MSA ULTIMA X5000 Gas Monitor
MSA ULTIMA X5000 Gas Monitor Diffusion Supervision Fault
The gas monitor sensor has detected a blockage in the gas path, causing the instrument to fault.
- Code
- Diffusion Supervision Fault
- Name
- Diffusion Supervision Fault
- Controller
- MSA ULTIMA X5000 Gas Monitor
- Type
- Sensor fault
- What it does
- Fault: the equipment trips and stops
- Risk
- YELLOW Booth plays by its own rules
- Reset
- Clears on its own when the condition goes away
- Source
- The manufacturer's manual (subscribers see which manual and page)
Updated November 4, 2026
How to fix it
Subscribers get:
- What to do next, in plain words
- What the manual says to do, and the page it is on
- The step by step check for this problem, one check at a time
- Booking a live video call with Ben, a master booth technician ($250/hr, paid per call)
Questions about this code
What does MSA ULTIMA X5000 Gas Monitor Diffusion Supervision Fault mean?
The gas monitor sensor has detected a blockage in the gas path, causing the instrument to fault.
Is MSA ULTIMA X5000 Gas Monitor Diffusion Supervision Fault dangerous?
It is graded yellow: not hard, but a booth does it differently than the gear most techs know, so follow the checks in order.
How do I fix MSA ULTIMA X5000 Gas Monitor Diffusion Supervision Fault?
The manual's fix and the step by step check for this code are in WERCS Diagnose, plans from $49 a month. For help right now, WERCS answers 24/7 at (877) 489-3727.
Other MSA ULTIMA X5000 Gas Monitor codes
Zero Calibration Fault · Zero Calibration FaultParameter Fault (Sensor) · Parameter Fault (Sensor)Sensor End of Life Fault · Sensor End of Life FaultSensor Configuration Reset · Sensor Configuration ResetSensor Supply Voltage Fault · Sensor Supply Voltage FaultExternal Memory Access Error · External Memory Access ErrorBoth side green LEDs blinking · Gas value is still shown.External Memory Checksum Error · External Memory Checksum Error
All 39 MSA ULTIMA X5000 Gas Monitor codes · Every fault code