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Krohne Radar level transmitters / OPTIWAVE 6400 C
VFDC4020002114801A0ME1003 - (Level Transmitter for solids from granulates to rocks)
The OPTIWAVE 6400 C works on the Frequency Modulated Continuous Wave (FMCW) radar principle, transmitting a radar signal that sweeps in frequency. This signal reflects off the product surface, and its time delay is measured. The difference between the transmitted and received frequencies is proportional to the distance to the product, which is calculated using a Fast Fourier Transform (FFT) to determine the level, volume, and mass of solids in a vessel.
How the OPTIWAVE 6400 C Works
- Signal Transmission: The OPTIWAVE 6400 C emits a high-frequency radar signal from its antenna.
- Frequency Sweep: The frequency of this transmitted signal increases linearly over time, a process known as frequency modulation.
- Reflection: The radar wave travels to the surface of the product (solids) and reflects back to the antenna.
- Time Delay: The reflected signal returns after a time delay, which is directly related to the distance to the product surface.
- Frequency Difference: Because the transmitted signal's frequency is constantly changing, the frequency of the received signal will be different from the transmitted signal at any given moment.
- Fast Fourier Transform (FFT): The difference in frequency between the transmitted and received signals is calculated and then transformed into a frequency spectrum using an FFT.
- Distance Calculation: The frequency difference (Δf) in the spectrum is proportional to the time delay, and thus to the distance (d) to the product surface (t = 2d/c, where c is the speed of light).
- Level Calculation: The measured distance from the radar to the product surface is subtracted from the total height of the tank to calculate the product level.
Key Features and Benefits
- Non-Contact Measurement: It measures the level of solids without touching the product.
- FMCW Radar: This technology provides accurate and reliable readings, even in dusty atmospheres or with uneven product surfaces.
- 24 GHz Frequency: The 24 GHz frequency offers a small beam angle, which minimizes false readings from obstacles in the tank and allows for precise measurements.
- Versatility: It is ideal for measuring various solids, including granulates, powders, and rocks, in silos and bulk storage.
- User Interface: It features a single, user-friendly interface for all applications.
 Full Datasheet
Transmitter & Antenna Feature
- Manufacturer : Krohne - OPTIWAVE 6400 C
- Product No. : VFDC4020002114801A0ME1003
- VFDC - OPTIWAVE 6400 C 24 GHz radar (FMCW) level transmitter for solids from granulates to rocks (up to 16 barg (232 psig) and 130°C (266°F))
- Special number : 4
- Special number : 0
- Regional directives: 2 - China
- Ex approvals : 0 - Without
- Special number : 0
- Construction: 0 - Without
- Converter version (Housing material / IP class): 2 - C / Compact version (aluminium housing – IP66/68 0.1 barg)
- Outputs : 1 - 2-wire / 4...20mA passive HART®
- Cable entry / cable gland: 1 - M20×1.5 / without
- Display :4 - Plug-in display (cover with window)
- Display – Documentation language: 8 - Chinese (simplified)
- Special number : 0
- Process conditions (Pressure, temperature, material and remarks) / Process seal: 1 - 1…16 barg (-14.5…232 psig) / -40°C...+130°C (-40°F…+266°F) / FKM/FPM
- Antennas (antenna type, material, radio approval): A - Drop, DN80 (3¨)/ PP / LPR 4
- Antenna extension / Flange plate protection: 0 - Without
- Process connection: Size / Pressure class / Flange face finish: ME1 - DN100 PN16 – Type B1 (EN 1092-1 flange
- Calibration certificate: 0 - Without: Accuracy ±2 mm (±0.08¨)
- Accessories / Tag plate: 3 - Stainless steel Tag plate (18 characters max.)
There are several Model of pressure transmitters, for more details read the PDF below
Basic Ordering Information Transmitter
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