FMR57 Radar Level Transmitter Overview
FMR57 is a high-performance radar level transmitter widely used for liquid level and material level measurement in chemical, petroleum, water treatment, and other industries. It adopts high-frequency radar technology and features high precision and non-contact measurement, making it suitable for complex working conditions.
This guide is compiled based on the FMR57 Chinese manual and aims to help engineering technicians and procurement staff quickly understand product features, selection basis, and usage points.
FMR57 Core Technology and Working Principle
FMR57 is based on the frequency modulated continuous wave (FMCW) radar principle. By transmitting a high-frequency signal and receiving the echo, it calculates the frequency difference to accurately measure the level. This technology is not affected by changes in medium temperature, pressure, or density and is suitable for harsh environments.
- Measuring range: maximum 30 m (depending on antenna and working conditions)
- Accuracy: ±2 mm
- Frequency: 80 GHz high-frequency radar
- Process connection: flange or thread
- Protection class: IP67 / IP68 (optional)
The high-frequency design makes the beam angle smaller, making it suitable for narrow containers or working conditions with agitators and effectively avoiding interference.
FMR57 Main Technical Parameters
The table below summarizes the key performance indicators of FMR57 for easy selection comparison.
| Parameter | Specification |
|---|---|
| Measuring principle | FMCW radar |
| Frequency | 80 GHz |
| Measuring range | 0 ~ 30 m |
| Accuracy | ±2 mm |
| Process temperature | -40 ~ +200 °C |
| Process pressure | -1 ~ 40 bar |
| Output signal | 4-20 mA / HART / Modbus |
| Protection class | IP67 / IP68 |
Installation and Commissioning Points
Installation Precautions
- Avoid installation directly above the feed inlet or agitator to prevent false echoes.
- The antenna should be perpendicular to the medium surface to ensure the beam covers the target area.
- For flange installation, note that the inner diameter of the gasket must not be smaller than the antenna diameter.
Commissioning Steps
- Power on and check the instrument self-test status.
- Input the empty tank and full tank calibration points via HART communicator or software.
- Set the medium dielectric constant range to optimize echo processing.
- Observe the echo curve and adjust interference suppression parameters if necessary.
- Save the configuration and record the commissioning report.
For detailed operations, please refer to the FMR57 Chinese manual to ensure correct parameter settings.
Selection and Procurement Recommendations
When selecting FMR57, the following information must be confirmed:
- Process connection: flange specification, thread size.
- Antenna type: horn, rod, or lens antenna to suit different media.
- Output signal: choose 4-20 mA, HART, or Modbus according to the control system.
- Certification requirements: explosion-proof, sanitary, and other special certifications.
When purchasing, please provide complete working condition parameters so that the supplier can recommend the most suitable configuration.
Common Problems and Maintenance
- Fluctuating measured value: check whether the antenna is scaled; clean it and recalibrate.
- No echo signal: confirm whether the medium dielectric constant is too low, or adjust the installation position.
- Abnormal output: check the power supply and wiring, and restore factory settings if necessary.
Regular maintenance can extend the service life of the instrument. It is recommended to check the antenna and sealing status every six months.
Summary
With its high frequency, high precision, and strong adaptability, the FMR57 radar level transmitter has become a reliable choice for industrial level measurement. Through this guide and the FMR57 Chinese manual, users can quickly complete selection, installation, and commissioning, improving measurement efficiency.