Non-contact radar model R82 pulse burst radar transmitter

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.

Technology

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:

1. Frequency Modulated Continuous Wave (FMCW)
2. 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)

Features

• 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)

Options

• 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)