Leybold Vakuum PR26 vacuum sensor

Leybold PR‑26 is a PenningVac cold‑cathode ionization pressure sensor with a DN 40 KF flange, measuring 10⁻² to 10⁻⁹ mbar. Common failure modes include cathode plate erosion or contamination causing drift or loss of sensitivity, air‑burst damage to the gauge head, and power supply voltage sag leading to intermittent readings. First‑check diagnostics: verify the sensor’s power input (±12 V DC) and grounding; inspect for visible cracks, debris, or oil on the KF flange and cathode plate; review any error codes or warning flags from the host controller and confirm calibration status against a traceable reference gauge.[oss-gpt-20b] Post Comment

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