MDM491 Piezoresistive Differential Transmitter Features ■Full stainless steel construction, compact size, easy installation; ■Welding and full-sealed construction; housing protection IP65; ■Using piezoresistive differential pressure sensor, 316L isolated diaphragm; ■Temperature compensation and aging, stable performance; ■Zero and span adjustable outside for plug connection version. Introduction MDM491 Piezoresistive Differential Pressure Transmitter is a compact full-welded (no sealed ring) differential measurement element. Silicon oil is filled in between die and two diaphragms, when the measured differential pressure is added on two diaphragms, 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 output signal from Weston Bridge on the sensing die has a good linear relationship with differential pressure, so the measured differential pressure could be measured precisely. The whole product is used for differential pressure measurement of various gases and liquids in pipeline in many fields including petroleum, chemi-industry, power station and hydrology, etc. Specification MICRO SENSOR CO.,LTD

MDM491 Piezoresistive Differential Transmitter Electric Characteristic Power Supply:15V~28V DC Output Signal: 4mA~20mA DC(2-wire); 0V/1V~5V/10V DC, 0mA~10mA/20mA DC(3-wire) Electric Connection: plug or cable Response Time:(10%~90%): <1ms Insulation Resistance: 100MQ, 50VDC Construction Material Housing: SS 1Cr18Ni9Ti Diaphragm: SS 316L Filled liquid: silicon oil Environment Condition Shock Effect: <±1% at 3gRMS, 30Hz~2000Hz Impact: <1% at 100g, 10ms Media: liquid or gas which is compatible with construction material Outline Construction and Dimension(cable connection) Plug Outline Construction...

MDM491 Piezoresistive Differential Transmitter Cable Connection: Electric Connection Plug Connection: Code E F J Q U V Code Others M3 31 LCD digital indicator (only 4~20mADC) MICRO SENSOR CO.,LTD http ://www.micro sensor. cn Add: No.l8,YingdaRoadBaoji,P.R.China, 721006 Tel: 0917-3600901 3600902 3600903 Fax: 0917-3600755

MDM491 Piezoresistive Differential Transmitter Order Note: 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.Digital indicator information, please refer to MPM480 datasheet; 5. If the user has special requirement, please feel free to...