Radar Liquid Level Sensor
  • Radar Liquid Level Sensor
  • Radar Liquid Level Sensor
  • Radar Liquid Level Sensor

    • Radar Level Measurement

    Radar Liquid Level Sensor

    76–81GHz millimeter wave radar sensor for precise level measurement of water or slurries in tanks, sumps and reservoirs

    Working in the 76-81 GHz range with FMCW (Frequency Modulated Continuous Wave) technology, these radar sensors provide precise water-level monitoring for storage tanks, fire-protection reservoirs, rivers, and open channels. They collect measurements automatically and send the data to the monitoring system without needing anyone on site. Users can access the software and mobile app to check the current water level, review previous readings, save the data they need, and receive alerts if anything changes unexpectedly.

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    Parameters
    • Frequency Range 76–81 GHz
    • Process Temperature -40 to +85 °C
    • Accuracy ±1 mm
    • Measuring Range 0.1–15m/30m/60m
    • Beam Angle 6°
    • Measured Medium Water/Sludge/Snow
    • Ingress Protection IP68
    • Housing Material Aluminum Alloy / PC+ABS
    • Communication Interface RS485/Modbus Protocol, TTL, Bluethooth
    • Surge Protection 2 kV
    • Power Supply 9–28 V DC (12V recommended)
    • Dimensions (L×W×H) 66 × 66 × 77.8 mm
    • Weight 230 g
    Dimensional Drawing
    Dimensional Drawing
    Features
    • The radar liquid level sensors work with an 80 GHz FMCW signal and a narrow 6° beam, which helps them stay stable even in the tight and complex conditions found in underground city pipelines and inspection chambers.
    • Use an adaptive algorithm designed for natural water environments, so the signal can pass through floating plants and keep tracking the surface level even when there are waves or turbulence.
    • High-frequency millimeter-wave technology helps the sensors maintain stable, accurate readings over long periods. They also meet the Level-1 accuracy standard from the Ministry of Water Resources, confirming reliable performance even when conditions change.
    • Certified with the Level-1 accuracy standard from the Ministry of Water Resources. They also support RS-485 (Modbus), TTL, and 4G outputs, making it easy to integrate them into a wide range of IoT monitoring platforms without extra complications.
    Applications
    Water Management

    Water Management
    Used to monitor water levels in rivers and channels.

    Urban Infrastructure

    Urban Infrastructure
    Suitable for measuring water levels in municipal inspection wells.

    Fire safety Systems

    Fire safety Systems
    Used to track the water level inside fire-fighting water tanks.
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    FMCW millimeter-wave radars work without touching the medium, so there’s no need to install a guided-wave probe inside every tank. Multi-tank setups become much simpler to install and maintain, especially when several tanks run in parallel. The high-frequency signal, typically 76–81 GHz, remains stable even when the surface has foam, swirling liquid, or strong agitation. Since the signal isn’t affected by these disturbances, the radars keep the level readings steady and accurate, even in challenging working conditions.

    FMCW millimeter-wave radar is generally the most reliable choice outdoors. It provides non-contact measurement, carries an IP68 protection rating, and operates safely from -40°C to 85°C. Weather changes, floating debris, and water quality variations don’t impact the reading. Its millimeter-level accuracy is suitable for long-term hydrological monitoring, and features like anti-condensation and anti-buildup help prevent maintenance issues. Because nothing touches the water and the antenna stays clean, the radar can run for years with minimal attention.

    In river channels or monitoring networks with several measuring points, the radar needs to be placed where the surface is open and stable, away from vortexes, pillars, or objects that disrupt the beam. The radar should face the water vertically or with a small angle, up to about 10°, to cover the full range of expected water-level changes. The mounting height must stay at least 0.5 m above the highest recorded water level, while ensuring that the lowest water level is still within the radar’s effective measuring range. Keeping the radar neither too close nor too far from the surface prevents errors and keeps the data reliable.