Servomex 4900 — Multigas Process Analyzer
Model reference for the legacy 04900 / Xentra / SERVOPRO 4900 and the separately identified SERVOPRO 4900 Multigas. Check the nameplate and manual generation before using specifications or service instructions.
Measurement technologies
For the paramagnetic O₂ channel, oxygen is attracted into a magnetic field; the magnetodynamic cell uses feedback to measure the resulting displacement. Other fitted gas channels use their specified infrared technologies. Channel and communications options are generation-specific.
Sample conditions
Use the matched manual to establish sample pressure, flow, temperature and conditioning requirements. Protect the measurement system from condensate and contamination. Background-gas effects must be assessed for the installed O₂ channel and mixture; a universal correction is not provided here.
Calibration and maintenance
Use gas standards and procedures matched to the fitted channels and generation. The legacy 04900001B manual does not establish procedures for a newer 4900 Multigas unit.
The former daily/weekly/monthly/annual schedule and fault-frequency ranking were not supported by the cited configuration evidence and have been removed. Set service intervals from the applicable manual and operating conditions.
Documentation limits
The full current-generation manual and applicable background-gas correction data have not been validated for this page. Confirm those details before applying numerical limits or service procedures.
Discussion
Share Servomex 4900 field experience, calibration issues, sensor failures, and plant-specific fixes. (Requires GitHub login.)
Technical references
Updated against manufacturer documentation. Match the document to the installed model and options.
- Servomex: 04900 / Xentra / SERVOPRO 4900 — Legacy product lifecycle notice; undated.
- Servomex: SERVOPRO 4900 user manual — 04900001B, Rev 4; legacy generation only.
- Servomex: SERVOPRO 4900 Multigas — Current product overview; undated; accessed 3 October 2026.
- Servomex: Paramagnetic oxygen analyzer technology — Manufacturer principle overview; undated.