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.

Servomex lists the legacy 04900 / Xentra / SERVOPRO 4900 as obsolete and separately lists the 4900 Multigas product. This does not mean all analyzers named 4900 are obsolete.

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.

4900 alarm archive — verify generation applicability

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.