This wireless ultrasonic liquid level sensor is a high-precision monitoring solution that utilizes sound waves to measure distance. Unlike traditional float switches, it requires no physical contact with the liquid, making it ideal for corrosive or dirty fluids. The sensor connects via Wi-Fi to your home or industrial network, allowing you to set custom alarms for "High Level" (overflow prevention) and "Low Level" (pump protection). It supports multi-tank monitoring, meaning you can manage Tank A, Tank B, and Tank C all from a single dashboard on your phone.
Product Features
Non-Contact Measurement: Ensures safety and longevity by keeping the sensor dry and away from the liquid.
Smart App Control: Fully compatible with Tuya Smart and Smart Life Apps (iOS & Android).
Wide Detection Range: Capable of measuring heights from 0.1m to 2.9m, suitable for most residential and industrial tanks.
Dual Alarm System: customizable notifications for both high-level overflow and low-level shortages.
Working Principle
The Ultrasonic Fluid Level Sensor operates on the time-of-flight principle.
The sensor emits high-frequency ultrasonic pulses downwards towards the liquid surface.
These sound waves hit the liquid surface and reflect back to the sensor's receiver.
The internal microprocessor calculates the time difference between transmission and reception.
Using the speed of sound, it converts this time into a precise distance measurement, which is then displayed as a liquid level percentage or depth in the App.
Product Parameters
|
Parameter Item |
Technical Specification |
|
Product Model |
US-3W201 |
|
Detection Range |
0.1m - 3m |
|
Power Supply Voltage |
5V DC |
|
Output Signal |
Standard 4-20mA Analog Signal |
|
Monitoring Method |
WiFi + Tuya APP Remote Real-time Monitoring |
|
Measurement Principle |
Ultrasonic Non-contact Ranging |
|
Working Temperature |
-20℃ ~ +60℃ |
|
Signal Transmission Distance |
Long-distance stable transmission (4-20mA wired + WiFi wireless) |
|
Applicable Medium |
Conventional industrial liquids (water, oil, and other non-viscous clean liquids) |
Application Fields
【Ultimate Versatility! Perfect for Any Scenario】
This multi-functional liquid level sensor is incredibly versatile, perfectly meeting your diverse needs:
🏠 Residential: Home water tanks, rainwater harvesting systems, and basement sump pits.
🌾 Agriculture: Irrigation water tanks, livestock watering troughs, and fertilizer mixing tanks.
🏭 Industrial: Chemical storage tanks, oil barrels, and wastewater treatment plants.
☕ Commercial Equipment: Coffee machines, humidifiers, and beverage dispensers.
Installation Method
The US-3W201 ultrasonic level sensor adopts a simple top-mounted fixed installation method, which is convenient and fast without complicated wiring and construction. First, select a flat and unobstructed installation position on the top of the measured tank or pool to ensure the sensor probe is vertically downward, avoiding ultrasonic signal occlusion caused by internal obstacles, liquid bubbles and splashes. Then fix the sensor with matching mounting accessories to ensure firm installation and no shaking. Complete the 5V power supply wiring and 4-20mA signal wiring according to the wiring instructions, and connect the device to the Tuya APP via WiFi. The whole installation process is simple, no professional debugging is required, and it can be put into use quickly, supporting fixed installation for long-term monitoring and temporary mobile monitoring in industrial scenarios.
Customizable Options
We understand that every business has unique needs. We offer flexible customization services:
Private Labeling: We can print your logo on the sensor housing and packaging.
Frequency Adjustment: Tuning the ultrasonic frequency for specific liquid types (e.g., foam-heavy liquids).
Packaging: Custom retail boxes or bulk industrial packaging.
MOQ: Flexible Minimum Order Quantities for trial orders
Why Choose Us
Reliable Product Quality: Focus on level sensor manufacturing for years, with mature production technology and strict quality inspection process. The US-3W201 sensor features stable operation, strong anti-interference ability and long service life, reducing customer equipment replacement and maintenance costs.
Intelligent & Practical Product Design: Integrate industrial standard 4-20mA output and Tuya APP intelligent remote monitoring, combining traditional industrial compatibility with modern intelligent management, which is more in line with the intelligent upgrading demand of modern industrial production.
Flexible Customization Service: Break the limitation of standardized products, provide targeted customized services for different industrial working conditions, and solve the problem that universal sensors are not applicable to special scenarios.
Professional After-sales Support: Provide 24-hour technical consultation, installation guidance and after-sales maintenance services, quickly respond to customer problems, ensure normal and stable operation of customer equipment, and create long-term stable cooperative value for customers.
FAQ
Q1: Can this sensor measure hot water?
A: Yes, but please ensure the temperature does not exceed the sensor's rated limit (typically around 60°C-80°C for standard models). For extremely high temperatures, please consult us for a specialized probe.
Q2: Does it work with 5GHz Wi-Fi?
A: Most IoT sensors operate on the 2.4GHz Wi-Fi band. Please ensure your router broadcasts a 2.4GHz signal for the initial setup.
Q3: How do I calibrate the "Full" and "Empty" levels?
A: You can easily set the "Installation Height" (distance from sensor to bottom) and the "Full Line" distance directly within the Tuya/Smart Life App settings.
Q4: What happens if the Wi-Fi disconnects?
A: The sensor will continue to measure locally. Once the Wi-Fi reconnects, it will upload the latest data. The alarm function relies on the cloud, so internet connectivity is required for push notifications.
Q5: Can I use this for fuel or oil?
A: Yes, since it is a non-contact ultrasonic sensor, it is safe for use with oil and fuels, provided the fumes are within safe operating limits for the electronics.
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