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Yunyi has engaged in the research and development of pressure, liquid level, flow, and temperature sensors and transmitters, as well as their solutions. Providing OEM & ODM and custom design services

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.

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Key Features

  • 80GHz High-Frequency Radar – Beam angle as narrow as 3°, immune to dust, steam, or condensation.

  • Integrated 4G Module – Supports MQTT, HTTP, or TCP/IP protocols; compatible with major cloud platforms (Aliyun, AWS, ThingsBoard).

  • 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.

  • Bluetooth Local Configuration – Use mobile app for setup, diagnostic, and firmware upgrade without opening the housing.

  • IP68 / Ex ia IIC T6 – Suitable for hazardous areas (optional) and fully submersible for manhole or flood monitoring.

  • Real-Time Alerts – Configurable high/low level alarms via SMS or push notification.

Technical Specifications

ParameterValue
Measuring range0.1 – 30 m (standard) / up to 120 m (optional)
Accuracy±1 mm
Blind spot< 50 mm
Frequency80 GHz (FMCW)
Beam angle3° (~0.5 m beam diameter at 10 m)
Communication4G LTE (Cat-1 or Cat-4), 2G fallback (optional)
ProtocolsMQTT, Modbus RTU (over TCP), JSON, CoAP
SIM cardStandard nano-SIM (2FF)
Power supply3.6 V Li-SOCl₂ battery or external 12–24 VDC
Battery lifeUp to 5 years (1 measurement/hour, power-saving mode)
Enclosure materialPTFE antenna + 304SS / 316L / PVDF housing
Protection ratingIP68 (submersible) / IP66
Process temperature-40°C to +85°C
Process pressure-0.1 to 1.6 MPa
Output options4G data only, plus optional 4–20 mA loop (wired version)
CertificationCE, FCC, Ex ia IIC T6 Ga (ATEX/IECEx optional)

Why Choose This Wireless Level Meter?

  1. Save Infrastructure Cost – No trenching, no cables, no solar panel or external RTU required.

  2. Rapid Deployment – Install in minutes using bracket or flange; configure via Bluetooth app.

  3. Reliable in Harsh Environments – Dust, vapor, foam, or low-dielectric media (e.g., plastic pellets, vegetable oil) do not affect measurement.

  4. Smart Data Management – Send data to your existing cloud dashboard; supports history trend, export, and remote calibration.

Typical Applications

  • Water & Wastewater – Lift station wet wells, manhole level, river level monitoring.

  • Oil & Gas – Crude oil tanks, diesel storage, frac tanks.

  • Chemical – Acid or alkali storage (PVDF version).

  • Agriculture – Irrigation reservoirs, grain silos.

  • Mining – Slurry or sump level in open pits.

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