mmWave – 80GHz Liquid Level Detection Sensor 40M UART

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mmWave 80GHz Liquid Level Detection Sensor 40M UART
The mmWave 80GHz Liquid Level Detection Sensor is a high-performance radar-based solution designed for accurate, non-contact liquid level measurement in industrial and environmental applications. Based on advanced Frequency Modulated Continuous Wave (FMCW) radar technology, it delivers stable and precise measurements over long distances without being affected by temperature, pressure, vapour, dust, or lighting conditions. With a maximum detection range of up to 40 metres and millimetre-level accuracy, this sensor is ideal for monitoring liquid levels in tanks, reservoirs, rivers, and industrial storage systems. Featuring a narrow 3 beam angle with a pre-installed lens and a reliable UART (Modbus) communication interface, it ensures precise targeting, strong anti-interference capability, and seamless system integration for demanding smart monitoring applications.
Key Features

80GHz mmWave FMCW Radar Technology Enables precise and stable non-contact liquid level measurement
Long-Range Detection up to 40m Suitable for deep tanks, reservoirs, and large-scale installations
High Measurement Accuracy Delivers liquid level accuracy of up to +-5mm
Narrow Beam Angle Design +-3 beam angle with integrated lens for focused and accurate sensing
Robust Environmental Performance Operates reliably in dust, fog, steam, and harsh weather conditions
UART Communication Interface Supports Modbus protocol for easy industrial system integration
Non-Contact Measurement Prevents corrosion and maintenance issues caused by direct liquid contact
Industrial-Grade Design Ideal for continuous operation in demanding environments

Exceptional Long-Range & High-Precision Measurement
The liquid level sensor has a wide measurement range of 0.15m to 40m, making it ideal for monitoring huge bodies of water such as reservoirs and rivers, as well as deep industrial tanks. The large range is paired with a high-precision ranging capability, with an accuracy of +-5mm and resolution of 1mm. This combination ensures that the data collected is both accurate and granular, which is crucial for applications that require precise control and quick notifications.
Focused Detection with Narrow Beam Lens
The radar module uses a custom-engineered lens to emit a narrow +-3 radar beam. This targeted energy concentration improves signal directivity while reducing interference from tank walls, agitators, and other nearby structures. The end result is a more stable and precise reading, even in complex or limited locations, ensuring that the sensor only measures the desired liquid surface.
Robust Performance with Advanced FMCW Technology
The mmWave detecting sensor is highly resistant to environmental interference since it uses FMCW modulation. Its performance is unaffected by environmental conditions such as temperature, pressure, fog, mist, and dust. An integrated anti-interference algorithm further ensures stable operation in environments with strong reflections or multiple targets. This durability makes it a reliable alternative for outdoor installations and tough industrial environments where other technologies may fail.
Non-Contact, Maintenance-Free Operation
The mmWave sensor is mounted above the liquid surface, preventing physical contact with the medium being measured. This non-contact technique is particularly useful for monitoring corrosive, dangerous, or high-purity liquids because it prevents sensor deterioration and fluid contamination. This design not only extends the module’s service life, but also reduces the need for maintenance, lowering the overall cost of ownership.

Figure: How to use 80GHz millimeter-wave liquid level sensor
Applications

Smart water management: Monitoring river, reservoir, and groundwater levels in real time.
Urban infrastructure: Sewage pipeline overflow alert, rainwater collection system management.
Disaster prevention: Liquid level alerts for mountain torrent/debris flow monitoring stations
Industrial monitoring: Non-contact liquid level measuring for chemical storage tanks and wastewater treatment pools

Package Includes:

80GHz Liquid Level Millimeter Wave Radar Module (with lens)x1
1.25mm 6-pin to bare wire cablex1
1.25mm 6-pin to Dupont connector cablex1