Why plc require in analog input 4-20amp & 0-10 volt?


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what is moisture probe? What are there types? What is there working principle and how they works? guys this is one of technical question I had ask in interview. If you know its answer please let me know. The interviewers were more interested in microwave moisture probe, so if you find its any link please just forward me on my mail id.avinash1200@gmail.com Thanks in advance.

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Yokogawa mass flow meter shows negative reading...what r the main causes for this problem?...

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what is thermopile?

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3. Differentiate between ultrasonic flowmeter and radar type flow meter.

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what is mean by process control?

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