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About $1200 Bacharach GA500 plus. Any shop you take your pruis to for air conditioning work will use a refrigerant analyzer first to test your gas to see if someone install contaminated gas or other gas. If a repair shop dose not have one turn around and leave, that is not a repair shop just because they have a sign hung up over the door. I burn up 2 a year, I use them a lot a vary lot. This test instrument will tell you what shop are naughty and witch ones are nice, and save a TECH from trying to diagnose a wrong part because the last shop had 16% air in the A/C system refrigerant!!! In this case i'm in a body shop and I test every car first before I reclaim the refrigerant. I weigh it for the EPA papers and to tell if the A/C system was in good working order before the shop works in the car. In this case the car only had 320g of refrigerant it should have when full 720g and 16% air mixed init to. Of coerce the customer said the A/C works great!? ( NOT!!!!) Yea it will work great after I recharge it.