mat.: Viton GLT (fluoroelastomer)
Cable orientation: Vertical or horizontal
Shielded cable: _ _ _ 0: 2-conductor; 0 _ _ 1: 4-conductor; 0 0 _ 2: 3-conductor
Cable length: 32.8’ (10m)
Conduit connect.: _ _ 0 _: 1” NPT; _ _ 1 _: 1” G
Process mount: _ _ 0 _: 1 1/2” NPT; _ _ 1 _: 1 1/2” G
Mount gasket: _ _ 0 _: N/a; _ _ 1 _: Viton GLT (fluoroelastomer)
Classification: 0 _ _ _: General purpose, cCSAus; 1 _ _ 0: Intrinsically safe, cCSAus, ATEX, IECEx
Approvals: 0 _ _ _: C22.2 No. 61010-1-12; 1 _ _ 0: Ex ia IIC T6…T4 Ga Ex ia IIIC T85…T135 Da Class I, Zone0, AEx ia IIC T6…T4 Ga Zone 20,AEx ia IIIC T85…T135 Da Class I, Division 1, Groups A,B,C,D T6…T4 Class II, Division1, Groups E,F,G T6…T4
Entity parameters: 0 _ _ _: N/a; 1 _ _ 0: Install per control drawing #610130
The LR81 offers maintenance-free 80-GHz radar performance and measures level height, air gap, tank volume, or open channel flow. A rugged PVDF antenna and enclosure ensure durability in corrosive liquid or solids applications, while the IP68 rating supports harsh outdoor or below-grade installations. The sealed 10m PVC jacketed cable enhances protection in aggressive environments. With zero dead band, it maximizes fill capacity in small tanks and can optionally measure through plastic or fiberglass tank walls. Low 9V or 12V operation makes it ideal for battery-powered systems.