1.Quickly&automatically determines the weight concentrations of R12, R134a, R22, hydrocarbons and air. 2.Easy&profitable to ... (NDIR) technology to determine the weight concentrations of R12, R134a, R22, hydrocarbons and air."Blend-ID" analytical software identifies ... Digital display and LEDs, Optional printer module (Internal)Refrigerant : R12, R134a, R22, HC, and EPA S.N.A.P. approved blendsDisplay ...