TDR (Guided Radar) level transmitter
Model: LTDR
Manufacturer: TECFLUID(ITALIA)
Introduction:
LTDR uses TDR (Time Domain Reflectometry) technology.
Low - energy, high - frequency electromagnetic impulses, generated by the sensor’s circuitry, are propagated along the probe which is immerged in the liquid to be measured.
When these impulses hit the surface of the liquid, part of the impulse energy is reflected back up the probe to the circuitry which then calculates the fluid level from the time difference between the impulses sent and the impulses reflected.
The sensor can output the analyzed level as a continuous measurement reading through its analog output, or it can convert the values into freely positionable switching output signals.
LTDR Sensors are also known as Guided Radars or Guided Wave Radars.
To meet the most application requirements, TECFLUID have three different probe types, detailed as follows:
+ Single rod and rope probe
• Suitable for a very wide range of applications and liquids.
• The signal has wider detection radius around the rod. Thus, it is more responsive for measurement signal disturbances which can be easily overcome by observing a few mounting considerations and making simple configuration adjustments to the sensor.
• The single rod probe is also recommended for installation in bypass chambers and stilling wells, which basically act together with the rod as a big coaxial probe.
+ Coaxial probe
• The high frequency measurement signal is completely contained within the outer tube.
• Immune against any external conditions and interfering objects outside its tube.
• Ideal solution for a hassle)free “drop)in anywhere” installation, ensuring reliable measurement under almost any application condition.
• Ideal choice for measuring low reflectivity liquids (i.e. low dielectric constant) such as oils and hydrocarbons.
• Recommended for the use with clean liquids only.
• NOT recommended with viscous, crystallizing, adhesive, coating or sticky liquids, fibrous liquids, sludge, slurry, pulp or any liquids containing solid particles. Such liquids might cause build)up, bridging or clogging inside the coaxial probe.
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Types
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Single rod (up to 3 m)
Coaxial (up to 6 m)
Rob (up to 20 m)
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Accuracy
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± 3 mm |
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Resolution
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1 mm |
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Connections
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G3/4, 3/4" NPT, Clamp |
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Materials
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AISI-316L, PEEK, Viton
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Technical data
Dielectric constant of the product
Temperature
Pressure
Viscosity
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> 1.6
-40 ... +150 ºC
PN40
Up to 5.000 mPa·s
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Power supply
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12 ... 30 VDC
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Outputs
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4 - 20 mA (active)
Switching point (PNP)
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