Measurement principle
Low power, nano-second microwave pulses are guided down a probe submerged in the process media. When a microwave pulse reaches a medium with a different dielectric constant, part of the energy is reflected back to the transmitter. The transmitter uses the residual wave of the first reflection for measuring the interface level. Part of the wave, which was not reflected at the upper product surface, continues until it is reflected at the lower product surface. The speed of this wave depends fully on the dielectric constant of the upper product. The time difference between the transmitted and the reflected pulse is converted into a distance, and the total level or interface level is then calculated. The reflection intensity depends on the dielectric constant of the product. The higher the dielectric constant value, the stronger the reflection is.
Guided wave radar technology benefits
1.Highly accurate and reliable direct level measurement with no
compensation needed for changing process conditions (such
as density, conductivity, viscosity, pH, temperature, and
pressure)
2.No moving parts and no re-calibration result in minimized
maintenance
3.Handles vapor, dust, turbulence, and foam well
4.Suitable for small tanks, difficult tank geometry, internal
obstacles, and unaffected by the mechanical design of
chambers
5.Top down installation minimizes risk for leakages
Special Rosemount 5300 features
Optimized to suit more applications
1.Suitable for most liquid and solids level applications and liquid interface applications
2.Handles even the most challenging applications reliably, including process vessels, control, and safety systems
3.Easy retrofit in existing chambers or available as complete assembly with high quality Rosemount 9901 chambers
4.Dynamic Vapor Compensation assures accuracy also in saturated steam
Best performance and uptime
1.Unique Direct Switch Technology and Probe End Projection improve capability and reliability particularly in challenging applications
2.Single lead probe for long measuring ranges, obstructions and low dielectrics ensures reliability in more applications, such as viscous media
3.Smart Galvanic Interface results in a more stable microwave and EMI performance with minimized effects from outside disturbances
Robust design and increased safety
1.Heavy-duty unique hardware for extreme temperature and pressures with multiple layers of protection
2.EchoLogics and smart software functions provide enhanced ability to keep track of the surface and detect a full vessel situation
3.Third party approved for overfill prevention and Safety Integrated System SIL3 suitability
4.Electronics and cable connections in separate compartments provides safer handling and improved moisture protection
5.Online device verification and reliable detection of high level conditions with the verification reflector
Rosemount 5301 and 5302 Level and/or Interface in Liquids
Rosemount 5301 and 5302 Guided Wave Radar Level Transmitters provide industry leading
measurement capabilities and reliability in liquids. Characteristics include:
1.Direct Switch Technology and Probe End Projection to handle low reflective media and long
measuring ranges
2.Wide range of probe styles, materials, and temperatures and pressures for application flexibility
3.HART 4-20 mA, FOUNDATION Fieldbus, Modbus, or IEC 62591 (WirelessHART) with the Smart
Wireless THUM Adapter
4.Safety-certified to IEC 61508 (option code QT)
5.Advanced Diagnostics (option code D01 or DA1)
6.Transmitter verification and high level supervision (option code HL1, HL2, or HL3)
Rosemount 5303 Level for Solids
Rosemount 5303 Guided Wave Radar Level Transmitter provides industry leading measurement
capabilities and reliability on solids. Characteristics include:
1.Direct Switch Technology and Probe End Projection to handle low reflective media and long
measuring ranges
2.Measurement independent of dust, moisture and material fluctuations
3.HART 4-20 mA, FOUNDATION Fieldbus, Modbus, or IEC 62591 (WirelessHART) with the Smart
Wireless THUM Adapter (see page 25 for details)
4.Probes for high physical weight loads (probe type 6A and 6B)
5.Long stud available to prevent contact with nozzle (LS option)