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Question
what is the diffrence between mmwc and kg/cm2 for pressure 
measurment when we are using mmwc and when kg/cm2 and why?????
?? what is the reason
 Question Submitted By :: Instrumentation
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
when we r measuring very low pressure :: mmWC
and measuring high pr. :: kg/cm2/bar/psi... ok
for example we r measuring like boiler furnaces
pressure(draft) i.e very low pr.(250mmWC) so we r measuring
in mmWC, and when we r calibrating the transmitters (flow
and level) that time also we r calling transmitters range
also mmWC ok

here note the point is 10,000 mmWC = 1 Kg/cm2 then
1mmwc=0.0001kg/cm2 ok
 
Is This Answer Correct ?    350 Yes 28 No
Mail2noor.hyd
 
Answer
# 2
10000 mmwc equals to 1 kg/cm2.
For low ranges pressure is mentioned in MMWC otherwise in
any other pressure units.
 
Is This Answer Correct ?    126 Yes 15 No
Vaibhav V T
 
 
 
Answer
# 3
Mostly both are units of pressure. when we measure the very
low pressure than it is expressed in mmwc else higher
pressures are measured in kg/cm2. low pressure can also be
used for but the error in values will be more.
Basically 10000 mmwc is 1 kg/cm2 a.
 
Is This Answer Correct ?    74 Yes 10 No
Dhirendra
 
Answer
# 4
N/m2 is SI Unit and Kg(f)/cm2 is MKS Unit.

1 Kg/cm2 is 1.033 bar or 1.033x10^5 N/m2
10000 mmwc= 1 kg/cm2
 
Is This Answer Correct ?    69 Yes 10 No
Dilip
 
Answer
# 5
Mostly both are units of pressure. when we measure the very
low pressure than it is expressed in mmwc else higher
pressures are measured in kg/cm2. low pressure can also be
used for but the error in values will be more.
Basically 10000 mmwc is 1 kg/cm2 a.
 
Is This Answer Correct ?    16 Yes 3 No
Tapan Das
 
Answer
# 6
Mostly both are units of pressure. when we measure the very
low pressure than it is expressed in mmwc else higher
pressures are measured in kg/cm2. low pressure can also be
used for but the error in values will be more.
Basically 10000 mmwc is 1 kg/cm2 a.In thermal power plant mmwc is most useful in boiler side.
 
Is This Answer Correct ?    13 Yes 4 No
Prashant Meena
 
Answer
# 7
both r units for pressure,.but,mmwc(millimeter water column)is
very low pressure means less than zero.here, 10000mmwc=1kg/cm2.we may consider the mmwc as vaccum.
 
Is This Answer Correct ?    9 Yes 1 No
M.vijay Kumar
 
Answer
# 8
both r units of pressure itself..but when the system is in
vacuum then the pressure measured in mmwc and the positive
pressure measured by kg/cm2.so for low pressure mmwc used
and for high pressure kg/cm2 is used..
 
Is This Answer Correct ?    7 Yes 4 No
Chirag Darji
 
Answer
# 9
To measure low pressure we need to use this unit of
pressure Hence 10000mmwc=1kg/cm2
 
Is This Answer Correct ?    1 Yes 0 No
Md Tasleem Khan
 
Answer
# 10
MMWC (MILIMETR WATER COLOUM)IS A LOW PRESSURE MEASURING UNIT USE FOR LOW MEASURING AS GAS FLOW ETC AND ONE KG =10,000 MMWC.
MOSTLY USE IT INTO SAMPLE FLOW OF GASES IN ANALYSER AND FLOWMETER AND PREESURE SETTING of pressure switch also.
 
Is This Answer Correct ?    2 Yes 2 No
Rajeev Tyagii
 

 
 
 
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