The non-contact liquid level sensor utilizes advanced signal processing technology by using a powerful chip with high-speed operation capacity to achieve non-contact liquid level detection. No contact with liquid makes the module suitable for hazardous applications such as detecting toxic substances, strong acid, strong alkali and all kinds of liquid in an airtight container under high pressure. There are no special requirements for the liquid or container and the sensor is easy to use and easy to install. 

Pinout:

brown = 5-24V
blue = GND
yellow = OUT
black = MODE

MODE = connected to VCC or UNCONNECTED output is PNP (NO detection = output LOW, detection = output HIGH)

MODE = connected to GND output is NPN (NO detection = output HIGH, detection = output LOW)

Specs:

Operating Voltage (InVCC) : DC 5 ~ 24 v

Current consumption: 5 mA

Output voltage (high level) : InVCC

Output voltage (low level) : 0V

Output current: 1 ~ 50 mA

Response time: 500 ms

Operating Temperature : 0 ~ 105 ℃

Range for thickness of induction (sensitivity): 0 ~ 13 mm

Humidity: 5% ~ 100%

Material: ABS.

Waterproof performance: IP67

Dimension : 28 * 28 mm / 1.1 * 1.1 inches