why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything

19 Answers   Honeywell, TCS, TN,

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how in the 2 - wire transmitter, 24v supply and the 4ma signal gets in the same path?

1 Answers   Yokogawa,

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How can I make calculation for Install level transmitter (DP) for open tank and cloes tank?

1 Answers   Petrofac,

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Induction type 1-p wattmeter reads ….. a) true value b) apparent value c)volt ampere value

3 Answers   Engineers India Limited,

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what is the principle of ultrasonic flowmwter and radar type flowmeter?

4 Answers  

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What is the difference between working pressure and calibration pressure of a control valve

0 Answers  

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control panel design guidelines

0 Answers  

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Lux meter is the measuring device to measure the lux level of lighting fixture. in industrial sector two types of lighting fixture is being used as street lighting purpose 1. HPSV (Sodium) and 2. HPMV (Mercury). HPMV having white light which is an combination of red, blue and yellow colour, while HPSV haivng Yellow lighting. in HPSV red & blue colour will be absent. during measurement of the lux level of HPSV and HPMV fixture. 1. Lux meter can measure the actual lux level of both fixture? 2. or it will show false reading for HPSV fixture light as it has only yellow light present. please give me answer

0 Answers   Ace Info,

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How to check loadcell working or notworking

2 Answers  

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what is the reset offset and control system in instrumentation

0 Answers   ABB,

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i have an interview in Qatar Petroleum. So please provide the all details abt fire & gas systems

1 Answers   Qatar Petroleums,

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i need some objective type questions in instrumentation

0 Answers  

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