# MacRay-WU4 Wi-Fi Ultrasonic Level Sensor Datasheet

URL: https://www.macnman.com/docs/product/wifi/sensors/level-sensors/macray-lorawan-ultrasonic-sensor-sub-four-meter-gen-one
Section: Datasheets › Wifi › Sensors › Level Sensors

# MacRay-WU4 Wi-Fi Ultrasonic Level Sensor Datasheet

## Product Overview

**MacRay-WU4** is a rugged **Wi‑Fi–based ultrasonic level sensor** designed for short‑range, high‑precision level monitoring (0–4 meters) of liquids and solids in industrial, commercial, and utility environments where reliable IP connectivity is available. Using advanced ultrasonic time‑of‑flight measurement and intelligent echo processing, it delivers accurate and repeatable level data even in challenging conditions such as turbulence, foam, and confined spaces.

Engineered with an **IP67‑rated sensor head**, corrosion‑resistant housing, and industrial‑grade electronics, MacRay-WU4 operates reliably in moisture‑rich, dusty, and chemically exposed environments. It is well suited for tanks, pits, manholes, sumps, reservoirs, wastewater chambers, and flood‑prone installations located within Wi‑Fi–covered premises.

The device transmits level data securely over standard **Wi‑Fi networks (2.4 GHz / 5 GHz)** directly to **on‑premise servers, dashboards, SCADA systems, or cloud platforms** using industry‑standard protocols such as **MQTT, HTTP, and HTTPS**, without the need for gateways or long‑range wireless infrastructure.

MacRay-WU4 supports **periodic, event‑based, and threshold‑based reporting**, along with **local BLE provisioning and diagnostics** via the Macnman Maya mobile application. Available in **battery‑operated and externally powered variants**, it enables flexible deployment for both fixed industrial installations and locations where wired connectivity is limited, delivering low‑latency, Wi‑Fi‑based level monitoring for modern Industrial IoT applications.

| ![MacRay-WU4 Wi-Fi ultrasonic level sensor front view](/img/lorawan/macray/macray-lu4-front-view.webp) | ![MacRay-WU4 Wi-Fi ultrasonic level sensor rear view](/img/lorawan/macray/macray-lu4-back-connector-view.webp) |
|--------------------------------|--------------------------------|
| ![MacRay-WU4 Wi-Fi ultrasonic level sensor installation view](/img/lorawan/macray/macray-lu4-installation-view.webp) | ![MacRay-WU4 Wi-Fi ultrasonic level sensor side view](/img/lorawan/macray/macray-lu4-side-view.webp) |

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## Download Center

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  <a href="/docs/downloads/macray-wu4-wifi-ultrasonic-level-sensor-datasheet.pdf" 
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    <div className="icon">📂</div>  
    <div>
      <strong>Download Datasheet</strong>
      <p>Download the PDF version of the datasheet.</p>
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  <a href="https://github.com/MacnMan/LoRa_Module_SDK/tree/main/SDK/LoRaWAN_AT_Slave" 
  className="icon-card">
    <div className="icon">📝</div>
    <div>
      <strong>Decoders</strong>
      <p>Click here to view the decoders for MacRay-WU4</p>
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  </a>
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## Key Features

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  <strong>Short‑Range Precision Sensing</strong>
  Optimized ultrasonic measurement for 0–4 meters liquid and solid level monitoring.
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  <strong>Advanced Echo Processing</strong>
  Intelligent filtering eliminates false readings from foam, turbulence, and obstructions.
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  <strong>Battery‑Powered LoRaWAN®</strong>
  Multi‑year autonomous operation with ultra‑low‑power wireless communication.
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  <strong>IP67 Rugged Design</strong>
  Durable and corrosion‑resistant enclosure built for harsh outdoor and underground environments.
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  <strong>Smart Uplink Strategies</strong>
  Periodic, event‑based & threshold alerts optimize power consumption and network traffic.
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  <strong>BLE Configuration via Maya App</strong>
  Quick setup, OTA parameter adjustment & diagnostics using a smartphone.
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  <strong>Wide Industrial Use</strong>
  Designed for manholes, sewer drains, tanks, pits, reservoirs & flood monitoring.
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  <strong>Secure & Long‑Range Communication</strong>
  AES‑128 encrypted LoRaWAN® connectivity with strong penetration in remote areas.
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  <strong>Flexible Deployment Options</strong>
  Supports pole, wall, and custom mount installation for easy field deployment.
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  <strong>Compatible with All LoRaWAN® Networks</strong>
  Works seamlessly with private/public network servers and cloud platforms.
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## Suited Applications

