The Hi-Link HLK-LD8001 is a compact 79GHz millimeter-wave (mmWave) radar sensor module engineered for non-contact liquid and material level measurement. Based on advanced FMCW (Frequency Modulated Continuous Wave) radar technology, the module measures distance with high precision and converts it into accurate level data.

Unlike contact-based sensors, the HLK-LD8001 does not touch the liquid or material being measured. This eliminates problems such as corrosion, fouling, contamination, and wear, making it especially suitable for harsh industrial environments. The module integrates the RF front-end, signal processing, and multiple communication interfaces on a compact PCB, enabling easy integration into modern monitoring and control systems.

With a measurement range of up to ~15 meters and millimeter-level accuracy, the HLK-LD8001 is ideal for applications such as water tanks, reservoirs, sewage systems, industrial fluid containers, and material silos.

Key Features - Hi-link HLK-LD8001

• 79GHz FMCW radar technology for precise level measurement
• Non-contact detection – no exposure to liquids or materials
• High accuracy: typical error ±5 mm
• Long measurement range: up to ~15 meters
• Wide beam angle: ~100° horizontal, ~80° vertical
• Stable performance in dust, humidity, temperature changes & low visibility
• Multiple interfaces: UART, SPI, I²C
• Firmware upgradable via UART
• Compact form factor for easy installation
• External lens support to adjust beam angle if required

Technical Specifications - Hi-link HLK-LD8001

• Operating Frequency: 76 – 81 GHz (≈79GHz mmWave band)
• Radar Technology: FMCW (Frequency Modulated Continuous Wave)
• Measurement Type: Distance / liquid & material level detection
• Measurement Accuracy: ±5 mm (typical)
• Maximum Measurement Range: Up to ~15 m (depending on target & environment)
• Beam Width:
• Horizontal: ~100° (−3 dB)
• Vertical: ~80° (−3 dB)
• Interfaces: UART, SPI, I²C
• Firmware Upgrade: Supported via UART
• Module Form Factor: Compact round / small PCB design (radius ~19.5 mm approx.)
• Measurement Method: Non-contact, radar-based

(Refer to the datasheet for complete electrical, mechanical, and environmental specifications.)

Applications - Hi-link HLK-LD8001

• Water tank & reservoir level monitoring
• Industrial liquid level control
• Sewage & drainage system monitoring
• Chemical & corrosive fluid measurement
• Material & bulk storage level detection
• Smart city & environmental monitoring systems
• Industrial automation & process control

Package Includes

• 1 × Hi-Link HLK-LD8001 79GHz Liquid Level Detection Radar Sensor Module