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 scale
3 Application
industrial process control liquid level measurement of pressure vessel
gas and liquid pressure measurement pressure detection and calibration instrument
differential pressure detection flow meter
4 Technical indicators
4.1 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 scale
4.2 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 38g
4.3 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 DC
4.5 Standard range sensitivity output and optional pressure form
| Range |
Full scale output (mV) |
Typical value |
Pressure
form |
|
Range |
Full scale output (mV) |
Typical value |
Pressure form |
| 0~10kPa |
35~60 |
45 |
D |
0~400kPa |
60~80 |
70 |
D |
| 0~20kPa |
70~110 |
90 |
D |
0~600kPa |
90~120 |
100 |
D |
| 0~35kPa |
55~80 |
70 |
D |
0~1.0MPa |
80~120 |
100 |
D |
| 0~70kPa |
55~80 |
60 |
D |
0~1.6MPa |
125~185 |
150 |
D |
| 0~100kPa |
60~85 |
75 |
D |
0~2.0MPa |
50~70 |
60 |
D |
| 0~200kPa |
65~85 |
75 |
D |
0~3.5MPa |
100~120 |
110 |
D |
4.6 Basic parameters
| Parameters |
Typical value |
Max value |
Unit |
| Full scale output |
80 |
150 |
mV |
| Zero output |
± 1 |
± 2 |
mV |
| Nonlinearity |
0.2 |
0.5 |
%FS |
| Hysteresis |
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, @25ºC |
Sensitivity temperature drift
(note 2) |
±0.4 |
±1.0 |
%FS, @25ºC |
| Long-term stability |
0.2 |
0.3 |
%FS / year |
| Excitation current |
1.5 (the maximum input voltage can be 10V) |
mA |
| Insulation resistance |
500(100VDC) |
MΩ |
| Compensation temperature (note 3) |
0~50; -10~70 |
ºC |
| Working temperature |
-40~+125 |
ºC |
| Storage temperature |
-40~+125 |
ºC |
| Response time |
≤1 |
ms |
| Housing and diaphragm material |
stainless steel 316L |
|
| O-ring |
FKM, NBR, silicone rubber |
|
| Measuring medium |
Fluids compatible with 316L, NBR or FKM or silicone |
|
| Life (25 ºC) |
> 1 × 108 pressure cycle (80% FS) |
times |
| Filling medium |
silicone oil |
|
| Sealing ring |
Φ 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 Guide
6 Schematic diagram and wiring mode
| IN + (red wire) - power supply positive |
|
IN - (black wire) - power supply negative |
| S + (yellow wire) - output positive |
|
S - (blue wire) - output negative |
7 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 structure of O-ring on the side wall is recommended for sealing the differential pressure sensor, which can avoid the front end being compressed and the stability being affected.
Pay attention to protect the front and rear diaphragm and middle compensation circuit board, so as not to affect the performance or cause damage to the pressure sensor.
During assembly, pay attention to the tolerance fit between the pressure sensor size and the inner shell of the transmitter. It is recommended that the cavity be processed according to + 0.02 - + 0.05 of the pressure sensor diameter to achieve the required air tightness.
Avoid falling, crashing, etc., which will affect the stability of the product.
In case of any change of pin lead, the label with the pressure sensor shall prevail.
5.2 Selection Guide
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