Why we use 250 ohm resistor in series with HART protocol communication?

13 Answers   Chemtrols, Instec, Sabic,

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what is the difference between mmhg & mmwc?. i want to calibrate a transmitter in the range of -100 to 300 mmwc. Which is the reference for calibrate the Tx,if mmwc not available?. Is it mmhg or mmho2?.

3 Answers   UPL,

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What is voltage regulator?

0 Answers  

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what is the Difference betwee the Hart and smart series Pressure transmitter

1 Answers   HPCL Mittal Pipelines Limited HMEL, Kastech Instrumentation,

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why we are using boosters at glass furnace is there any other thing?

1 Answers   CGL,

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What is glanding

1 Answers  

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why does mA signal preferred for signal transmission?

12 Answers   Emerson,

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What is diffrence between Transducer and Transmitter?

13 Answers   Ford,

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detail of mass flow meter pricipal

0 Answers  

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what is commissioning & pre commissioning , explain with difination

2 Answers   Bapco Bahrain Petroleum Company, Shell,

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plz exlain the dcs system of ABB sympony hamnony

1 Answers  

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Name four general (not technical) criteria that would you consider important, when deciding upon a particular control valve?

1 Answers  

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