Non-contact: No contact with the liquid is required; it can detect conductive liquids through non-metallic containers. Installation is simple and easy, and it is not affected by container color. Does not affect water quality: Since it does not directly contact the liquid, it will not affect water quality or cause scale buildup. Automatic sensitivity adjustment: Sensitivity can be automatically adjusted with a single button. Ultra-thin size: Ultra-thin at 6.1mm, saving space. Specifications DC Input Voltage (VIN): DC 3.3V~5V Ripple and Noise Voltage: < 100MVP-P Output Method: NPN, High/Low Level Response Time: 500ms Operating Temperature: -20~105°C Environmental Certification: RoHS-2.0 Waterproof Rating: IP67 Current Consumption: 5mA±2mA Sensitivity Range: ≤15mm Output Current: ≤100mA Level Accuracy: ±3mm Humidity: ≤100% Material: PC-VO Fire-retardant Material Safety Standard Certification: CE Color: As Shown Package Contents: 1* Liquid level sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.