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WA19 Diezoresistive Silicon Oil Filled Analog Pressure Sensor

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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- Linearity¹		40Kpa		±0.20	±0.30
Non- Linearity¹		>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- Linearity¹	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.

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