Wireless Level Monitoring System

Traditional level gauges rely on complex wiring (such as RS485 and cable trays—when deployed in large-scale settings such as warehousing and logistics—result in lengthy installation cycles and high costs. Mechanical components are prone to aging, requiring frequent calibration or replacement, which sharply drives up maintenance expenses. For instance, a large grain silo may necessitate the deployment of hundreds of monitoring points, yet conventional solutions struggle to achieve efficient network formation and real-time data synchronization. In contrast, wireless level‑monitoring systems support multi‑mode communication via LoRa, 4G, and Wi‑Fi, enabling wide‑area coverage without wiring. Coupled with low‑power designs—such as LoRaWAN—they extend device lifetimes and substantially reduce both deployment and operational costs. Moreover, traditional systems lack cloud‑based data integration, making it difficult to support intelligent decision‑making, whereas wireless platforms can analyze multi‑node data in real time and trigger linked alarm terminals for rapid response.

1. system Unified function

   This system is a platform based on A high-precision wireless level‑monitoring solution based on 60 GHz millimeter‑wave radar, suitable for real‑time distance measurement and level control of liquids, granular materials, powders, and other substances. The system employs multi‑mode wireless communication via LoRa, LoRaWAN, Wi‑Fi, and CAT‑1, supports local alarm display and cloud‑based data management, and enables users to achieve remote, low‑power, highly reliable level monitoring. Its block diagram is shown below:

 

2. Product Introduction

Front-end sensor

1. 60 GHz millimeter-wave level transmitter

• Product Features

The radar level gauge product series refers to instruments operating at A 60 GHz frequency-modulated continuous-wave (FMCW) radar product. The device boasts a maximum range of up to 15 meters, with a blind zone of less than 10 cm. Thanks to its higher operating frequency and wider bandwidth, it delivers superior measurement accuracy. The product includes a mounting bracket, eliminating the need for on-site wiring and ensuring quick and easy installation.

• Product image

• Product Specifications

Project	Parameter	Note
Transmission frequency	60 GHz
Measurement range	0.1 m ~14m
Measurement accuracy	±1mm
Beam angle	6°
Scope of Power Supply	9~36 VDC
Communication method	RS485
Operating temperature	-40~85℃
Antenna Type	Lens antenna
Recommended Cables	0.35mm²
Protection rating	IP67
Installation method	Bracket /Thread
Data transmission method	RS485/LoRa/LoRaWAN/Cat1(4G)	Default Support RS485

2. Wireless Gateway

• Feature Introduction

A LoRaWAN gateway is an IoT‑grade gateway router based on the low‑power, wide‑area LoRaWAN protocol. It provides IoT devices with low‑power, mobile, and secure local two‑way wireless communication, supporting multiple wireless connectivity options including LoRa, 2G/3G/4G/5G, and Wi‑Fi. The LoRaWAN gateway employs a star‑topology architecture: front‑end node devices connect directly—via a single hop—to one or multiple LoRaWAN gateways, enabling wireless communication between end devices and cloud servers, or alternatively, connecting to the cloud via standard IP. It is widely deployed in smart cities, smart communities, smart campuses, smart oilfields, smart tobacco industries, and more.

