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Key features
  • Ultra-trace Coulometric sensing is ideal for upset prone applications and compensates for sample and flow rate fluctuations
  • Monitors multiple background gases with a single unit
  • Low detection limit capabilities: 200ppt Lower Detection Level (LDL)
  • Flexible configuration options: initiation via front panel/digital interconnect
Easy to use
Low cost of ownership
Unrivalled performance
Benchmark compliance

The DF-550E is designed to deliver ultra-trace measurements of O2 as a contaminant in ultra-high purity electronic gases. With the highly sensitive 200 ppt LDL delivering superior analytical headroom, the DF-550E’s fast response provides sensitive and dependable process monitoring.

Suitable for use with multiple background gases, the DF-550E is unaffected by sample and flow rate changes, making it ideal for upset prone conditions. Portability is optimized via a hand carry portable option and compact calibration system which can be integrated into the rear of the unit, optimizing device portability.

In addition to its performance and flexible use, the DF-550E minimizes ongoing monitoring costs. The non-depleting nature of our Coulometric sensing technology means the only ongoing maintenance requirement is an annual SPAN calibration, with no programmable cell replacement needed. 

  • 309mm (12.1”) Wide x 226 (8.8”) High x 253mm (9.9”) Deep
  • 8.2kg (18lbs)
  • IEC 61010-1 
  • Overvoltage Category II, Pollution Degree 2 
  • EU EMC Directive 
  • EU Low Voltage Directive 

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Key Applications
  • Quality control checks for electronics grade gases 
  • Leak detection for electronics grade gases 
Service and Spares

Ensure your DF-550E ultra-trace oxygen analyzer delivers optimum performance with Servomex Service Network.

Through our global network of engineers and service centers, we provide complete lifetime support for your analyzer. Our services range from installation and commissioning to supplying high quality spares and arranging scheduled servicing: visit our Service Network pages to find out more.

Spares lists for the DF-550E are available by clicking on the Downloads tab.

Global Service Network