Are you wondering about inventory control??
If so I know several things dealers have done in the past to solve the problem:
1) Sell the entire tank to the service department at a wholesale price and let them charge out the refrigerant as it is used.
2) You'll never be short inventory if you charge out capacity on every AC repair. Make sure to bill it out as "recycled refrigerant."
3) Have the techs check out/in the recycling machine from the parts department, don't leave it in the shop.
4) One shop I know of had the HVAC techs stall next to the parts department. They had an electrician wire an outlet to a switch inside the parts department. When the tech needed to use the recycler he would have to have parts turn it on for him. The tech didn't mind because he realized he was always forgeting to have the freon/R134a charged out. The parts department would just ask "what R.O.?" when turning on the switch.
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** Rob, Editor WD&S **Help is only a message post away!
robc@dealersedge.com