Checking the A/C 134a

So is this all I need to check the freon level in a 134a Miata??
http://www.toolweb.com/pics/INDGEZ-1.jpg

It isnt very accurate but yeah.

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Originally Posted by Majik

It isnt very accurate but yeah.

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Any better method??

pos They have a kit at Autozone that comes with a good gauge freon and a can of oil for the system. About 28.00 I think. I have one. It works great. You can borrow mine if you want and just buy some freon if you need it. I'll even bring it to you....Tomorrow

Quote:

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Originally Posted by riverracer

pos They have a kit at Autozone that comes with a good gauge freon and a can of oil for the system. About 28.00 I think. I have one. It works great. You can borrow mine if you want and just buy some freon if you need it. I'll even bring it to you....Tomorrow

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Well I need to pay better attention to my posts! ::Clown::

So since you have checked your A/C can you give me an How-To overview???