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MDM290 Piezoresistive OEM Differential Pressure sensor
MDM290 Piezoresistive OEM Differential Pressure sensor

·Pressure range: 0kPa~35kPa…3.5MPa
·Constant current/ Constant Voltage power supply
·Isolated construction, possible to various fluid media
·OEM differential pressure sensor
·316L stainless steel
·High static pressure 20MPa
·1.5 times overpressure

Features

·Pressure range: 0kPa~35kPa…3.5MPa

·Constant current/ Constant Voltage power supply

·Isolated construction, possible to various fluid media

·OEM differential pressure sensor

·316L stainless steel

·High static pressure 20MPa

·1.5 times overpressure

 

Application

·Industrial process control           

·Differential pressure measurement            

·Gas, liquid pressure measure

·Pressure checking meter          

·Pressure calibrator                                  

·Ventura and eddy-current flow meter

 

Introduction

MDM290 piezoresistive differential pressure sensor is OEM differential pressure sensor with stainless steel isolated diaphragm. It has integrated construction, high static pressure, high stability and good reliability. The high and low pressure sides are protected by isolated diaphragm. It can be used for measuring corrosive and conductive fluid media. The measured differential pressure is transmitted onto the die through the diaphragm and filling silicon oil so that the sensor could measure differential pressure precisely. The pressure sensor is tested automatically, and compensated zero and temperature performance with provided resistors. The installation dimension is consistent with general products which makes the sensor has a good interchangeability. It is widely used for industrial process control and differential pressure measure fields, etc.

Baisic Specifications:

Item*

Min.

Typ.

Max.

Units

Linearity

 

±0.15

±0.25

%FS,BFSL

Repeatability

 

±0.05

±0.075

%FS

Hysteresis

 

±0.05

±0.075

%FS

Zero output

 

 

±3

mV DC

FS output

60

 

 

mV DC

Zero thermal error

 

±0.75

±1.0

%FS, @25℃

Span thermal error

 

±0.75

±1.0

%FS, @25℃

Compensated temp. range

0~50

Working temp. range

-40~125

Storage temp. range

-40~125

Long-term stability

 

±0.3

±0.5

%FS/year

*testing at basic condition


Electric Performance

Power supply: ≤2.0mA DC;≤10V DC

Electric connection: 100mm silicon rubber flexible wires

Common mode voltage input: 50% of input (typ.)

Input impedance: 3kΩ~8kΩ

Output impedance: 3.5kΩ~6kΩ

Response (10%~90%): <1ms

Insulation resistor: 100MΩ, 100VDC

Overpressure: refer to Order Guide

Max. static pressure: 20MPa

Zero drift/static pressure: ≤0.5mV/MPa


Construction Performance

Diaphragm: stainless steel 316L

Housing: stainless steel 316L

Pin: silicon rubber flexible wire

O-ring: Viton

Net weight: ~36g


Environment Condition

Shock: no change at 10gRMS,(20~2000)Hz

Impact: 100g, 11ms

Media compatibility: the gas or liquid which is compatible with stainless steel and Viton


Basic Condition

Media temperature: (25±1)℃

Environment temperature: (25±1)℃

Shock: 0.1g (1m/s2) Max.

Humidity: (50%±10%)RH

Local air pressure: (86~106)kPa

Power supply: (1.5±0.0015)mADC




Outline Construction: (Unit:mm)


The suggested installation dimension is Φ19 +0.05/+0.02 mm


Electronic Connection

electric connection for MDM290 differential pressure sensor

     

Note: The actual electric connection method, please check the parameter label enclosed with products.

1. The resistance bridge on the left of the dashed is sensor’s bridge circuit;

2.MDM290 sensor has no laser trimming board, it compensates zero and temperature drift by outer compensated resistors, the connection to see the above chart; connect zero trimming resistor R3(R4), the other R4(R3) is short circuit as negative power supply; R1 or R2 is zero temperature drift compensated resistor, only one of them is used, the other is open circuit, please select the right resistor according to the specification label enclosed with sensor; R5 is sensitivity temperature compensated resistor. We suggest that please connect the outer resistor and differential pressure sensor as close as possible.



Order Guide

MDM290

Piezoresistive OEM Differential Pressure Sensor

 

 

Range code

Pressure range

Range code

Pressure range

0A

0kPa~35kPa

09

0kPa~700kPa

02

0kPa~70kPa

10

0kPa~1000kPa

03

0kPa~100kPa

12

0MPa~2MPa

07

0kPa~200kPa

13

0MPa~3.5MPa

08

0kPa~350kPa

 

 

 

 

Code

Compensation

L

With compensated circuit board

 

M

Outer compensated resistor (providing resistor value)

 

 

Code

Electric connection

2

100mm silicon rubber flexible wires

 

 

    MDM290 12 M 2 the whole spec


Notes

1.Please notice that one side of the leading wire is High Pressure Side, the other is Low Pressure Side. Or identify High Pressure Side by mark “+”, and identify Low Pressure Side by mark “-“ carefully;

2.During application, please pay attention that the pressure of high pressure side should be higher than that of low pressure side;

3.Please pay attention to protect the diaphragm, prevent it from damaging;

4.Please do not pull or drag the 6 leading wires;

5.Temperature resistant range of standard Viton O-ring of sensor is -20℃~250℃. When working temperature is lower than -20℃, or sensor is applied in critical environment, please contact us.


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