PE19 infrared photoelectric liquid level sensor

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Quick Details
Place of Origin:
Shaanxi, China (Mainland)
Brand Name:
ESM photoelectric liquid level switch
Model Number:
water level switch
photoelectric switch
infrared photoelectric liquid level sensor
Output signal:
High and low signal
measuring way:
Specular reflection
Power voltage:
environment temperature:
life time:
small size
application filed:
Humidifier,air condition fan,steam, protection level control


1.PE19 Steam class level control water level switch liquid optical level sensor
2.liquid level control
3.non contact sens

PE19  infrared photoelectric liquid level sensor
Product Description




1)No mechanical moving parts, high reliability

2)Small size, can be installed in any direction

3)High precision level control





1) humidifiers, heaters
2) pumps, bathtub, sanitary ware, medical equipment
3) Steam class level control and other needs of electrical appliances, equipment, etc




Size & Wiring



Technical data

1)working data


Liquid level state

Signal port voltage Output(V)

True value

Total current

Power consumption(mW)

Above the critical level





Below the critical level








1. detected when the liquid is water, the water level is lower than the critical level, water vapor, water vapor or water droplets in the sensor Surface of the body assembly, thereby leading to the signal output voltage decreases.
Therefore, in practical application, taking into account the water vapor, water vapor, water droplets or affect, the set value of the threshold voltage level VT, that is, if greater than the output voltage signal terminal VT, it is determined that the level is below the critical level, the output voltage signal terminal
If less than VT, the level is higher than the critical level is determined.
VT general value of 0.25-0.5V, specific values according to water vapor, water vapor or droplets generated and the impact of process degree determined. When the liquid to be detected for the other, it will also be affected by the droplet, it is also considered press law.
2 Consider the level of fluctuation characteristics, image stabilization to join in the program logic.
3 This section level sensor is not waterproof, the entire probe can not be placed in the liquid used.
4. Actual use, the level sensor probe surface can not have too much dirt, and if so, please immediately cleaned, Cleaning the surface of the detection process can not damage it.


2)Limit parameter(Ta=25℃)






Working temperature



Storage temperature





50,000 h



Use and testing


The level sensor is installed above one way, and then connect the following circuit, the output signal terminal condition consistent with the level of the voltage signal, this signal is used as the liquid level control signal access MCU (micro controller) A / D (analog when digital converter) ports, when the level exceeds a critical level and flooded the sensor body, then the signal output is low voltage, when the liquid level is below the critical level and reveal the sensor body, then the signal output is high voltage.

Our Services



1.Supply ultrasonic sensor,pressure sensor,load sensor,proximity sensor,temperature sensor,photoelectric sensor,flow sensor,ultrasonic transducer,pressure core body,gps products,etc

2.All of our products can be customized,OEM service offered



Company Information



Xi 'an ESM Tech Co. Ltd launch its journey as a quality products manufacturer. We are currently producing precision series of products like ultrasonic sensors, temperature sensors, load cells, stress sensors, displacement sensors, proximity sensors, material level monitoring meters, and flow meters etc.


A core of highly profession and experience engineers are engaged with us for research and development process. Our range of equipment boundary expanded recently to GPS tracking equipment that able to detect vehicles even pets and moving objects.




Our website


Skype:         eric.hao9   









Note:Please confirm the details while ordering

1.output signal

2.power supply


Any questions or demands, please do not hesitate to contact us.

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