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    <strong>Industrial Tank Level Monitoring</strong>
    Accurate level measurement for water, chemicals, oils, and process liquids in industrial tanks located within Wi‑Fi‑enabled facilities.
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    <strong>Sumps, Pits & Utility Chambers</strong>
    Continuous monitoring of liquid levels in sumps, lift pits, pump rooms, and underground utility chambers to prevent overflow and equipment damage.
  </div>

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    <strong>Wastewater & Effluent Treatment Plants</strong>
    Reliable level monitoring for equalization tanks, aeration basins, sludge pits, and treatment chambers within plant premises.
  </div>

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    <strong>Water Storage & Distribution Systems</strong>
    Level tracking in overhead tanks, underground reservoirs, and buffer tanks for industrial and commercial water management.
  </div>

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    <strong>Flood & Basement Water Monitoring</strong>
    Early detection of rising water levels in basements, parking areas, and flood‑prone zones inside buildings and campuses.
  </div>

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    <strong>Industrial Process Automation</strong>
    Integrates with SCADA and local dashboards over Wi‑Fi for real‑time level data used in automated control and safety systems.
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    <strong>Commercial Buildings & Campuses</strong>
    Level monitoring for water tanks, rainwater harvesting systems, and drainage pits in offices, hospitals, malls, and campuses.
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    <strong>Smart Factories & On‑Premise IoT</strong>
    Enables low‑latency level monitoring within factories and plants using direct Wi‑Fi connectivity and IP‑based protocols.
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## Technical Specifications
<div className="spec-block">
  <div className="spec-block-title">
    General <br /> Specifications
  </div>
  <div className="spec-block-details">
    <p className="label">Part Order Number</p>
    <p className="value">MacRay-WU4</p>
    <br />
    <p className="label">Product Brand</p>
    <p className="value">Macnman Technologies Pvt Ltd</p>
  </div>
</div>

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<div className="spec-block">
  <div className="spec-block-title">
    Ultrasonic <br /> Level Measurement
  </div>
  <div className="spec-block-details">
<p className="label">Ranging Range</p>
<p className="value">3 – 450 cm</p>
<br />
<p className="label">Blind Zone Distance</p>
<p className="value">3 cm</p>
<br />
<p className="label">Response Time (Sensor)</p>
<p className="value">100 ms</p>
<br />
<p className="label">Resolution</p>
<p className="value">0.1 cm</p>
<br />
<p className="label">Center Frequency</p>
<p className="value">40 kHz ± 1 kHz</p>
<br />
<p className="label">Sensing Angle</p>
<p className="value">60°</p>
<br />
<p className="label">Protection Rating (Sensor)</p>
<p className="value">IP67</p>
  </div>
</div>

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<div className="spec-block">
  <div className="spec-block-title">
    Wireless <br /> Communication
  </div>
  <div className="spec-block-details">
    <p className="label">Wi‑Fi Standards</p>
    <p className="value">IEEE 802.11 b/g/n/ac</p>
    <br />

    <p className="label">Frequency Bands</p>
    <p className="value">2.4 GHz & 5 GHz (Dual‑Band)</p>
    <br />

    <p className="label">Operating Modes</p>
    <p className="value">Station Mode (Client)</p>
    <p className="value">Access Point Mode (Configuration)</p>
    <br />

    <p className="label">Network Protocols</p>
    <p className="value"> MQTT, HTTP, HTTPS</p>
    <br />

    <p className="label">Security</p>
    <p className="value">WPA2‑PSK / WPA3</p>
    <p className="value">TLS / SSL Encrypted Communication</p>
    <br />

    <p className="label">IP Configuration</p>
    <p className="value">DHCP / Static IP</p>
    <br />

    <p className="label">Typical Indoor Range</p>
    <p className="value">Up to 100 m (environment dependent)</p>
    <br />
  </div>
</div>

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<div className="spec-block">
  <div className="spec-block-title">
    LED <br /> Status
  </div>
  <div className="spec-block-details">
    <p className="label">LED Type</p>
    <p className="value">1 Internal Multi-Color LED</p>
    <br />
    <p className="label">Solid Blue</p>
    <p className="value">Device is connected with Maya App</p>
    <br />
    <p className="label">Flashing Blue</p>
    <p className="value">OTA (Over-the-Air) update in progress</p>
    <br />
    <p className="label">Slow Blinking Green</p>
    <p className="value">Attempting to connect to the network</p>    
    <br />
    <p className="label">Single Red Blink</p>
    <p className="value">A confirmed parameter of MacSync is being modified</p>
    <br />

  </div>
</div>

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<div className="spec-block">
  <div className="spec-block-title">
    Device <br /> Configuration
  </div>
  <div className="spec-block-details">
    <p className="label">Configuration</p>
    <p className="value">Via Macnman Maya Android App</p>
    <br />
    <p className="label">Uplink Modes</p>
    <p className="value">Time Based / Threshold Based / Sampling Based</p>
    <br />
    <p className="label">Stored Records*</p>
    <p className="value">30,000 Records</p>
    <br />
    <p className="label">Remote Configuration</p>
    <p className="value">JSON Format Data - from server</p>    
    <br />
  </div>
</div>

