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WA19 Diezoresistive Silicon Oil Filled Analog Pressure Sensor
  • WA19 Diezoresistive Silicon Oil Filled Analog Pressure Sensor

WA19 Diezoresistive Silicon Oil Filled Analog Pressure Sensor

Details

Introduction:

 

WA19 series are MEMS technology based piezoresistive silicon sensor. It is a kind of high stable and high accuracy OEM preesure measurement sensor. This series are sealed with pressure diaphram of international well-known manufacturers. The external pressure is passed to sensitive elements through 316L stainless steel diaphram and internal silicon oil. Thus it can be used to measure all pressure media compatible with 316L stainless steel.

Each sensor was strictly temperature compensated for both zero and span before shipment to ensure measurement accuracy in complex environment.

There are two options of excitation power -- current and voltage.

 

Applications

  • Automation control  

  • Pressure instruments

  • Level measurement

  • Pressure transmitters

 

Features:

  • High stability and high accuracy

  • Pressure range:0-40Kpa…7Mpa

  • Wide temperature compensation range

  • Measuring corrosive media ( media compatible with 316L)

  • Standard mounting size

  • Typical output: 0-100mV

 

Specifications of current excitation(1.5mA, 25℃)

Parameters

Min.

Typical

Max.

Accuracy(%FS)




Non-
Linearity
1

40Kpa


±0.20

±0.30

>40Kpa


±0.10

±0.20

Hysteresis2


±0.05

±0.1

Repeatibility3


±0.05

±0.1

Output(mV)




Zero

-2

±1

2

Span(FS)

70



Temp. characters




Operation Temp.(℃)

-40


125

Compensation Temp(℃)

40Kpa

0


50

100Kpa

0


70

>100Kpa

-10


70

Zero Temp.error(%FS)4


±0.75

±1.0

Span Temp. error(%FS)4


±0.75

±1.0

Thermal hysteresis(%FS)5


0.1


Long term Stability




   Zero (±%FS annual)


0.1


   Span (±%FS annual)


0.1


Supply Current

0.5mA

1.5mA

2mA

Input Resistance

2kΩ

2.5kΩ

3kΩ

Output Resistance

2.5kΩ

3kΩ

3.7kΩ

Load Resistance6

5MΩ



Insulation Resistance(50V)7

50MΩ



 

Specifications of voltage excitation(10VDC 25℃)

Parameters

Min.

Typical

Max.

Accuracy(%FS)




Non-
Linearity
1

40Kpa


±0.20

±0.30

>40Kpa


±0.10

±0.20

Hysteresis


±0.05

±0.1

Repeatability


±0.05

±0.1

Output(mV)




Zero

-2

±1

2

Span(FS)

98

100±1

102

Temp. characters




 Operation Temp.(℃)3

-40


125

Compensation Temp(℃)

40Kpa

0


50

100Kpa

0


70

>100Kpa

-10


70

Zero Temp.error(%FS)4


±0.75

±1.0

Span Temp. error(%FS)4


±0.75

±1.0

Thermal hysteresis(%FS)


0.1


Long term Stability




   Zero (±%FS annual)


0.1


   Span (±%FS annual)


0.1


Supply Voltage


10VDC

14VDC

Input Resistance

6kΩ

8kΩ

10kΩ

Output Resistance

2.5kΩ

3kΩ

3.7kΩ

Load Resistance5

5MΩ



Insulation Resistance(50V)6

50MΩ




Pressure Range

0-40Kpa…7Mpa

Pressure
Overload

≤4Mpa

2X

7Mpa

1.5X

Pressure Media

Liquids and Gases compatible with 316L Stainless Steel

※Notes:      

1. Least square method fits straight line.      

2. Pressures to senor circulate from min. to max. span (positive stroke) and max. span to min. (negative stroke) under working pressure range, testing output discrepancy between positive and negative strokes within working pressure range.

3. Same as the second testing method, sensors are circularly tested under positive and negative stroke pressure for three times;

4. Comparing the outputs within compensation temperature range with that in 25°C    

5. Checking discrepancy in temperature circulation of -40 to +125℃ under zero output

6. Increase load resistance to reduce measurement errors;      

7. Between case and sensing element.


  • Company Name:Hefei WNK Smart Technology Co., Ltd
  • Add:4/F,Bldg #6, No.168, Xiangzhang Road, High-tech District, 230088, Hefei, Anhui province, China
  • Contacts:Ms. Echo Chen
  • Mob:+86-15956503046
  • Tel:
    +86-551-6536 9569
  • Email:echo@wnksensor.com