PENNINGVAC Sensors PR 25 / PR 26 / PR 27 / PR 28 Scroll Down PENNINGVAC PR 25 PENNINGVAC PR 26 PENNINGVAC PR 27 Replacement anode ring PENNINGVAC PR 25, 26, 27, 28 / PTR 225, 237 PENNINGVAC PR 28 - bakeable Replacement cathode plates PENNINGVAC PR 25, 26, 27, 28 / PTR 225, 237 Download Brochure back to THERMOVAC Sensors next to Connecting Cables for Passive Sensors