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<div className="spec-block">
  <div className="spec-block-title">
    Supported <br /> Cloud & Platforms
  </div>
  <div className="spec-block-details">
    <p className="label">Deployment Models</p>
    <p className="value">On-Premise Servers</p>
    <p className="value">Private Cloud Deployments</p>
    <p className="value">Public Cloud Platforms</p>
    <br />

    <p className="label">IoT Cloud Platforms</p>
    <p className="value">AWS IoT Core</p>
    <p className="value">Microsoft Azure IoT Hub</p>
    <p className="value">Google Cloud (via MQTT / HTTPS)</p>
    <p className="value">Custom IoT Platforms</p>
    <br />

    <p className="label">Integration Methods</p>
    <p className="value">MQTT Brokers</p>
    <p className="value">REST / HTTPS APIs</p>
    <p className="value">Webhooks</p>
    <br />

    <p className="label">Enterprise Systems</p>
    <p className="value">SCADA Systems</p>
    <p className="value">BMS / IBMS Platforms</p>
    <p className="value">Data Lakes & Analytics Engines</p>
  </div>
</div>

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<div className="spec-block">
  <div className="spec-block-title">
    Physical <br /> Characteristics
  </div>
  <div className="spec-block-details">
    <p className="label">Power Supply</p>
    <p className="value">9-36 V DC</p>
    <br />
    <p className="label">Operating Temperature</p>
    <p className="value">-40°C to +80°C</p>
    <br />
    <p className="label">Humidity Range</p>
    <p className="value">0% to 100% RH (non-condensing)</p>
    <br />
    <p className="label">Ingress Protection</p>
    <p className="value">IP65 standard (IP67 optional variant)</p>    
    <br />
    <p className="label">Housing Material</p>
    <p className="value">Glass field Nylon</p>    
    <br />
    <p className="label">Color</p>
    <p className="value">Matte White</p>    
    <br />
    <p className="label">Weight</p>
    <p className="value">~110g</p>    
    <br />
    <p className="label">Mounting Options</p>
    <p className="value">Pole Mounting / Wall Mounting</p>    
    <br />
  </div>
</div>

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<div className="spec-block">
  <div className="spec-block-title">
    Electrical <br /> Characteristics
  </div>
  <div className="spec-block-details">
    <p className="label">Input Voltage Range</p>
    <p className="value">9-36 V DC (External Supply)</p>
    <br />
    <p className="label">Power Consumption</p>
    <p className="value">~100 µA in sleep mode</p>
    <p className="value">~150 mA during transmission</p>
    <br />
    <p className="label">Input Impedance</p>
    <p className="value">>10 MΩ for voltage inputs</p>
    <br />
  </div>
</div>

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<div className="spec-block">
  <div className="spec-block-title">
    Communication <br /> Options
  </div>
  <div className="spec-block-details">
    <p className="label">BLE Connectivity</p>
    <p className="value">For local configuration and diagnostics via Maya App</p>
    <br />
    <p className="label">Cloud Protocols</p>
    <p className="value">MQTT / HTTPS </p>
    <br />
    <p className="label">Serial Interface</p>
    <p className="value">RS485 Modbus RTU support (optional)</p>
    <br />
  </div>
</div>

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<div className="spec-block">
  <div className="spec-block-title">
    Certifications & <br /> Compliance
  </div>
  <div className="spec-block-details">
    <p className="label">WPC</p>
    <p className="value">Compliant</p>
    <br />
    <p className="label">RoHS</p>
    <p className="value">Conforms to RoHS directive</p>
    <br />
  </div>
</div>

<div class="faint-line"></div>

<div className="spec-block">
  <div className="spec-block-title">
    Security & <br /> Encryption
  </div>
  <div className="spec-block-details">
    <p className="label">Data Encryption</p>
    <p className="value">AES-256 end-to-end encryption</p>
    <br />
    <p className="label">Authentication</p>
    <p className="value">OTAA activation modes</p>
    <br />
    <p className="label">Firmware Protection</p>
    <p className="value">Secure boot and signed OTA updates</p>
    <br />
  </div>
</div>

