The CYX20 series oil injection core pressure sensor is a differential pressure sensitive device that uses stainless steel double corrugated diaphragm isolation. The measured differential pressure is transmitted to the silicon pressure sensitive element through the isolation diaphragm and filled silicone oil, achieving the accuracy of the differential pressure. measuring. The core adopts internationally advanced high-stability, high-precision silicon pressure chip
1 Overview
The CYX20 series oil injection core pressure sensor is a differential pressure sensitive device that uses stainless steel double corrugated diaphragm isolation. The measured differential pressure is transmitted to the silicon pressure sensitive element through the isolation diaphragm and filled silicone oil, achieving the accuracy of the differential pressure. measuring. The core adopts internationally advanced high-stability, high-precision silicon pressure chip, adopts sintering seat of stress optimization design, through patch, gold wire bonding, diaphragm welding, high vacuum oil injection, pressure cycle stress relief, high temperature aging, Process production such as temperature compensation. The shape, size and sealing method of general-purpose products are consistent with the international mainstream similar products, and have good interchangeability. They are widely used in differential pressure and liquid level measurement of media compatible with 316L stainless steel and nitrile rubber or fluorine rubber.
2 Product features
● Measuring range 0kPa~10kPa…3.5MPa
● Constant current/constant voltage power supply
● Diaphragm isolation type, suitable for a variety of fluid media
● All 316L stainless steel
● Static pressure 10MPa
● 1.5 times full-scale overvoltage
3 Main uses
● Industrial process control
● Liquid level measurement with pressure vessel
● Gas and liquid pressure measurement
● Differential pressure detection
● Flow meter
● Pressure detection calibration instrument
4 Technical indicators
4.1 Electrical performance
● Power supply: ≤3.0mA; DC≤10V DC
● Electrical connection: 0.2mm2 four-color 100mm silicone rubber flexible wire
● Common mode voltage output: 50% (typical value) of current type input, 40% (typical value) of voltage type input
● Input impedance: 2.7kΩ~5kΩ
● Output impedance: 3.0kΩ~6kΩ
● Response time (10%~90%): <1ms
● Insulation resistance: 500MΩ/100V DC
● Allow overvoltage: 1.5 times full scale
4.2 Structural performance
● Diaphragm material: stainless steel 316L
● Shell material: stainless steel 316L
● Pin lead: silicone rubber flexible wire
● Sealing ring: nitrile rubber, fluorine rubber (optional)
● Net weight: about 38g
4.3 Environmental conditions
● Vibration: no change under 10gRMS, (20~2000) Hz
● Constant acceleration: 100g, 11ms
● Media compatibility: 316L and nitrile rubber (optional fluorine rubber) liquid or gas
4.4 Benchmark conditions
● Medium temperature: (25±3)℃
● Ambient temperature: (25±3)℃
● Humidity: (50%±10%) RH
● Environmental pressure: (86~106) kPa
● Power supply: (1.5±0.0015) mA DC
4.5 Standard range sensitivity output and optional pressure form
Range |
full range |
pressure |
|
Range |
full range |
pressure |
0~10kPa |
(30~120) ±20 |
D |
0~400kPa |
(40~150) ±20 |
D |
|
0~35kPa |
(40-120) ±20 |
D |
0~1.0MPa |
(55~145) ±20 |
D |
|
0~70kPa |
(20~140) ±20 |
D |
0~2.0MPa |
(50-160) ±20 |
D |
|
0~100kPa |
(50-145) ±20 |
D |
0~3.5MPa |
(60-150) ±20 |
D |
|
0~200kPa |
(30~125) ±20 |
D |
4.6 Basic parameters
Parameters |
Typical value |
Maximum |
Single |
Zero output |
±1 |
±2 |
mV |
Non-linear |
0.2 |
0.5 |
%FS |
Late |
0.05 |
0.08 |
%FS |
Repeatability |
0.05 |
0.08 |
%FS |
Input/output impedance |
2.6 |
5.0 |
kΩ |
Zero temperature drift Note 1 |
±0.4 |
±1.0 |
%FS,@25℃ |
Sensitivity temperature drift Note 2 |
±0.4 |
±1.0 |
%FS, @25℃ |
Long-term stability |
0.2 |
0.3 |
%FS/year |
Excitation current |
1.5(Maximum input voltage 10V) |
mA |
|
Insulation resistance |
500(100VDC) |
MΩ |
|
Compensation temperature Note 3 |
0~50;-10℃~70℃ |
℃ |
|
Operating temperature |
-40~+125 |
℃ |
|
storage temperature |
℃ |
||
Response time |
≤1 |
ms |
|
Housing and diaphragm materials |
316L stainless steel |
|
|
O-ring |
Fluorine rubber, nitrile rubber, silicone rubber |
|
|
Measuring medium |
Fluid compatible with 316L, nitrile rubber or fluoroelastomer or silicone rubber |
|
|
Life (25℃) |
>1×108 pressure cycle (80%FS) |
Times |
|
Filling medium |
Silicone oil |
|
|
Sealing ring |
Φ16×1.8mm (Dingqing or fluorinated rubber Note 4) |
|
|
Note 1, Note 2: The typical value of zero to 10 kPa temperature drift and sensitivity temperature drift is 0.5%FS@25℃, and the maximum value is 1.2%FS@25℃. Note 2: 200kPa and below, the compensation temperature is 0~50℃; greater than 200kPa, the compensation temperature is -10℃~70℃. Note 4: The temperature resistance range of fluororubber seals is -20℃~200℃, the low temperature performance is poor, when the temperature range is lower than -20℃, please choose carefully. |
5 Type selection structure
5.1 Outline drawing
5.2 Selection Guide
*Technology identification: f means general technology, Y means negative pressure technology.
6 Schematic diagram and wiring
IN+(red line)-power supply positive IN-(black line)-power supply negative S+(yellow line)-output positive S-(blue line)-output negative
7 Application tips
● One end of the lead wire on the differential pressure core is a high-pressure end, and the other end is a low-pressure end. The high and low pressure ends can also be identified by the “H” and “L” marks on the differential pressure core. During use, the pressure applied to the high-pressure end should generally not be less than the pressure applied to the low-pressure end.
● The inlet end of the differential pressure core assembly cavity of the housing should be designed with a tapered angle, which is easy for the core assembly and prevents the right angle from scratching the seal ring. The sealing method of the differential pressure core is recommended to use the “floating” sealing structure of the side wall O-ring to avoid the compression of the front and rear ends, so as not to affect the stability of the pressure core.
● Pay attention to protect the front and back diaphragm and the compensation circuit board in the middle of the differential pressure core, so as not to damage the performance of the pressure core or cause damage to the core. A
● When assembling, pay attention to the size of the core and the tolerance of the inner shell of the transmitter. It is recommended that the cavity be processed according to the core diameter of +0.02~+0.05 to achieve the required airtightness.
● Avoid dropping, bumping, etc., which will affect the stability of the product.
● If there is a change in the pin lead, the actual physical label of the core shall prevail.