LLS060102 Non contact Liquid Level detecting Sensor Module-1 level

Liquid Level Changing and Signal Output

During usage, defining different liquid level, the level sensor module will send the logic signal.  The signal and the corresponding change of the liquid level will be shown as below :

• When the liquid level is lower than the sensing area fixed height, the indicator light will be on and the logic signal is low (H).
  
• When the liquid level is higher than/equal to the fixed height, the indicator light will be off and the logic signal is high (L)

** The installation place of the liquid level switch must be flat, and the liquid medium should be water. Insulating medium such as oil is not applicable.

** Maximum Sensing Distance D at 25 °C : About 7.0 mm from water to sensing area includes the thickness of container

Electrical Characteristic

Absolute Maximum Rating（Ta=25℃）

• Function: Non contact Liquid level detecting
• In the actual use, when the liquid level is higher or lower than the sensing area height, there is corresponding TTL logic signal to each level change, respectively Auto calibration function included.
  
• The module is used to detect the existence of liquid by sensing the capacitance, and the capacitance of liquid will be changed with temperature, especially water. Auto calibration will be started while sensing big changing of capacitance.
  
• If the liquid will have been sensed the change in temperature, please be noted that the maximum sensing distance D will be also changed. Therefore, if fixed sensing distance, the sensed height of liquid level can vary due to the impact of liquid temperature. In practice, the change in the height of liquid level should be determined by actual measurement
  
• Attention: This level sensor module uses the embedded sensing capacitance to detect the change of liquid level; therefore, it must keep all metal articles or human body influencing the capacitance far away from the sensing area to avoid the disoperation. There should be a certain distance between metal article or human body and sensing area. The distance should be determined by actual measurement.
  
• The male connector ( pitchpitch：1.25mm ) and the wire are not included in the standard package. It needs to be purchased if required.
  
• For customized design, it’s recommend that the line length between the sensing area and the main IC should not exceed 3 5cm.
  
• Please do not exceed the rated load as there will be a risk of disabling the product function.
  
• For the continued product improvement as one of the company policy, specifications may change or update without notice. The latest information can be obtained through our sales offices. Normally, all products are supplied under our standard conditions.

The variation of liquid height in upper level or lower level of the non metallic container can be detected by using this sensor without having contact with the liquid,especially for drinking water filter, coffee machine and etc. The traditional sensors need to be installed inside of the container to detect the liquid level, having the risk of contaminating the drinking water. It can provide consumer a more reliable selection.

Coffee / Water Dispenser Other applications that need non contact liquid level detect ion Model : LLS040100