YKC-Y23A Non-invasive Inductive Liquid Level Sensor - NPN

The non-contact liquid level sensor is suitable for the outer wall of non-metallic containers without direct contact with the liquid, and will not be corroded by corrosive liquids such as strong acids and alkalis, and will not be affected by scale or other sundries. The detection is accurate and stable, and can detect the boiling water level.

Pure electronic circuit structure, non-mechanical working mode, stable performance and long life. High stability, high sensitivity, strong anti-interference ability, free from external electromagnetic interference, special treatment for power frequency interference and common mode interference, to be compatible with 5V power adapters on the market.

Strong compatibility, penetrating various non-metallic containers, such as plastic, glass, ceramics and other containers, the sensing distance can reach 15mm; liquid, powder, and particles can be detected.

Working Principle:

The intelligent non-contact liquid level sensor uses the inductive capacitance of water to detect whether there is liquid. When there is no liquid close to the sensor, due to the existence of distributed capacitance on the sensor, there is a certain static capacitance between the sensor and the ground. When the liquid level slowly rises close to the sensor, the parasitic capacitance of the liquid will be coupled to this static capacitance, making the capacitance value of the sensor larger, and the changed capacitance signal is then input to the control IC for signal conversion.

The changing capacitance is converted into a change of some kind of electrical signal, and then a certain algorithm is used to detect and judge the degree of the change. When the change exceeds a certain threshold, it is considered that the liquid level has reached the sensing point.

The sensor can be used in many DIY and Arduino projects. It is important that the tank is not made of metal.

Technical data

input voltage(Vin): DC 5V
ripple and noise voltage: <100mVp-p
current consumption: 5mA±2mA
output method: NPN
output current: ≤100mA
response time: 500mS
working temperature: -20~105℃
sensing distance: ≤15mm
sensing accuracy: ±3mm
humidity: ≤100%
material: PC-V0
waterproof protection level: IP67
safety certification: CE
environment certification: ROHS-2.0