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 703 series Guided Wave Transmitter   Printer Friendly Version
The 703 GWR transmitter combines TDR (time domain reflectometry), ETS (equivalent time sampling) and modern low power circuitry. This combination of technologies brings to the level market a high-speed radar circuit (speed of light transmission) at a fraction of the cost of conventional radar. The selection of probe types makes the 703 a versatile level tranmitter in many applications.
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Guided Wave Radar is based upon Time Domain Reflectometry (TDR). TDR utilizes pulses of high frequency electromagnetic energy transmitted down a probe. When a pulse reaches a surface that has a higher dielectric than the vapor space in which it is traveling, the pulse is reflected. High-speed timing circuitry precisely measures the total transit time and provides an accurate measure of the liquid level.


  • Two-wire, 24 VDC loop-powered level transmitter
  • Low dielectric measurement capability
  • IS (intrinsically safe), XP (explosion proof), and Non- Sparking approvals
  • 4.90 m (16 foot) maximum range

  • Operating Temperature: -40° F to +160° F (-40° C to +70° C)
  • Operating Pressure: 400 psig (26 bar)
  • Humidity: 0-99%, non-condensing

  • Input: 12 to 28.6 VDC
  • Output: 4 to 20 mA

 Literature: (US English)
  Instruction Manual

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