So I'm a first year apprentice and I'm having a tough time with knowing the difference between AI, AO, DI, DO. I'm having a hard time understanding what devices are which and why. Can someone explain this to me?

2 Answers  

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what do you mean by smart instruments?explain with example

4 Answers  

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why we are using negative range like -750 to 0 mmwc in closed tank?and what is the reason can you explain clear?

2 Answers   Aarvi Encon,

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how to check thermocouple ,its working or not?

14 Answers   Coca Cola, Ford, Honeywell,

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calculate the rane of level use of this values, h=3 meter density=0.9 , whats the rang?

2 Answers  

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What are the uses of orifice plates?

0 Answers  

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who discoverd ohms law?

6 Answers   HPCL, Patni,

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What are different types of orifice plates?

0 Answers  

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Sir, I want junior executive, Instrumentation question papaer for IOCL, Plz send to arabinda.ghosh83@gmail.com

0 Answers   IOCL,

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WHAT REASEAN USE TRANSMETER TWO WIRE & FOUR WIRE

5 Answers   Kentz,

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in split range control system we are using two control valves,but we have only one positioner and one feed back link.so how we use this one feed back link for two control valves?

2 Answers  

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Can we use twisted pair cable instead of ethernet for communication?

1 Answers   Yokogawa,

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