1 Summary
CYX series piezoresistive pressure sensor adopts the internationally advanced high stability and high precision silicon pressure chip, and adopts the sintering seat with stress optimization design, which is produced by the processes of chip mounting, gold wire bonding, diaphragm welding, high vacuum oil injection, pressure cycle stress relief, high temperature aging, temperature compensation, etc. With more than 30 years of development, production experience and technological innovation, the products have excellent stability and performance, and are widely recognized by users.
2 Product features
measurement range: -100kPa ~ 0 ~ 10kPa…100MPa
3 pressure forms: gauge pressure (G), absolute pressure (A), seal gauge pressure (S)
constant current / voltage supply
isolated structure, suitable for multiple fluid media
Φ 19mm standard pressure sensor
all 316L stainless steel
titanium structure optional, tantalum diaphragm customized
3 Application
industrial process control liquid level measurement
gas and liquid pressure measurement pressure detection and calibration instrument
pressure switch and hydraulic system well monitoring
refrigeration equipment and air conditioning system fire Internet of things
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
pressure lead-in tube material: stainless steel 316L
sealing ring: NBR, Viton (optional)
pin lead: gilded Kovar
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 (Viton 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 |
G |
0~1.6MPa |
125~185 |
150 |
G/A |
| 0~20kPa |
70~110 |
90 |
G |
0~2.0MPa |
50~70 |
60 |
G/A |
| 0~35kPa |
55~80 |
70 |
G/A |
0~3.5MPa |
100~120 |
110 |
G/S/A |
| 0~70kPa |
55~80 |
60 |
G/A |
0~7.0MPa |
120~150 |
135 |
S/A |
| 0~100kPa |
60~85 |
75 |
G/A |
0~10MPa |
180~230 |
200 |
S/A |
| 0~200kPa |
65~85 |
75 |
G/A |
0~25MPa |
140~170 |
150 |
S/A |
| 0~400kPa |
60~80 |
70 |
G/A |
0~40MPa |
230~280 |
250 |
S/A |
| 0~600kPa |
90~120 |
100 |
G/A |
0~60MPa |
100~160 |
130 |
S/A |
| 0~1.0MPa |
80~120 |
100 |
G/A |
0~100MPa |
100~150 |
120 |
S/A |
4.6 Basic parameters
| Parameters |
Typical value |
Max value |
Unit |
| Full scale output |
100 |
250 |
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 |
viton, nitrile rubber, silicone rubber |
|
| Measuring medium |
Fluids compatible with 316L, NBR or Viton or silicone |
|
| Life (25 ºC) |
> 1 × 108 pressure cycle (80% FS) |
times |
| Filling medium |
silicone oil |
|
| Sealing ring |
Φ 16 × 1.8mm (nitrile or fluorinated rubber (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
5.1 Pressure sensor model selection and outline drawing
| Series |
Range |
Model |
Outline drawing |
| CYX32 |
-100kPa~3.5MPa |
CYX3201 |
|
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 "floating" sealing structure of O-ring on the side wall is recommended for sealing the pressure sensor, which can avoid the front end being compressed and the stability being affected.
Pay attention to protect the front diaphragm and the compensation circuit board at the rear end, so as not to affect the performance or cause damage to the pressure sensor.
The shell cavity shall be designed with tapered angle as shown in the figure, which is easy for assembly and can prevent the seal ring from being scratched by right angle.
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.
During assembly, it is required to place vertically and press down evenly to prevent the shell from jamming or damaging the compensation plate.
Do not press the metal diaphragm with hands or hard objects to avoid damaging the pressure sensor due to chip deformation or perforation.
When wiring, the pins should not be cut too short, the length is generally no less than 5mm, and the welding time is no more than 5s.
The pressure lead-in tube at the back of G type pressure sensor shall be connected with the atmosphere; water, steam or corrosive medium shall not enter the reference cavity at the back of the sensor body.
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.
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