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High Temperature Exhaust Gas Treatment Differential Pressure Sensor

Sensor

High Temperature Exhaust Gas Treatment Differential Pressure Sensor

Description

The D-S0140 series pressure sensor is a differential pressure sensor based on silicon piezoresistive effect, implemented using a hybrid technology of CMOS and MEMS. The pressure to be measured is loaded onto the silicon film from the back of the chip, allowing the sensor to be used in harsh environments. The pressure sensor outputs a voltage signal that is linearly proportional to the pressure, and provides precise and stable signal output and temperature compensation.

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    Feature

    • High stability and reliability
    • Fast response
    • Operating temperature range -40°C to +135°C
    • Working pressure range -1.7 ~ +34.5kPa (gauge pressure)
    • CMOS technology and MEMS hybrid technology
    • PBT+30%GF shell material
    • Comply with RoHS Directive

    Apply

    • DPF diesel particle filter unit

    Inductive property

    Argument

    Conditions

    Operating temperature

    -40℃ ~ +135℃

    Storage temperature

    -40℃ ~ +135℃

    Working medium

    ail gas

    Working pressure

    (-1.7) ~ 34.5kPa (gauge)

    Overload pressure

    300kPa(g)

    Breaking pressure

    450kPa(g) (When the sensor is subjected to the failure pressure, the sensor is not required to be able to return to the normal working state, but the sensor must not break and leak under the failure pressure)

    Mounting Angle

    +/-30° (installation Angle relative to vertical position (refer to drawings))

    Supply voltage (Vcc)

    5.0±0.25V

    Supply current

    10mA MAX

    Overvoltage protection

    16V<1hour

    Normal temperature accuracy

    ±1.2%Vcc @ 25℃

    Total error band

    ±2%Vcc (output error includes hysteresis error, repeatability error, linearity error and life drift error)

    Response time

    2ms MAX


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    Mechanical dimensions

    Shell material: PBT+30% GF
    Connection: TYCO FEP1J0973703
    The appearance, size, and material of the sensor should follow the drawings.

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    Environmental testing and reliability parameters


    Number

    Test Item

    Test Conditions

    Performance Requirements

    1

    Overload pressure

    Overload pressure :300kPa(g)

    Pressure time: 5min

    Test temperature: 20-25℃

     After the sensor is restored to normal operation, it complies with the characteristics.

    2

    Destruction pressure

    Burst pressure :450kPa(g)

    Pressure time: 1min

    Test temperature: 20-25℃

     When the sensor is subjected to the failure pressure, the sensor is not required to be able to return to the normal working state, but the sensor cannot be damaged and leaked under the failure pressure.

    3

    Pressure temperature cycle

    he temperature cycle is -40℃~135℃

    The pressure cycle is -1.7~34.5kPa

    Hold for 84h and maintain for 0.5 hours at each pressure limit point and temperature point

    All sensors should meet the accuracy requirements after testing and there should be no leakage.

    4

    Low temperature storage

    Test temperature: -40 ℃

     

    Test time: 72 hours

     All sensors should meet the accuracy requirements after testing and there should be no leakage.

    5

    High temperature storage

    Test temperature: 135 ℃

    Test time: 72 hours

    All sensors should meet the accuracy requirements after testing and there should be no leakage.

    6

    Thermal Shock

     Low temperature: -40 ℃

    High temperature: 135 ℃

    Cycle count: 500 Cycles

    Holding time for each temperature point: 1 hour

    The sensor is not powered on during the experiment.

    All sensors should meet the accuracy requirements after testing and there should be no leakage.

    7

    Temperature and humidity cycle

    The humidity chamber with the initial temperature of +23℃ and the initial humidity of HR83% was heated to +40℃ within 5h, and the humidity was raised to HR92%, and kept for 12h; After 5h, the temperature was lowered to +23℃, and the humidity was HR83% for 2h. The above process was repeated 21 times for 504h. The sensor is not powered up during the experiment.

    All sensors should meet the accuracy requirements after testing and there should be no leakage.

     

    8

    Durability test

     Pressure cycle at high temperature 110 +/-5℃ : from -1.7kPa to 34.5kPa, frequency is 0.5Hz; The number of cycles is 2 million. The sensor is not powered up during the experiment.

    All sensors should meet the accuracy requirements after testing and there should be no leakage.

     

    9

    Fluid compatibility test

    The sensor is connected to an electrical harness and a 5V power supply is applied. The four reagents in the figure below are tested separately. Test method: Drop 5-10 drops of reagent onto the pressure interface of the sensor as shown in the following figure

    (The air inlet direction is upward), and then the sensor is placed in a temperature box at 100 ° C for 2 hours. After rinsing, repeat the test with the other three reagents.

    number  Type   experiment quantity   

    1       diesel         5 drops

    2     Engine oil        10 drops

    3      gasoline        10 drops

    4        glycol        10 drops

    All sensors should meet the accuracy requirements after testing

     


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