MDM490 Piezoresistive Differential Pressure Transmitter

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MDM490 Piezoresistive Differential Pressure Transmitter

Product catalog summary

Features

Constructed entirely from stainless steel, the MDM490 is compact and easy to install.
It features laser welding and a fully sealed design with IP65 protection.
Utilizes a piezoresistive differential pressure sensor with a 316L isolated diaphragm.
Offers temperature compensation and aging for stable performance.
Zero and span adjustments are accessible externally.
Ex-proof version complies with GB3836.4 ExiaⅡ CT6 Ga standard and has an approved ex-proof certificate.
Certified for ship use according to CCS Rules of Classification of Sea-going Steel Ships (2006).
Holds CE and ROHS certifications.

Introduction

The MDM490 employs a piezoresistive differential pressure sensor as its sensing element. Silicon oil is used between the die and diaphragms to transfer pressure to the die, which is then converted into an electrical signal. This transmitter is suitable for differential pressure measurement in industries such as petroleum, chemical, power stations, and hydrology.

Specifications

Measurement ranges vary from 0-35 kPa to 0-3.5 MPa, with corresponding overpressure limits.
Maximum static pressure is ≤20MPa.
Accuracy ranges from 0.25% to 0.5% FS depending on the pressure range.
Thermal error and stability specifications are provided for different pressure ranges.
Compensation temperature is 0-50°C, with operational and storage temperature ranges specified.

Electrical Characteristics

Power supply options include 2-wire and 3-wire configurations with 15-28VDC.
Output signals include 4-20mADC, 0/1-5VDC, and 0-10/20mADC.
Response time is ≤1ms, with an insulation resistor of 100MΩ at 50VDC.

Construction Material

Housing is made from stainless steel 1Cr18Ni9Ti, diaphragm from stainless steel 316L, and O-ring from Viton.
Filled with silicon oil and features a G1/4 female pressure port.

Environmental Conditions

Shock effect is ≤1% at 3gRMS, 30-2000Hz, and impact is ≤1% at 100g, 10ms.
Designed for a lifetime of 1×10⁸ pressure cycles.
Compatible with media that do not react with construction materials.

Order Guide

Includes codes for pressure range, output signal, construction material, and additional options such as plug or cable connection, digital indicators, and intrinsic safety.

Notes

Installation of a tri-valve is recommended to protect the transmitter.
Pressure ports should be horizontal to minimize installation effects.
Static pressure should not exceed 20MPa, and the transmitter should operate within rated pressure ranges.
Special requirements can be discussed with the manufacturer.

Catalog excerpts

MDM490 Piezoresistive Differential Pressure Transmitter-1

MICROSGNSOR MDM490 Piezoresistive Differential Pressure Transmitter(V2.0) MICROSGNSOR MDM490 Piezoresistive Differential Pressure Transmitter(V2.0) MDM490 Piezoresistive Differential Pressure Transmitter Features . Full stainless steel construction, compact size, easy installation; • Laser welding, full-sealed construction; protection IP65; * Using piezoresistive differential pressure sensor, 316L isolated diaphragm; • Temperature compensation and aging, stable performance; • Zero and span adjustable outside; • Ex-proof version MDM490 conforms to GB3836.4 Exia II CT6 Ga standard; ex-proof certificate is approved; • Ship-use product conforms to CCS Rules of Classification of Sea-going Steel Ships (2006) ; ship-use certificate is approved; • CE and ROHS certificates Introduction MDM490 uses piezoresistive differential pressure sensor as sensing element. Silicon oil is filled in between die and two diaphragms, when measured differential pressure is added on two diaphragm, the pressure could be transferred onto die through silicon oil. Sensor die connects with amplifier circuit through wires, using semi-conductor's piezoresistive effect, transforming differential pressure signal into electric signal. The whole product is used for differential pressure measurement of petroleum, chemi-industry, power station and hydrology, etc. Specification MICRO SENSOR CO.,LTD

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MDM490 Piezoresistive Differential Pressure Transmitter-2

MDM490 Piezoresistive Differential Pressure Transmitter(V2.0) Compensation temp. Operation temp. Storage temp. Electric Characteristic Power supply: 2-wire 15～28VDC 3-wire 15～28VDC Output signal: 2-wire 4～20mADC 3-wire 0/1～5VDC，0～10/20mADC Electric connection: plug connection or Φ7.2mm 7-pin cable Response time（10%～90%）: ≤1ms Insulation resistor: 100MΩ，50VDC Construction Material Housing: stainless steel 1Cr18Ni9Ti Diaphragm: stainless steel 316L O-ring: Viton Filled liquid: silicon oil Pressure port: G1/4 female Environment Condition Shock effect: ≤1% at 3gRMS, 30～2000Hz Impact: ≤1% at 100g,...

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MDM490 Piezoresistive Differential Pressure Transmitter-3

MICROSGNSOR MDM490 Piezoresistive Differential Pressure Transmitter(V2.0) MDM490 Piezoresistive Differential Pressure Transmitter C4B2 the whole spec Notes 1. We suggest to install tri-valve between the measured point and transmitter to protect the media adding on transmitter’s positive and negative cavities slowly; 2. We suggest to make two pressure ports horizontally to reduce installation direction effect; 3. Please pay attention that the static pressure should be less than 20Mpa, transmitter positive and negative cavity should be in the rating pressure range; 4. Please note ex-proof, M3...

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