IP68 Photoelectric Liquid Level Sensor – ±1mm High Precision
IP68 Photoelectric Liquid Level Sensor – ±1mm High Precision
IP68 Photoelectric Liquid Level Sensor — High-Precision Water Level Detection
Keep your humidifier, water tank, dispenser, or custom electronics project running safely with this compact Photoelectric Liquid Level Sensor. Using non-contact optical detection technology, this probe accurately reads liquid levels to within ±1 mm — all without any moving parts or mechanical contacts that can wear out over time. Whether you need a low-water alert or a full-tank reminder, this sensor delivers reliable, real-time feedback in a tiny, rugged package.
Key Features
- IP68 Waterproof Rating: The probe is fully sealed and submersible, making it safe for continuous liquid exposure.
- High Precision: ±1 mm detection accuracy for dependable level monitoring.
- Wide Operating Voltage: Runs on 4.5 V – 5.5 V, compatible with standard 5 V microcontroller projects and appliance circuits.
- Integrated Anti-Shake A/D Conversion Circuit: Built-in filtering eliminates false readings caused by vibration or electrical noise.
- Ultra-Low Standby Power Consumption: Keeps energy draw minimal when not actively detecting.
- Dual Alert Functions: Supports both water-shortage and full-water reminder outputs.
- Compact & Cost-Effective: Small form factor fits easily inside tight enclosures.
- No Battery Required: Powered directly through your circuit — no separate battery needed.
Typical Applications
- Humidifiers & air washers
- Water dispensers & drinking water tanks
- Hand sanitizer dispensers
- Liquid leakage alarm systems
- DIY electronics & IoT projects requiring liquid detection
- Medical and laboratory equipment requiring non-contact liquid sensing
Specifications
| Operating Voltage | 4.5 V – 5.5 V |
| Detection Accuracy | ±1 mm |
| Waterproof Rating | IP68 |
| Circuit | Integrated filtering & anti-shake A/D conversion |
| Power Mode | External supply (no battery) |
| Country of Origin | Made in China |
What's in the Box
- 1× Photoelectric Liquid Level Sensor Probe
Notes
Due to lighting and screen color differences, the actual product color may vary slightly from images. Please allow a 1 mm – 10 mm tolerance due to manual measurement.
For guidance on electrical safety standards for DIY and consumer electronic components, visit the U.S. Consumer Product Safety Commission (CPSC).
Frequently Asked Questions
Q: What types of liquids can the IP68 photoelectric liquid level sensor detect?
A: This photoelectric liquid level sensor is designed primarily for water-based liquids such as clean water, purified water in humidifiers, and water tanks. It uses optical (light-based) detection, so it works best with clear or lightly tinted liquids. Always verify compatibility with the specific liquid in your application before permanent installation.
Q: Does this water level sensor work with Arduino or Raspberry Pi?
A: Yes. The sensor operates at 4.5 V – 5.5 V, which matches the standard 5 V logic used by Arduino boards and many other microcontroller platforms. It outputs a digital signal that can be read directly by a GPIO pin, making integration into DIY electronics and IoT water-level monitoring projects straightforward.
Q: How is the IP68 rating relevant to this liquid level probe?
A: An IP68 rating means the probe is fully protected against dust and can be continuously submerged in water beyond 1 meter depth (per manufacturer specification). This makes the sensor suitable for placement inside water tanks, humidifier reservoirs, and similar enclosed liquid environments without risking damage to the probe itself.
Q: What is the difference between the water-shortage and full-water reminder functions?
A: The sensor provides two output states: a water-shortage signal when the liquid level drops below the detection threshold, and a full-water signal when the liquid level reaches or exceeds the set point. This allows your circuit or appliance to trigger separate alerts or automated actions — such as turning off a pump when the tank is full or sounding an alarm when water is low.