MSA ULTIMA X5000 Gas Monitor
MSA ULTIMA X5000 Gas Monitor Sensor Missing
The gas monitor sensor is no longer detected, causing the instrument to fault and stop reading.
- Code
- Sensor Missing
- Name
- Sensor Missing
- Controller
- MSA ULTIMA X5000 Gas Monitor
- Type
- Sensor open circuit
- 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 Sensor Missing mean?
The gas monitor sensor is no longer detected, causing the instrument to fault and stop reading.
Is MSA ULTIMA X5000 Gas Monitor Sensor Missing 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 Sensor Missing?
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
EEPROM Fault · EEPROM FaultChannel Error · Channel ErrorUnknown Error · Unknown ErrorNegative Drift · Negative DriftBeads Off Fault · Beads Off FaultSensor RAM Error · Sensor RAM ErrorReference Failure · Reference FailureTEDS CRC-16 Error · TEDS CRC-16 ErrorLow Signal Failure · Low Signal FailureRAM Checksum Fault · RAM Checksum Fault
All 39 MSA ULTIMA X5000 Gas Monitor codes · Every fault code