Why the Proximitor supply should be Negative voltage? Why should not we give Positive voltage to the Transducer?

6 Answers   Moser Baer,

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What is principle of ultrasonic level transmitter?

3 Answers  

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thru which signal does µP communicate with memory

3 Answers  

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How a oxygen sensor & analyzer work at boiler or furnace, what’s the principle & science is beyond this, How O2 sensor scene & convert signal & move toward analyzer & analyzer show reading in percent?

1 Answers   GS Engineering Construction, KNIC,

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hi... i'm about to learn siemens plc i came across following question in my mind ... plr ans 1. hw motor operated by plc 2. hw drive operated by plc explain dis by both ladder logic diagram and hardware config , connection

2 Answers   KCP Cements,

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which is type of thermocouple is used to measure 1000deg?

9 Answers  

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hey any one got the papers of SAIL and HPCL plz do help me by posting them to my mail ID's naren07_87@yaho.co.in, surenarendra@gmail.com

0 Answers  

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what is hall effect?where it is use in power plant?

2 Answers  

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how the flow rate is measured from a pipe with the help of pressure?

1 Answers  

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which type signal come control valve

6 Answers  

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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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what are the installation requirement is common to all flow meter when volumetric flow rate is being measured

1 Answers  

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