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Non-contact radar model R82 pulse burst radar transmitter

Radar has been part of the level measurement market for more than thirty years. The early designs used in tank gauging were heavy, expensive, power-hungry and complex. Advancements in radar circuitry have evolved the modern radar transmitter so that now it is light, inexpensive, loop-powered and easy to use. The R82 is the logical extension of that evolution.

Microwave-based radar is a superior measurement technology with its ability to operate effectively in a wide range of process conditions. It has been too expensive to use as a replacement for ultrasonic transmitters in simple, daily applications...until now. The R82 radar transmitter can be considered the answer to almost every daily level measurement application imaginable.

Pulsar R82

Non-Contact Radar

Non-Contact Radar level transmitters are offered with various operating frequencies, each having their own advantages.

There are two types of Non-Contact Radar transmitters:

  • Frequency Modulated Continuous Wave (FMCW)
  • Pulse Burst Radar

FMCW devices transmit a continuous signal with a constantly changing frequency down toward the liquid. The detected difference in frequencies between the transmitted signal and return echo is proportional to the distance.

Pulse Burst Radar transmitters, the older of the two types, emit short bursts of energy to a liquid surface, and incorporate ultra-high-speed timing circuitry to measure the time of the return signal reflected off the liquid surface.  Distance is then calculated utilizing the equation:

Distance = C x Transit Time/2, (where C = Speed of Light)

Non-contact radar technology


  • 24 VDC, loop-power with HART®
  • Housing: Lexan® or cast aluminum
  • Range: 15" (380 mm) to 40 feet (12 m) measured from process connection
  • Antenna: Encapsulated horn - polypropylene or Tefzel®
  • Process Temperature: -40 to +200 °F (-40 to +93 °C)
  • Process Pressure: Vacuum to 200 psig (-1 to 13.8 bar)


  • General Purpose and Intrinsically Safe approvals
  • Lexan or cast aluminum, single compartment housing
  • ¾" NPT or M20 conduit connections
  • Fully encapsulated antenna of polypropylene or Tefzel®
  • Process Connections: 2" NPT or BSP
  • Antenna extensions for nozzle heights up to 12" (300 mm)

Operating principle

The R82 radar transmitter is based on pulse burst radar technology with equivalent time sampling circuitry. Short bursts of 26GHz microwave energy are emitted and subsequently reflected from the liquid level surface. Distance is calculated by the equation D = Transit time (round-trip)/2. Liquid level is then calculated by applying the user's tank height and sensor offset values.

Tank height & sensor offset
Tank height & sensor offset


ATEX Ex ia
CCOE Ex ia
EAC (GOST) Ex ia, Metrology
IEC Ex ia
Inmetro Ex ia
SIL SIL 1 (1oo1)

Other approvals are available. Consult factory for more details.


Approvals & certificates

ATEX Ex i certificate Model R82
FM certificate Model R82 - IS, NI
FMEDA Report Model R82
IECEx I certificate Model R82

Instruction manuals

Model R82 I&O Manual
Model R82 Pulse Burst Radar Transmitter, 26GHz model for light industrial applications.

Product catalogs

Pulsar® model R82
Model R82 Pulse Burst Radar Transmitter, 26GHz model for light industrial applications.

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