Non-Contact Level Sensor WS-03A | Liquid & Powder Detection
Non-Contact Level Sensor WS-03A | Liquid & Powder Detection
HpLive WS-03A Non-Contact Level Sensor — Detect Levels Without Touching the Container
The HpLive WS-03A Non-Contact Level Detection Sensor lets you monitor liquid, powder, and granular material levels from outside the container — no drilling, no probes, no direct contact required. Simply attach it to the exterior wall of any non-metallic vessel (plastic, glass, ceramic) and it accurately detects the material level inside. Ideal for DIY automation projects, aquariums, water tanks, chemical storage containers, grain bins, and more.
Key Features
- True Non-Contact Detection: Senses material levels through non-metallic container walls (up to 10 mm sensing distance) — no penetration of the vessel needed.
- Works on Liquids, Powders & Granules: Suitable for water, oils, chemicals, fine powders, and granular materials in household and industrial settings.
- Wide Voltage Compatibility: Operates on 5 V to 24 V DC, making it easy to integrate with Arduino, Raspberry Pi, PLCs, and other common control systems.
- High Output Current: Up to 30 mA output current ensures reliable signal transmission to downstream controllers and relays.
- Durable PVC Construction: Lightweight white PVC housing stands up to everyday handling and typical installation environments.
- Easy Mounting: Attach externally to any flat, non-metallic surface — no modifications to the container required.
Specifications
| Model | WS-03A |
| Material | PVC |
| Color | White |
| Supply Voltage | 5 V – 24 V DC |
| Max. Output Current | 30 mA |
| Sensing Distance | Up to 10 mm (through non-metallic walls) |
| Detection Targets | Liquids, powders, granular materials |
| Country of Origin | Made in Mainland China |
Package Contents
- 1 × WS-03A Non-Contact Level Sensor
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Frequently Asked Questions
Q: What types of containers work with the WS-03A non-contact level sensor?
A: The WS-03A is designed to work through non-metallic container walls such as plastic, glass, and ceramic. Metal containers will block the sensor's signal, so it is not suitable for use on metal vessels. The container wall thickness should be within the 10 mm sensing range for reliable detection.
Q: Can the WS-03A non-contact level sensor be used with an Arduino or Raspberry Pi?
A: Yes! The sensor's wide 5 V–24 V DC supply range and 30 mA output current make it directly compatible with Arduino, Raspberry Pi, and most PLCs or microcontroller development boards. Simply connect the output signal wire to a digital input pin on your controller.
Q: Is this sensor only for detecting water, or can it detect other materials?
A: The WS-03A non-contact level sensor is versatile — it can detect liquids (water, oils, chemicals), fine powders, and granular materials through the container wall, making it useful in a wide range of household automation and light industrial monitoring applications.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.