Gamma Vacuum maintains historical information on older controllers such as the DIGITEL 100, 500, and 1000. Contact us directly for available information including manuals and line drawings. For determining the pressure given by the front panel or serial outputs of controllers built before 1995, the following equation can be used:

Amps = Current reading in Amps
Number of Elements = 25L: N = 1, 60: N = 2, 120: N = 4, 220: N = 8

Individual Curves
Individual pump current vs. pressure curves are still available for Ultek, Perkin Elmer, and PHI ion pumps. Please contact Gamma Vacuum for availability.