We have a variety of Bayard-Alpert, Broad Range, and Triode style glass enveloped ionization gauges that are identical or equivalent to the AMAT, Axcelis, Novellus, Agilent, MRC, Ulvac, and MKS gauges. Our ionization gauges are available in single iridium or twin tungsten filaments and in 1”, ¾”, and .709” Pyrex glass or Kovar tubulation with optional flanges for Kovar tubulated gauges. See our cross reference and pricing information. See our Bayard Alpert Ionization Gauge Cross Reference Guide.