Servomex - a Spectris Company

- Model DF-740 - DF High Purity Gas Analyzers



Tunable Diode Laser (TDL) trace moisture measurements, suitable for quality control of electronic grade ammonia gas production in LED plants. The DF-740 is designed specifically to monitor trace levels of moisture in electronics-grade ammonia. Servomex's industry-leading TDL sensing technology and robust Herriot Cell enables an exceptionally broad measurement range of 10ppb-10ppm. By ensuring moisture only comes into contact with minimal optical components, the DF-740's performance is unaffected by loss in mirror reflectivity - ensuring a fast response measurement that is stable, accurate and consistent.

This device is designed for long term unattended operation, delivering considerable cost-savings. The high stability optical TDL technology requires minimal ongoing maintenance, with zero drift enabling greatly extended calibration intervals. The combination of high performance, ultra-stable measurements and affordability make the DF-740 an attractive solution for electrograde NH3 quality checking applications.

  • Trace level Tunable Diode Laser (TDL) sensing provides high stability measurements through minimal moisture contact with optical elements
  • Broad detection range: 1ppb – 10ppm
  • Operable via front panel or digital communication options
Easy to use
  • Simplified ongoing maintenance requirements with no consumables required
  • High reliability; repeatable baseline measurements are not affected by a loss in mirror reflectivity
  • Designed for long term unattended operation with minimal maintenance needs
Low cost of ownership
  • Maintenance periods extended by the use of patented ultra-stable, TDL sensing technology
  • Zero drift reduces calibration requirements
Unrivalled performance
  • Analysis immune from gas cell concentration: DF-740 operates to specification with up to 90% signal loss
  • 10ppb Lower Detection Limit (LDL)
  • Manufactured by Servomex - over 60 years’ experience innovating gas analysis with thousands of units used in the field
Benchmark compliance
  • IEC 61010-1 
  • Overvoltage Category II, Pollution Degree 2 
  • EU EMC Directive 
  • EU Low Voltage Directive

  • 483mm (19”) Wide x 266mm (10.5”) High x 608mm (23.9”) Deep
  • 31.8kg (70lbs)
  • IEC 61010-1 
  • Overvoltage Category II, Pollution Degree 2 
  • EU EMC Directive 
  • EU Low Voltage Directive

  • Trace NH3 analysis for quality control of electronics-grade bulk gases used in LED production
  • Trace NH3 analysis for leak detection of electronics-grade bulk gases used in LED production

Ensure your DF-740 NanoTrace moisture 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.

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