
HLK-LD8001H is an 80G frequency band non-contact liquid level detection sensor, a professional water level monitoring radar module, with a measurement range of 0.15~40m, measurement accuracy of ±5mm, resolution of 1mm, high precision, low power consumption, high cost performance, simple testing, and wide application.
01
Module Introduction
Liquid Detection Radar Module

HLK-LD8001H is a radar module specifically designed for hydrological detection. This module adopts the FMCW mode, features a non-contact installation design, is compact in size, and has a strong anti-interference capability, making it suitable for water level monitoring in lakes, rivers, mountain flood warnings, reservoirs, sewage pipelines, and more.
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Module Advantages
Liquid Detection Radar Module
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Non-Contact Water Level Detection
HLK-LD8001H water level monitoring radar module dimensions are 35x35mm, frequency band 77-81GHz, startup time 100ms, operating temperature: -45°C~+85°C, data format: UART output (ASCII/Modbus protocol).
LD8001H radar module measures distance based on the reflection of electromagnetic waves from targets, allowing for non-contact detection of water level heights as well as other liquid heights.
02
Measurement Distance Up to 15~40m
HLK-LD8001H water level monitoring radar module has a measurement range of 15~40 meters, detection angle horizontal ±25° / vertical ±25° (-3dB), external lens antenna horizontal ±3° / vertical ±3°, strong anti-interference capability, long measurement distance, and excellent performance. The module’s wide measurement range and strong anti-interference ability make it suitable for stable monitoring in complex urban underground measurement environments.

03
Accuracy ±5mm, Millimeter-Level Precision
HLK-LD8001H water level monitoring radar module can achieve millimeter-level detection accuracy, with a detection error of ±5mm and a resolution of 1mm, and a startup time of 100ms.
The module has high detection accuracy, low error, fast data acquisition update speed, and quick startup speed, making it suitable for various liquid level detection applications.
04
Serial Output, Simple Testing
HLK-LD8001H radar module supports FMCW modulation mode, UART output, upper computer serial adjustment, and provides product manuals, user guides, and technical support for quick testing and verification of product performance. Additionally, the module supports serial firmware upgrades, making development simple and usage convenient.
03
Module Features
Liquid Detection Radar Module
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Operating Frequency: 80GHz (77~81GHz)
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Output Power: 13dBm (Typ.)
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Modulation Mode: FMCW
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Detection Angle: Horizontal ±25° / Vertical ±25° (-3dB)
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External Lens Antenna: Horizontal ±3° / Vertical ±3°
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Detection Distance: 0.15~40m
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Measurement Accuracy: ±5mm
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Resolution: 1mm
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Startup Time: Fastest 100ms
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Power Supply Requirements: 3.7V (3.5~5V) / ~30mA
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Dimensions: 35x35mm
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Operating Temperature: -45°C~+85°C
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Data Format: UART output (ASCII/Modbus protocol)
04
Application Scenarios
Liquid Detection Radar Module

HLK-LD8001H module is high-performance, has strong anti-interference, long sensing distance, precise measurement, requires no personnel monitoring, has no mechanical wear, is non-contact measurement, has a long lifespan, and is easy to maintain.
The product is mainly used for water level measurement in lakes, rivers, mountain flood warnings, reservoirs, sewage pipelines, and other scenarios. In addition, the module can also be used for non-metallic liquid detection and distance measurement of objects, etc. The module is plug-and-play and can be flexibly applied to different smart scenarios according to user needs.
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