"The most comprehensive source for Automotive Tools & Equipment" Dial-A-Charge Charging Cylinders Calibrated shrouds make accurate charging simple and the charge is measured by weight for greatest accuracy. Using the calibrations in conjunction with the pressure gauge, you can easily compensate for volume fluctuations that occur as the ambient temperature changes just by "re-dialing" the shroud. Heated cylinders help speed the transfer of refrigerant by overcoming the equalization of pressure between the system and the charging cylinder. This reduces the time required for a complete charge. Charges by volume; calibrations on the shroud make it easy to charge the exact amount required. Comes in durable polyethylene case for protection during storage and transit. Cylinder snaps in and out of the case and can be stored either vertically or horizontally. For safety, all cylinders come with pressure relief valves; they automatically reset when a save working pressure is restored. Here's how the Dial-A-charge makes charging fast and accurate. Accurate - Sightglass lets you see the level of refrigerant in the cylinder, and shrouds are clearly calibrated for specific refrigerants. Economical - Cylinder is filled from an economical bulk tank; accurate charging eliminates call backs caused by under or over-charging. Easy to Use - Read pressures on the top gauge, then rotate the shroud to the corresponding pressure to get direct measurement. Place the O-ring at the desired charge and open the valve until refrigerant level in the sightglass reaches the O-ring. R-134a MODELS   Heated   Capacity 110V Graduations 2-1/2 lb 1100 gram 1/4" SAE Fittings 43134B 1 oz. 25 g 5 lb 2200 gram 1/4" SAE Fittings 43534B 1 oz. 25 g 5 lb. 2200 ACME Fittings 34205A 1 oz. 25 g For automotive applications, order a Dial-A-Charge With Acme fittings. R-12, R-22, R-502 MODELS - 1/4" SAE FITTINGS   Heated Capacity 110V 220V Graduations 2-1/2 lb 43299B NA 1 oz. 1100 gram NA 20346B* 25 g 5 lb 43678B NA 1 oz. * CE Approved Related "Robinair" Product Information General AC Accessories - Index Page Full Product Listing - Index Page