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• Product Specifications

Project		Parameter	Note
Product Functions	L NOW Functionality	Supports standard It RaWAN Agreement
		L oRa Untrusted communication has eight uplink channels and one downlink channel.
	Mobile wireless functionality	Support W IFI Hotspot Feature
		L TE Supports three mode options: domestic, European, and U.S.; domestically, it supports all network bands.
		Supports Ethernet and 3G/4G/5G Upstream and downstream data backhaul, with automatic switching support.
	System Functions	Supports overseas T TN Server
		Supports Chinese /English interface switching and local time setting
		Supports remote administrator login for maintenance and troubleshooting.
		Support M QTT , support W EB Interface Management
		Supports key presses or W EB Restore factory settings
Wireless Performance	L NOW Wireless channel line	8 channels
	Work mode	Full-duplex /Half-duplex
	It Ra Communication rate	292 b ps~5.4K b P.S.
	Maximum transmit power	27 database m
	Maximum receiving sensitivity	-141 d bm(SF=12)
	Operating frequency band	China      470MHZ Australia  923MHZ United States      915MHZ Europe      868MHZ	Defaults to 4 70 MHz, Customization is required for different frequency bands.
	Data Upload	10/100M Ethernet and 3G/4G/5G	Not supported by default. 5 G
L TE Standardization	Domestic 4 G Supported frequency bands	LTE-TDD: B38/B39/B40/B41 LTE-FDD: B1/B3/B5/B7/B8 TD-SCDMA: B34/B39 UMTS: B1/8 EVDO: 800 MHz CDMA1x: 800 MHz GSM: 850/900/1800/1900
	Europe 4 G Supported frequency bands	F DD LTE :B1/B3/B5/B8/B20 T DD LTE: B38/B40/B41 W CDMA:B1/B5/B8 G SM ： B3/B8
	United States 4 G Supported frequency bands	F DD LTE: B2/B4/B12 W CDMA LTE: B2/B4/B5
	W IFI	Support 802.11a/b/g/n Agreement, 2.4G Frequency band
	Ethernet	Support 10M/100M Adaptive Network Communication
Product Specifications	Operating temperature	-30 °C ~65 °C
	Operating temperature	5 %RH~90%RH
	Authentication	C E/FCC
	Power supply	D C Power supply, voltage is 6 V~12V

 

 

3. Alarm terminal

• Product Features

The alarm terminal enables unified management of multiple channels of sensors. It can simultaneously display data from several sensor channels on the screen and store, transmit, and analyze the collected sensor data. The alarm terminal can via… I/O and RS485 interfaces enable integration with external control devices, such as sprinklers, fans, humidifiers, and more.

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• Product Specifications

      

Project		Parameter	Note
Display function	Display types	TFT true color
	Display resolution	1024X600
	Types of touch controls	High-precision capacitive touchscreen
	Sensor display count	Supports multiple display modes; you can display one in full-screen, or… 2, with a maximum of 16 displayed simultaneously.
	Display size	10.1 inches
System Functions	Real-time data	It can display sensor data in real time on the screen in multiple formats.
	Historical data	It can store historical data for more than one year and allows you to easily display this data on the touchscreen.
	Control method	You can directly manipulate the screen with your hands to zoom in and out.
	Supported sensor types	Supports temperature and humidity, temperature, Data from multiple sensors, including PM2.5/PM10, TVOC, formaldehyde, CO2, and others.
	Data Upload	10/100M Ethernet and 3G/4G/5G	Not supported by default. 5G
	Communication protocol	Local support LORA, LORAWAN integration with sensors, Remote support MQTT connects to the cloud platform.
	Local Wireless	Support LORA wireless communication, with a frequency range of 31 MHz to 915 MHz.	Wireless communication is an optional accessory; the default frequency band is 470MHZ
Product Specifications	Operating temperature	-30℃~65℃
	Operating humidity	5%RH~90%RH
	Authentication	CE/FCC
	Power supply	6V~12V

4. Wireless Level Gauge Monitoring Platform

 

• Platform Features

This system platform is an intelligent management hub specifically designed for level measurement, integrating data storage, analytics, visualization, device management, and alarm integration. It supports access via multiple IoT standard protocols, offers a comprehensive user‑permission management framework, and enables end-to-end digital and intelligent management of the entire level‑monitoring process.

• Platform image

 

Application areas

 

Radar Wireless Level Monitoring System – Selected by Hengyi Technology

HE-60G Millimeter-Wave Radar Level Meter: 60 GHz high frequency, ±1 mm accuracy, 0.1–14 m measurement range, IP67 protection, suitable for dusty and high-temperature environments.

HE-GW100 Wireless Gateway: Supports dual-mode LoRaWAN and 4G communication, 8 concurrent channels, and operates reliably at temperatures as low as -40°C, enabling industrial-grade networking.

HE-AT80 Alarm Terminal: 10.1-inch touchscreen, 16-channel sensor management, direct MQTT cloud connectivity, and real-time alerts for peace of mind.

