<nav id="wyomc"></nav>
  • <menu id="wyomc"><strong id="wyomc"></strong></menu>
  • 產品中心

    Products

    SW-12

    SW-12 water level sensor

    SW series water level sensor is a component designed for checking water level. According to the water level, the product sends oscillation frequency to the appliance’s control board. It depends on the pressure, magnetic field, and electric signal to realize the function.

    TEST CONDITIONS

    1.Temperature 25℃±5

    2.Humidity:  45%75%

    3.Atmospheric pressure 86kPa106kPa




    TECHNICAL REQUIREMENTS

    TEST ITEM

    TECHNICAL REQUIREMENTS

    TEST METHOD

    INSTRUMENT

    Rated voltage

    DC5V±0.2V   10mA

    Measure

    Digital multimeter

    Appearance

    No rust on metal surface, no crack or deformation on plastic surface, no exposed bottom, cracks, bubbles or shrink holes on internal coating. Markings should be clear. 

    Visual

    /

    Rated temperature

    10℃~+60

    Measure

    thermometer 


    Dimension

    Meet the requirements of the specified values in the drawings or technical specifications 

    Measure

    Vernier caliper/projector 

    Curve

    The frequency and its corresponding pressure relationship set under normal temperature and humidity should meet the requirements specified in the drawings or technical specifications 

    Measure

    Digital frequency meter

    pressure gauge

    Air tightness

    Measured with a standard water pressure gauge, pressurized for 1 minute at a pressure of 7.6kPa, the pressure sensor should not leak

    Test

    Air tightness test deck

    Electrical strength

    Apply 1500V, 50Hz, or 1800V/s between the conductive part of the pressure sensor and the mounting hole, and there should be no breakdown or flashover.

    Test

    Withstand Voltage Tester

    Insulation resistance

    The insulation resistance between the conductive part and the exposed

    Test

    Insulation Resistance Tester

    High temperature

    After placing the product in a constant temperature test box at 70°C±2°C for 168h and placing it in room temperature and humidity for 0.5h, there should be no cracks in the plastic parts, and the water level change of each gear is less than 15mm 

    Test

    High and low temperature test chamber


    Digital frequency meter
    pressure gauge 


    Low temperature

    After placing the product in a constant temperature test box at -20°C±2°C for 168h, and placing it in room temperature and humidity for 0.5h, there should be no cracks in the plastic parts, and the water level change of each gear is less than 15mm


    Test

    High and low temperature test chamber


    Digital frequency meter
    pressure gauge 


    Thermal shock

    Place the pressure sensor at a high temperature of 80°C±2°C for 1h, a room temperature of 20°C±2°C for 30 minutes, a low temperature of -20°C±3°C for 1 hour, totally 20 cycles. After recovery for 0.5 hours, the plastic parts should be free of cracks. The water level change of each gear is less than 15mm


    Test

    High and low temperature test chamber


    Digital frequency meter
    pressure gauge



    Nozzle strength

    Apply a tensile force of 50N on the air nozzle of the pressure sensor, upright, left and right directions respectively, and there will be no rupture or deformation after 5S 

    Test

    Tension gauge 

    High pressure

    Slowly pressurize from 0 to 15kPa at a pressure change rate of no more than 500Pa/S. After a 1-minute test, the pressure sensor should not leak 

    Test


    Air tightness tester

    Water resistance

    After immersing the pressure sensor in a water tank with a water level of 10cm±1cm and a water temperature of 20℃±10℃ for 8 hours, the insulation resistance should be greater than 5MΩ after drying the water droplets.

    Test

    Water tank

    Insulation Resistance Tester

    Salty spray

    Place the working sensor in the salt spray box. After 48 hours, the metal parts must not be corroded, and the water level change of each gear is less than 15mm


    Test

    Salt spray test chamber


    Digital frequency meter
    pressure gauge 


     Humidity

    After placing the pressure sensor at a temperature of 40℃±2℃ and a relative humidity of 95% for 168 hours, the insulation resistance measured directly in the test chamber should be greater than 2MΩ. After 30 minutes, the water level change of each gear should be less than 15mm.

    Test

    Constant temperature and humidity test chamber


    Digital frequency meter
    pressure gauge
    Insulation Resistance Tester 


    Drop

    Drop the pressure sensor from a height of 30cm in any direction on a wooden board with a thickness of 20mm or more, a total of 3 times, the water level change of each gear is less than 15mm 

    Test

    /

    Durability

    After acting 50,000 times at a speed of 20 times/min under rated voltage, the water level change of each gear is less than 15mm 

    Test

    Test deck

    Hazardous substance compliance

    For products that need to comply with hazardous substance restrictions, any parts on the product must meet the requirements 


    Test


    Fluorescence analyzer 

     Pulling force (applicable to pulsator )

    Pull-off force of connecting pressure pipe and pressure sensor nozzle ≥60N

    Test


    Tension gauge

      

         

     

     

     

     Installation and Inspection

    The air nozzle is placed downward (as shown in below picture), and the action water level of each gear meets the technical requirements.

    Appearance and frequency/water level  







    Frequency and water level correspondence

     

     

     

          

     

    frequency kHz 

    water level mm

    initial

    26.80±0.3

    0

    reset

    25.31

    149±15

    water level 1

    24.89

    190±13

    water level 2

    24.47

    232±10

    water level 3

    24.02

    282±10

    water level 4

    23.45

    340±7

    water level 5 CTQ

    23.01

    390±7

    high water level

    22.50

    460±15







    Related Products

    Committed to providing users with high-quality solutions. If you have any questions or need more information, please feel free to contact us!
    爱彩乐