pressure in the space

[arava prakash]

what is pressure in the space and in the vacuum chamber

 

[ravindragudi]

The pressure in the space varies with altitude. Refer to the link http://www.eoearth.org/view/article/171011/ and scoll down to the table 'pressure profile of the atmosphere'. At sea level the pressure is 1 atm. which is 1013.25 mbar.
The pressure in the vacuum chamber depends on how good is the connected vacuum pump. Some cases it can effectively reach up to 1 mbar.

 

[FvM]

what is pressure in the space and in the vacuum chamber

Depends on the vacuum chamber. See the table in the link for a rough idea about pressure ranges.
https://en.wikipedia.org/wiki/Vacuum#Measurement

Some cases it can effectively reach up to 1 mbar.

Turbopumps achieve vacuum down to 10e-8 Pa (= 10e-10 mBar). https://en.wikipedia.org/wiki/Turbomolecular_pump

 

[albbg]

I think with "space" you meant "outer space" where the pressure is close to 0. However here you can find a quite exhaustive table:

https://www.orbitec.com/documents/Orbitec_Vacuum_Reference.pdf

 

[RajivConfident]

I don't think the pressure is zero outer the space.In outer space there is non zero gravity so there may be some pressure.