Cyx-20 Silicon Oil Filled Differential Piezoresistive Pressure Sensor

1 Summary      CYX20 series differential pressure sensor is a differential pressure sensitive device isolated by stainless steel double corrugated diaphragm. The accurate measurement is achieved by transmitting through the isolation diaphragm and filled silicone oil to the silicon pressure-sensitive element. The sensor is made of international advanced silicon pressure chips with high stability and high precision, and adopts the sintering base with stress optimization design. The sensor is produced by the following processes: patching, gold wire bonding, diaphragm welding, high vacuum oil injection, pressure cycle stress relief, high temperature aging, temperature compensation, etc. The shape, size and sealing mode of the general products are consistent with the international mainstream products of the same kind, and have good interchangeability. They are widely used for differential pressure and liquid level measurement of compatible media with 316L stainless steel, NBR or FKM.  2 Product features    measurement range: 0 ~ 10kPa…3.5MPa    constant current / voltage supply    isolated structure, suitable for multiple fluid media    all 316L stainless steel    static pressure 10MPa    1.5 times overvoltage of full scale3 Application     industrial process control                               liquid level measurement of pressure vessel     gas and liquid pressure measurement          pressure detection and calibration instrument      differential pressure detection                       flow meter4 Technical indicators4.1 Electrical performance    power supply: ≤ 3.0mA; DC ≤ 10V DC    electrical connection: 0.2mm² four color 100mm silicon rubber flexible wire    common-mode voltage output: 50% of current type input (typical value), 40% of voltage type input (typical value)    input impedance: 2.7kΩ ~ 5kΩ    output impedance: 3.0kΩ ~ 6kΩ    response time (10% - 90%): < 1ms    insulation resistance: 500MΩ / 100V DC    allowable overvoltage: 1.5 times of full scale4.2 Structure performance     diaphragm material: stainless steel 316L    shell material: stainless steel 316L    pin lead: silicone rubber flexible wire    sealing ring: NBR, FKM (optional)    net weight: about 38g4.3 Environment condition    vibration: no change at 10gRMS, (20-2000) Hz    constant acceleration: 100g, 11ms    media compatibility: liquid or gas compatible with 316L and NBR (FKM optional)4.4 Reference conditions    medium temperature: (25 ± 3) ºC    ambient temperature: (25 ± 3) ºC    humidity: (50% ± 10%) RH    ambient pressure: (86-106) kPa    power supply: (1.5 ± 0.0015) mA DC4.5 Standard range sensitivity output and optional pressure formRangeFull scale output (mV)Typical valuePressureform RangeFull scale output (mV)Typical valuePressure form0~10kPa35~6045D0~400kPa60~8070D0~20kPa70~11090D0~600kPa90~120100D0~35kPa55~8070D0~1.0MPa80~120100D0~70kPa55~8060D0~1.6MPa125~185150D0~100kPa60~8575D0~2.0MPa50~7060D0~200kPa65~8575D0~3.5MPa100~120110D4.6 Basic parametersParametersTypical valueMax valueUnitFull scale output80150mVZero output± 1± 2mVNonlinearity0.20.5%FSHysteresis0.050.08%FSRepeatability0.050.08%FSInput / output impedance2.65.0kΩZero temperature drift(note 1)±0.4±1.0%FS, @25ºCSensitivity temperature drift(note 2)±0.4±1.0%FS, @25ºCLong-term stability0.20.3%FS / yearExcitation current1.5 (the maximum input voltage can be 10V)mAInsulation resistance500(100VDC)MΩCompensation temperature (note 3)0~50; -10~70ºCWorking temperature-40~+125ºCStorage temperature-40~+125ºCResponse time≤1msHousing and diaphragm materialstainless steel 316L O-ringFKM, NBR, silicone rubber Measuring mediumFluids compatible with 316L, NBR or FKM or silicone Life (25 ºC)> 1 × 108 pressure cycle (80% FS)timesFilling mediumsilicone oil Sealing ringΦ 16 × 1.8mm (NBR or FKM (note 4)) Note 1 & 2. 0-10kPa zero temperature drift and sensitivity temperature drift: typical value is 0.5% FS @ 25 ºC, maximum value is 1.2% FS @ 25 ºC.Note 3. compensation temperature 0~ 50 ºC for ranges ≤200kPa; - 10ºC~ 70 ºC for ranges >200kPa.Note 4. temperature resistance range of viton seal ring is - 20 ºC ~ 200 ºC, low temperature performance is poor, When the temperature is lower than - 20 ºC, please verify before using.5 Model structure selection 5.2 Selection Guide6 Schematic diagram and wiring modeIN + (red wire) - power supply positive IN - (black wire) - power supply negativeS + (yellow wire) - output positive S - (blue wire) - output negative7 Application Tips   The leading line end of the sensor is a high pressure end, and the other end is a low pressure end. The "H" and "L" marks on the sensor can also be used to identify the high and low pressure ends. During operation, the pressure added to the high pressure end should not be less than the pressure added to the low pressure end.   Housing: the inlet end of assembly cavity should be designed with a conical angle, which is easy to assemble and prevent the right angle from scratching the sealing ring. The "floating" sealing struc