## MacRay-WU4 Variants
<table className="parameter-table">
  <thead>
    <tr>
      <th>Variant Name</th>
      <th>Power Source</th>
      <th>Battery Capacity</th>
      <th>Solar Support</th>
      <th>External Flash</th>
      <th>Ideal For</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>MacRay-WU4-PO</td>
      <td>12–24 V (Power)</td>
      <td>✖️</td>
      <td>✖️</td>
      <td>✔️</td>
      <td>Industrial or commercial sites with stable power supply</td>
    </tr>
    <tr>
      <td>MacRay-WU4-BO</td>
      <td>Battery</td>
      <td>12 Ah</td>
      <td>✖️</td>
      <td>✔️</td>
      <td>Remote or portable deployments with low power</td>
    </tr>
  </tbody>
</table>

<!-- 
<table className="spec-table">
  <thead>
    <tr>
      <th colSpan="2" className="spec-title">Wireless Transmission</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Technology</td>
      <td>LoRaWAN® (v1.0.4), Macnman MacTalk Protocol</td>
    </tr>
    <tr>
      <td>Antenna</td>
      <td>Internal high-efficiency antenna</td>
    </tr>
    <tr>
      <td>Supported Bands</td>
      <td>IN865 / RU864 / EU868 / US915 / AU915 / KR920 / AS923-1/2/3/4</td>
    </tr>
    <tr>
      <td>Tx Power</td>
      <td>16 dBm @ 868 MHz &nbsp;&nbsp; 20 dBm @ 915 MHz &nbsp;&nbsp; 19 dBm @ 470 MHz</td>
    </tr>
    <tr>
      <td>Sensitivity</td>
      <td>-137 dBm @ 300 bps</td>
    </tr>
    <tr>
      <td>Activation</td>
      <td>OTAA / ABP</td>
    </tr>
    <tr>
      <td>LoRaWAN® Class</td>
      <td>Class A (default), Configurable to Class C via Maya</td>
    </tr>
  </tbody>
</table>

-->

## What's in the Box?
Make sure box contains following items before installations

![What's in the box: MacRay-WU4 package contents](/img/lorawan/macray/macray-lorawan-what-is-in-the-box.svg)

**Accessories must be purchased separately & may :**
not be included in the box.

## MacRay-WU4 Dimensions
![MacRay-WU4 dimensions drawing](/img/lorawan/macray/macray-lu-four-dimensions.svg)

## Frequently Asked Questions

### What is the MacRay-WU4 used for?

MacRay-WU4 is a rugged Wi-Fi ultrasonic level sensor for short-range, high-precision (0-4 m) non-contact level monitoring of liquids and solids. Typical applications include Industrial Tank Level Monitoring, Sumps, Pits & Utility Chambers, Wastewater & Effluent Treatment Plants, Water Storage & Distribution Systems, Flood & Basement Water Monitoring and Industrial Process Automation.

### What does the MacRay-WU4 measure, and how accurately?

Measurement specifications of the MacRay-WU4:

- Ultrasonic Level: range 3 – 450 cm, resolution 0.1 cm.

### How does the MacRay-WU4 connect and send data over Wi-Fi?

The MacRay-WU4 connects over IEEE 802.11 b/g/n/ac Wi-Fi on 2.4 GHz & 5 GHz (Dual‑Band). Security: WPA2‑PSK / WPA3, TLS / SSL Encrypted Communication. IP configuration: DHCP / Static IP. It sends data using MQTT, HTTP, HTTPS. Typical indoor range is up to 100 m (environment dependent).

### How is the MacRay-WU4 powered?

The MacRay-WU4 is powered from 9-36 V DC (External Supply).

### What is the IP rating and operating temperature of the MacRay-WU4?

The MacRay-WU4 has an ingress protection rating of IP65 standard (IP67 optional variant) and an operating temperature range of -40°C to +80°C. Operating humidity: 0% to 100% RH (non-condensing). Mounting options: Pole Mounting / Wall Mounting.

### How is the MacRay-WU4 configured?

The MacRay-WU4 is configured with the Macnman Maya Android app. Supported uplink modes: Time Based / Threshold Based / Sampling Based. It can also be configured remotely with JSON data sent from the server.

### Which cloud platforms does the MacRay-WU4 work with?

The MacRay-WU4 can send data to platforms including AWS IoT Core, Microsoft Azure IoT Hub, Google Cloud (via MQTT / HTTPS), Custom IoT Platforms. Deployment models: On-Premise Servers, Private Cloud Deployments, Public Cloud Platforms. Integration methods: MQTT Brokers, REST / HTTPS APIs, Webhooks.

## Related Products and Resources

- Related datasheets: [MacRay LUS X1 LoRaWAN ultrasonic level sensor](/product/lorawan/sensors/level-sensors/macray-lorawan-ultrasonic-sensor-sub-four-meter-gen-one), [MacRay-ToF-WXx Wi-Fi Time-of-Flight sensor](/product/wifi/sensors/level-sensors/macray-tof-x-series)
- Help: [Warranty terms and conditions](/help/macnman-standard-warranty-terms-and-conditions) and [contact Macnman support](/help/help)