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Fast response speed ESMPE17 photoelectric liquid level switch for tank

The photoelectric liquid level switch is a small integrated liquid level sensor that uses the principle of optical refraction. It has a built-in infrared emission/reception chip. When the probe is in contact with liquid or not, the refractive index changes, allowing it to determine the presence of liquid. It is small in size, has no mechanical parts, responds quickly, and is suitable for high and low liquid level alarms, water shortage protection, and full water detection in pure water, oil, chemical liquids, and acidic or alkaline liquids.

    Working Principle

     The photoelectric liquid level switch uses infrared detection, utilizing the principles of light refraction and reflection. Light will undergo reflection or refraction at the interface between two different media. When the liquid being measured is at a high level, a boundary is formed between the liquid and the photoelectric switch. When the liquid is at a low level, a boundary is formed between the air and the photoelectric switch. These two types of boundaries result in different intensities of reflected light received by the photoreceptor inside the switch, corresponding to two different switch states.

    Product Features

    1.Features accurate liquid level detection, high repeatability, and fast response speed.


    2.The output is only related to whether the photoelectric probe contacts the liquid surface and is unrelated to other properties of the medium such as temperature, pressure, or density.

    3. High reliability, long service life, and maintenance-free advantages, and can also be made into multi-point liquid level switches.

    4. Voltage / NPN/PNP/Relay multiple outputs, easy wiring

    5. Easy installation, standard M14 thread installation

     application scenarios

    Water purifiers, air compressor refrigerated dryers, oil pump oil tanks, medical equipment, biochemical instruments, beverage equipment, lithium battery equipment, refrigeration units, small water tanks, acid and alkali chemical tanks, automation circulation water replenishment lacks protection.

    Product detail

    ESMPE17 (2)ESMPE17 (1)ESMPE17 (2)

    Technical Specifications

    Parameter

    Condition 

    Typical 

    Units

    Operating voltage  

     

    5

    V

    There is a water state output voltage

    VDD=5V Ta=25℃

    0

    V

    The output voltage in the waterless state

    VDD=5V Ta=25℃

    5

    V

    There is a water state current

    VDD=5V Ta=25℃ in water

    15

    mA

    No water state current

    VDD=5V Ta=25℃ no water

    20

    mA

    Operating temperature

    VDD=5V

    -25~85

    Wiring Definition

    This is a paragraph

    1. Black, White - Power
    2. Green - Ground
    3. Yellow - Common (COM), Blue - Normally Closed (NC), Red - Normally Open (NO)

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