 

1. Level Monitoring of Silos in Feed and Flour Mills

At feed mills, powdered materials such as flour exhibit high flowability and tend to pile up or form sloping surfaces, making traditional mechanical level instruments—such as weighted‑pendulum or capacitive types—prone to being affected by the material’s properties. Millimeter‑wave level sensors, by contrast, employ non‑contact measurement using high‑frequency electromagnetic waves and feature a narrow beam angle (particularly… At 80 GHz, the beamwidth can be as narrow as 3°, enabling precise signal reflection and accurate detection even on uneven material surfaces. 。

In feed mills, the flour-processing environment features extremely high dust concentrations, which can cause ultrasonic or laser level sensors to fail due to dust scattering. Millimeter-wave sensors, with their strong penetration capability, are unaffected by dust, steam, and temperature fluctuations and require no cleaning or maintenance, making them well-suited for harsh operating conditions.

Flour used in feed mills must meet food hygiene standards. Millimeter-wave level sensors do not come into contact with the material, thereby eliminating the risk of mechanical wear or contamination, and comply with… FDA, EHEDG, and other food industry standards.

Thanks to its high precision, strong anti‑interference capabilities, and hygienic safety, the millimeter‑wave level transmitter has become the optimal solution for level measurement in flour‑mill silos, significantly boosting production efficiency and automation while reducing maintenance costs.

2. River water level monitoring

In river‑water‑level monitoring, millimeter‑wave water level gauges (radar water level gauges) offer significant advantages over conventional measurement methods—such as float‑type, ultrasonic, and pressure‑based sensors—and are particularly well suited for long‑term, stable monitoring in complex natural environments.

Unaffected by surface debris: Float-type water level gauges are prone to entanglement with aquatic vegetation and trash, whereas millimeter-wave sensors measure water levels via electromagnetic wave reflection, completely eliminating the need for physical contact.

Adapting to swift currents or waves: high-frequency millimeter waves (such as At 80 GHz, the beamwidth is narrow—down to 3°—enabling precise focusing on a specific point on the water surface, thereby reducing signal fluctuations caused by waves and enhancing data stability.

Unaffected by surface debris: Float-type water level gauges are prone to entanglement with aquatic vegetation and trash, whereas millimeter-wave sensors measure water levels via electromagnetic wave reflection, completely eliminating the need for physical contact.

Adapting to swift currents or waves: high-frequency millimeter waves (such as At 80 GHz, the beamwidth is narrow—down to 3°—enabling precise focusing on a specific point on the water surface, thereby reducing signal fluctuations caused by waves and enhancing data stability.

Millimeter-level accuracy: high-frequency radar (such as At 80 GHz, the wavelength is shorter, enabling a resolution of up to ±1 mm, thereby meeting the high-precision requirements of hydrological monitoring (e.g., flood forecasting).

Ultra-wide measurement range: covers a broad measurement span. 0.3–100 meters, suitable for monitoring shallow rivers, deep reservoirs, or tidal water levels.

Thanks to its non-contact operation, high precision, strong anti-interference capabilities, and low maintenance requirements, millimeter-wave water level gauges have become an ideal choice for modern hydrological monitoring. They are particularly well suited for harsh environments and applications demanding high reliability, providing continuous, dependable data to support flood control and water resource management.

 

3. In-cylinder Liquid Position monitoring

 

In the industrial sector, many liquid tanks like the one mentioned above require real-time monitoring of their internal liquid levels. Millimeter-wave radar sensors enable non-contact measurement, Zero pollution, fast and convenient, Applicable scenarios: Monitoring of closed vessels in industries such as chemical processing and food manufacturing. ， It allows for convenient monitoring of the liquid level inside the tank.

The wireless level monitoring system is based on   60 GHz millimeter-wave radar technology As the core, through Non-contact high-precision measurement ( ±1mm) and Multi-mode wireless communication ( LoRa/4G/WiFi) It seamlessly adapts to complex environments—such as dust‑filled industrial silos, river‑water level measurements affected by aquatic vegetation, and tightly sealed, high‑risk liquid storage tanks—enabling all‑weather, low‑maintenance level monitoring. From boosting production efficiency to ensuring public safety, this system leverages cutting‑edge technology to drive level measurement toward an intelligent, highly efficient future.