YUNYI 4G High-Frequency Wireless Liquid Level Meter
Non-Contact Radar Level Transmitter with 4G Telemetry
YUNYI 4G High-Frequency Wireless Liquid Level Meter combines 80GHz FMCW (Frequency Modulated Continuous Wave) radar technology with integrated 4G CAT-1/CAT-4 communication. Designed for remote monitoring of tanks, rivers, sumps, and industrial vessels, it eliminates the need for on-site wiring or separate RTUs. Data is transmitted directly to your cloud platform or SCADA system via cellular networks.
Key Features
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80GHz High-Frequency Radar – Beam angle as narrow as 3°, immune to dust, steam, or condensation.
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Integrated 4G Module – Supports MQTT, HTTP, or TCP/IP protocols; compatible with major cloud platforms (Aliyun, AWS, ThingsBoard).
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Wireless & Battery-Powered – Built-in rechargeable lithium battery (3.6V/19Ah) with low-power design; lasts up to 3–5 years under 1 measurement/hour.
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Bluetooth Local Configuration – Use mobile app for setup, diagnostic, and firmware upgrade without opening the housing.
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IP68 / Ex ia IIC T6 – Suitable for hazardous areas (optional) and fully submersible for manhole or flood monitoring.
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Real-Time Alerts – Configurable high/low level alarms via SMS or push notification.
Technical Specifications
| Parameter | Value |
|---|---|
| Measuring range | 0.1 – 30 m (standard) / up to 120 m (optional) |
| Accuracy | ±1 mm |
| Blind spot | < 50 mm |
| Frequency | 80 GHz (FMCW) |
| Beam angle | 3° (~0.5 m beam diameter at 10 m) |
| Communication | 4G LTE (Cat-1 or Cat-4), 2G fallback (optional) |
| Protocols | MQTT, Modbus RTU (over TCP), JSON, CoAP |
| SIM card | Standard nano-SIM (2FF) |
| Power supply | 3.6 V Li-SOCl₂ battery or external 12–24 VDC |
| Battery life | Up to 5 years (1 measurement/hour, power-saving mode) |
| Enclosure material | PTFE antenna + 304SS / 316L / PVDF housing |
| Protection rating | IP68 (submersible) / IP66 |
| Process temperature | -40°C to +85°C |
| Process pressure | -0.1 to 1.6 MPa |
| Output options | 4G data only, plus optional 4–20 mA loop (wired version) |
| Certification | CE, FCC, Ex ia IIC T6 Ga (ATEX/IECEx optional) |
Why Choose This Wireless Level Meter?
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Save Infrastructure Cost – No trenching, no cables, no solar panel or external RTU required.
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Rapid Deployment – Install in minutes using bracket or flange; configure via Bluetooth app.
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Reliable in Harsh Environments – Dust, vapor, foam, or low-dielectric media (e.g., plastic pellets, vegetable oil) do not affect measurement.
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Smart Data Management – Send data to your existing cloud dashboard; supports history trend, export, and remote calibration.
Typical Applications
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Water & Wastewater – Lift station wet wells, manhole level, river level monitoring.
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Oil & Gas – Crude oil tanks, diesel storage, frac tanks.
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Chemical – Acid or alkali storage (PVDF version).
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Agriculture – Irrigation reservoirs, grain silos.
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Mining – Slurry or sump level in open pits.








