80G radar level measurement, apt for high-temp, high-pressure, and corrosive tanks
1.Introduction
KLD803 80G radar level gauge uses FMCW tech. The antenna emits a high-frequency FM radar signal with linearly increasing frequency. The transmitted signal, after reflection by the medium, is received by the same antenna. The frequency difference between the transmitted and received signals is proportional to the measured distance. The collected frequency difference signal undergoes FFT to get the echo spectrum and calculate the target distance.
2.Product Dimension
3. Working Principle
The radar antenna transmites narrow microwave pulse which will be reflected back when reaching the surface of the medium tested and then received again by the antenna system. The signals shall be transmitted to the electric circuit and then converted into level signals. As the transmission speed of microwave is so fast, the time used for the microwave transmission to the surface of the medium tested and then reflected back is almost 0.
4.Technical Features
- Millimeter wave radar, the measurement accuracy can reach up to ±2mm, and the minimum measurement blind zone is 0.05m.
- The smaller antenna size satisfies the measurement of more working conditions.
- A variety of lens antennas, smaller launch angles, more concentrated energy, stronger echo signals, and higher reliability than other radar products under the same industrial and mining conditions.
- It has stronger penetration and can be used normally in the case of adhesion and condensation.
- The dynamic signal range is larger, and the measurement of low dielectric constant media is more stable.
- Multiple measurement modes, radar response in fast measurement mode
5.Technical Specification and Model Selections
| Model | KLD803 |
| Medium | strong corrosive liquid, steam, foam |
| Measuring range | 0.1m~10/20/30/60/100m |
| Process connection | flange ≥ DN50 |
| Process temperature | -40～130℃ |
| Process pressure | -0.1～2.5 MPa |
| Antenna size | 34mm lens antenna (according to flange size) |
| Antenna material | PTFE |
| Accuracy | ±1mm (range below 35m) ±5mm (range between 35m and 100m) |
| Protection class | P67 |
| Center frequency | 80GHz |
| Launch angle | 3° |
| Power supply | Two-wire /DC24V / four-wire /DC12~24V / four-wire /AC220V |
| Casing | aluminum/stainless steel |
| Signal output | two-wire /4...20mA/HART protocol four-wire / 4...20mA/ RS485 Modbus |
6. Installation Requirements
When installing the instrument, avoid installing it above the material inlet, and try to avoid various objects that affect the signal, such as stirring paddles, etc.
7. Electrical Connection
Power Supply
(4～20) mA/HART(2 wire)
The power supply and the output current signal share a two-core shielded cable. Please refer to the technical data for the specific supply voltage range.
(4～20) mA(4 wire/6 wire)
The power supply needs to be powered separately, and a four-core shielded cable is used for the power supply and current signal (the current signal and the RS485 interface can be output at the same time, and a six-core shielded cable is required for simultaneous output).
RS485/Modbus
The power supply needs to be powered separately, and a four-core shielded cable is used for power supply and digital signal. (The current signal and the RS485 interface can be output at the same time, and a six-core shielded cable is required for simultaneous output).
8.Connection
9.Sensor linearity
Beam Angle
The beam angle is the beam angle at which the energy density of the radar wave reaches half of its maximum value (3dB width). Microwaves emit signals out of beam range and can be reflected by interfering objects.
| Lens Antenna Diameter | Φ32mm lens Antenna | Φ42mm lens Antenna | Φ76mm lens Antenna | Φ74.7mm lens Antenna with air purge |
| Beam Angle | 7° | 6° | 3° | 3° |
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80G radar level measurement, apt for high-temp, high-pressure, and corrosive tanks Images
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