Answer / sreenivasulu

wheat stone bridge is used for measuring resistance and
pirani gauges are used for measuring small pressures and
strain gauge is depends on the principle of when strain is
applied to conductor the length increases and resistance
increases

Answer / www.islamqa.com

wheatstone bridge used in many circuits for variety of
purposes , it's main idea is to change 1 resistor of 4
resistors and get this resistance change in form of voltage
change.

Strain gauge is a "pressure sensitive resistance" which
attached to the wheatstone bridge to consist "pressure
transmitter"/pressure monitoring system.

R chnage by pressure as R=L*(ROH)/A , L:LENGTH and A:AREA
are changing by pressure , this leads to R change.

Answer / priya

pirani gauge is explained with the help of wheatstone
bridge circuit.temperature variation is caused by the
resistance changes in case of pirani gauge

Answer / malhotra g singh

WHEATSTONE BRIDGE IS INVENTED BY WHEATSTONE.PIRANI GAUGE
AND STRAIN GAUGE ARE INVENTED BY PIRANI AND STRAIN
RESPECTIVELY.WHEATSTONE BRIDGE IS A BRIDGE WHEREAS PIRANI
GAUGE AND STRAIN GAUGE ARE GAUGES.

If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , then it will reaches again 50%, this type of action occured frequntly.. so what to do for solve this problem. The possible cause is in volume booster or positioner's relay.. positioner is double acting .. and make siemens..sipart.The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?

2 Answers   Gujarat Fluorochemicals Limited (GFL), Shell,

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why we use the 4-20 mamp signal used for transmitter.

5 Answers   Tecnimont,

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I am new in work for 1 of our project we have some instrument in BOM including Pressure, Temp. and so on, I also noticed some objects like pressure switch process HOOK UP; which I don't know what does "HOOK UP" mean here.

3 Answers  

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what master plc do?

2 Answers   ISRO, Yokogawa,

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what is the meaning of reverse action and forward action of control valve...

9 Answers   Honeywell, Yokogawa,

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In case of Transmitter's(e.g.Ultrasonic Flow meter ) we have an normal practise of selction of upstream and downstream distance such as (20D and 5D ).can anyone please let me know whow to calculate "D" ?? i guess it refers to pipe thickness is t right ?

2 Answers  

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installation process of orifice,a question asked for confusion creation in interview by BARC 1.if orifice is tightly fitted with pipe ,it will act like venturi 2.if orifice is left hanging in between liquid it will not create the pressure difference exactly,

0 Answers   BARC,

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what is the current pay package for an instrumentation engineer having 2 years of experience in cryogenic technology???????

1 Answers  

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what is the formula for changing Range of Transmitter from X mmwc to some Y mmwc with respect to DCS NCMH flow range from x NCMH to y NCMH?

1 Answers   HCL,

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How to calibrate level transmitter with use of HART?

0 Answers   Samsung,

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What is the difference between HMI and SCADA?

2 Answers  

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How to convert 4 wire level transmitter connection to 2 wire.

2 Answers  

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