DR6421 Radar Level Transmitter
80GHz FMCW High-Precision Non-Contact Liquid Level Measurement
DR6421 Radar Level Transmitter
The DR6421 Radar Level Transmitter utilizes advanced 76-81GHz Frequency Modulated Continuous Wave (FMCW) millimeter-wave technology. Operating at a much higher frequency than traditional Ku-band radars, it delivers a more compact RF architecture, a higher signal-to-noise ratio, a smaller blind zone, and an ultra-narrow beam angle. This high-frequency radar transmitter offers superior penetration and exceptional anti-interference capabilities. Its compact design supports both thread and bracket mounting, making installation fast and adaptable to your specific environment.
Applications
The DR6421 Radar Level Transmitter delivers outstanding reflection cross-sections on media with a dielectric constant greater than 4. It excels in these fields:
- Industrial Process Tanks: Monitors chemical storage tanks, oil tanks, water treatment buffers, and reaction vessels.
- Environmental & Water Management: Tracks open channels, river water levels, flood controls, and reservoir heights automatically without physical contact.
- Corrosive Liquid Control: Measures levels in sewage pools, acid/alkali sumps, and water treatment facilities effortlessly.
Features
80GHz High-Frequency Precision: The 80GHz radar wavelength is only about 3mm, which drastically increases detection accuracy. It limits the measurement error to within 2mm.
Ultra-Narrow 3° Beam Angle: The highly concentrated energy beam easily avoids internal tank obstacles, agitators, and narrow structures, ensuring reliable data even in restricted spaces.
Minimized Near-Range Blind Zone: Features a short minimum blanking distance 30cm recommended gap from the highest liquid level). This maximizes your tank’s usable storage capacity.
Smart Bluetooth & App Debugging: Built-in Bluetooth allows wire-free calibration. Engineers can view real-time echo curves, monitor status parameters, and adjust settings via a mobile app or PC software.
Versatile Signal Outputs: Supports standard 4–20mA (2-wire), RS485 Modbus, and advanced wireless IoT protocols including 4G, NB-IoT, and LoRa.
Industrial-Grade Protection: The fully sealed enclosure carries an IP67 waterproof and dustproof rating, perfectly suited for harsh outdoor environments.
Technical Specs
| Parameter | Specification |
|---|---|
| Measuring Range | 5m, 10m, 15m, 20m (optional) |
| Measurement Error | ±2mm |
| Beam Angle | ±3° |
| Migration Range | ±9.9m |
| Signal Output | 4-20mA, RS485, 4G, NB-IoT, LoRa |
| Power Supply | DC 24V (22V~30V) |
| Operating Temperature | -20°C ~ +70°C |
| Operating Humidity | (0%~95%) RH |
| Protection Rating | IP67 |
| Display | Smartphone App (Bluetooth) |
| Housing Material | High-performance engineering plastic, aluminum alloy, stainless steel |
| Antenna Material | PP |
| Weight | 0.5KG |
| Process Connection | Thread & Bracket |
Ording Guide
Build your custom configuration for the DR6421 Radar Level Transmitter:
DR6421 — [Medium] — [Range] — [Display] — [Output] — [Connection] — [Material] — [IP Rating]
Medium Type:
Y(Liquid)Measurement Range:
5m,10m,15m,20m)Display Configuration:
0(None / App Setup),1(128×64 LCD Display)Signal Output:
ARS485,B2-Wire 4-20mA, C 4G/NB-IoT/LoRaProcess Connection:
G(G1.5 Thread)Housing Material:
P(Engineering Plastic),S(Stainless Steel),A(Aluminum Alloy)Protection Level:
7(IP67)
Outline Construction (Unit: mm)
Electrical Connection
RS485 Communication Wiring Table
| Wire Color | Terminal Function |
|---|---|
| Red | DC 24V Power Supply Positive (+) |
| Blue | DC 24V Power Supply Negative (–) |
| Yellow | RS485 A (+) |
| Green | RS485 B (–) |
FAQ
What are the critical installation requirements for the DR6421 Radar Level Transmitter?
You must follow two main rules for accurate measurement: First, install the instrument perfectly vertical to the liquid surface. Second, maintain a distance of at least 50cm from the tank wall, riverbank, or pool edge, and avoid mounting it directly over liquid inlets or outlets to prevent wave interference.
How do I calibrate and configure this FMCW radar sensor?
The DR6421 supports wireless Bluetooth calibration. Simply download our dedicated mobile app to view real-time echo curves, verify signal quality, and adjust parameters safely. You can also connect it to a PC using an RS485-to-USB converter and deploy our native computer software.
What should I check if the radar meter shows unstable readings or no display?
If the screen or connection fails, verify that your DC 24V power supply meets the current requirements and double-check your wiring polarities. If the values fluctuate, adjust the sensor’s position away from surface turbulence, optimize the vertical mounting angle, or use shielded cables grounded properly to eliminate electromagnetic interference.