FMCW radar level transmitter

for slurryfor corrosive liquidsfor water

Overview
The YUNYI 4G High-Frequency Wireless Liquid Level Meter is a non-contact FMCW radar level transmitter with integrated cellular telemetry. Combining an 80 GHz high-frequency radar sensor and a 4G LTE communication module, it is designed for remote monitoring of tanks, reservoirs, rivers and industrial vessels with direct cloud or SCADA connectivity.

Key Features

• 80 GHz High-Frequency Radar — Narrow 3° beam, resilient to dust, vapor, foam and condensation.
• Integrated 4G Module — Supports MQTT, HTTP, TCP/IP; compatible with major cloud platforms (Aliyun, AWS, ThingsBoard).
• Wireless & Battery-Powered — Built-in rechargeable Li battery (3.6 V / 19 Ah) and low-power firmware; up to 3–5 years at 1 measurement/hour.
• Bluetooth Local Configuration — Mobile app for commissioning, diagnostics and firmware updates without opening the enclosure.
• IP68 / Ex ia IIC T6 (optional) — Submersible protection rating and optional hazardous-area certification for manholes, flood or tank use.
• Real-Time Alerts — Configurable high/low level alarms via SMS or push notifications.

Benefits

• Reduced Infrastructure Cost — Eliminates trenching and cabling; no external RTU or solar panel required for typical deployments.
• Rapid Deployment — Simple bracket or flange mounting; configure via Bluetooth app.
• Reliable in Harsh Environments — Measurement unaffected by dust, vapor, foam or low-dielectric media.
• Smart Data Management — Direct cloud upload, historical trends, export and remote calibration supported.

Typical Applications

• Water & Wastewater — Wet wells, manhole level, river and flood monitoring.
• Oil & Gas — Storage tanks, diesel and crude monitoring.
• Chemical — Corrosive liquid storage (PVDF housing option).
• Agriculture — Irrigation reservoirs, grain silos.
• Mining — Sump and slurry level in pits and ponds.

Technical Specifications
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, optional 4–20 mA loop (wired version)
Certification — CE, FCC, Ex ia IIC T6 Ga (ATEX/IECEx optional)

Detailed Specifications

• 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, optional 4–20 mA loop (wired version)
• Certification: CE, FCC, Ex ia IIC T6 Ga (ATEX/IECEx optional)