Piezoresistive Differential Pressure Transmitter

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Last update: 2019-08-09 03:54
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Product details

The sensitive element of the YZB490 differential pressure transmitter is a solid piezoresistive sensitive chip. The spaces between the chip and the two convoluted diaphragms are injected with silicone oil. The differential pressure exerts a force on the convoluted diaphragms at the two ends, squeezing the silicone oil in between which then transmits it to the sensitive chip. And the sensitive chip is connected with signal treatment circuit by conductor wire. The piezoresistive effect of semiconductor silicon material is employed by the product to realize the conversion between differential pressure and electric signal. Due to the good linear relationship between the signal outputted by the Wheatstone bridge on the sensitive chip and the differential pressure, the differential pressure can be measured correctly. It is suitable for measuring differential pressures in various air or liquid pipes of different industries, such as oil, chemical and electrical industries, as well as hydrological sector.


 Performance Index

Range code

0A

02

03

07

08

09

10

12

13

Unit

kPa

MPa

Measuring range

0~35

0~70

0~100

0~200

0~350

0~700

0~1

0~2

0~3.5

Positive overpressure allowed

70

150

200

400

700

1400

2.0

4.0

7.0

Negative overpressure allowed

35

70

100

200

350

700

1.0

1.0

1.0

Static pressure

≤20MPa

 

 


Minimum

Typical Value

Maximum

Unit

Accuracy



0.5


±%FS

Zero temperature error

≤200kPa


0.75

1.25

 

 

±%FS, reference 25°C

>200kPa


0.5

0.75

 

Temperature error at full range

≤200kPa


0.75

1.25

>200kPa


0.5

0.75

 

Long-term stability

≤200kPa

0.5

 

±%FS / year

>200kPa

0.2


 

Static pressure impact

0.05

±%FS, each 100kPa

Compensation temperature

0~50

 

°C

Working temperature

-10~80

Storage temperature

-40~120

 Electrical Performance

Power supply: two wires 15V~28V DC three wires 15V~28V DC

Output signal: two wires 4mA~20mA DC three wires 0/1V~5V DC, 0mA~10/20mA DC

Electrical connection: connector or seven-core cable with response time (10%~90%):≤1ms, insulation resistance: 100MΩ, 50VDC

Structural material

Shell:  Stainless steel 1Cr18Ni9Ti

Convoluted diaphragm:  Stainless steel 316L O-shaped sealing ring: Fluororubber Infused liquid: Silicone oil pressure connection:  G1/4 internal thread

Ambient conditions

Vibration: the change ≤1% after vibration under 3gRMS, 30Hz~2000Hz impact: the change ≤1% after impact under 100g, 10ms

Medium: liquid or gas compatible with the structure material

 

 

 

Outline Structure

 (Unit: mm)


 

 


Electrical connection

Connector connection                                                    Cable connection

 

 


The guard grating shall be provided with this intrinsic safety explosion-proof transmitter to constitute an intrinsic safety explosion-proof system. The electrical connection is shown in the following figure:

 

 

 

 

≤35kPa Transmitter explosion-proof level and parameters:

Guard grating explosion-proof level and parameters:


ExiaII BT6 Ga

ExiaIIC

Ui: 28V DC Ii93mA DC

Uo: 28V DC Io93mA DC

Po: 0.65W

Li: 0.1mH Ci: 0.29μF Pi: 0.65W



>35kPa Transmitter explosion-proof level and parameters:

Guard grating explosion-proof level and parameters:


ExiaII CT6

ExiaIIC


Ui: 28V DC Ii93mA DC

Uo: 28V DC Io93mA DC

Po: 0.65W

Li: 0.1mH Ci: 0.044μF Pi: 0.65W

Selection Guide



 

YZB490

Piezoresistive Differential-pressure Transmitter



Code

Measuring range

 

 

 

X[0~X]

kPa or

MPa

Range code

Measuring range

kPa

Allowable overpressure kPa

Range code

Measuring range

MPa

Allowable overpressure MPa

Positive

Negative

Positive

Negative

0A

0~35

70

35

09

0~0.7

1.4

0.7

02

0~70

150

70

10

0~1.0

2.0

1.0

03

0~100

200

100

12

0~2.0

4.0

1.0

07

0~200

400

200

13

0~3.5

7.0

1.0

08

0~350

700

350







Code

Output signal

E

4mA~20mA DC

F

1V~5V DC

J

0V~5V DC

Q

0mA~10mA DC

U

0mA~20mA DC

V

0V~10V DC


 





 

Code

Structural material

Isolation diaphragm

Interface

Shell

22

Stainless steel 316L

Stainless steel

Stainless steel

24

Stainless steel 316L

Stainless steel 316L

Stainless steel 316L



Code

Additional function

C4

G1/4 internal thread pressure interface

B1

Connection by 4-core connector

B2

Cable connection with cable length of 1.5m

M3

3 1 LCD digital display meter (with only 4mA~20mA DC output)

2

M4

3 1 LED digital display meter (with only 4mA~20mA DC output)

2

i

The intrinsic safety explosion-proof type ExiaⅡCT6(>35kPa) /ExiaⅡBT6Ga(35kPa)

T

Marine product



YZB490  [0~100]kPa E 22 C4B2 complete model and specification

Notes for Selection

 

1. It is recommended to install three valve groups between the measuring point and the transmitter to ensure that the measured medium is stressed into the positive and negative chambers of the transmitter slowly and evenly, so that the reliable operating of the transmitter can be ensured.

2. It is recommended to make the pressure interfaces at the two ends horizontal upon installation, so as to minimize the impact of installation on the product.

3. Upon model selection, please consider that the static pressure at the measuring point shall not be over 20MPa and the overpressure on the positive and negative chambers of the transmitter shall not be over the specified value of the product.

4. During ordering, please note that the M3 and M4 digital display meters are not included for explosion-proof product and marine use product.

5. The digital display meter document is included in the document for YZB480 pressure transmitter.

6. For any special requirement, please feel free to contact us and show it in the purchase order.


http://www.youchurtsensor.com/

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