DF-745 NanoTrace

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The DF-745 provides trace and ultra-trace moisture contaminant measurements for LED/LCD manufacturing processes. Able to monitor multiple background gases, the DF-745 delivers exceptional performance operational flexibility in a compact unit.

With an intelligent and robust hardware/software design, this analyzer can be moved easily from port to port, virtually eliminating dry down times often associated with these applications. 

Offering a Lower Detection Limit (LDL) of 2ppb, the DF-745 uses industry-leading Tunable Diode Laser (TDL) sensing technology. This sensor delivers ultra-reliable baseline measurements and a fast speed of response; with a robust Herriot cell preventing loss in mirror reflectivity, moisture contact with optical components is minimized, ensuring an accurate measurement. Added to its flexibility and accuracy is affordability; zero drift extends calibration intervals while minimal ongoing maintenance provides a low cost of lifetime ownership. 

Tunable Diode Laser (TDL) trace/ultra-trace moisture measurements for ultra high purity electronic gas checks

Gas: H2O

Measures: ppm, ppb and ppt

Application: Quality Control

Sensing Technology: Laser Moisture


  • Bulk gas quality control checks for ultra high purity electrograde gas production in LED plant applications 
  • Leak detection in LED and LCD plant applications 


  • Trace level Tunable Diode Laser (TDL) sensing provides high stability measurements 
  • Broad detection range: 0ppb – 20ppm 
  • 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 
  • Compact with a low weight; moves easily from port to port and ideal for other mobile applications 

Low cost of ownership

  • Maintenance periods can be extended by the use of patented ultra-stable TDL sensing technology 
  • Zero drift reduces calibration requirements 

Unrivalled performance

  • Uses industry-leading, high stability TDL sensing technology 
  • Analysis immune from gas cell concentration: DF-745 operates to specification with up to 90% signal loss 
  • LDL reference 2ppb 
  • Manufactured by Servomex - over 60 years’ experience innovating and pioneering gas analysis and thousands of units used in the field every year 

Benchmark compliance

  • IEC 61010-1 
  • Overvoltage Category II, Pollution Degree 2 
  • EU EMC Directive 
  • EU Low Voltage Directive


  • 19 inch (48.3cm) Wide x 
  • 10.5 inch (26.7cm) High x 
  • 22.5 inch (57.2cm) Deep


  • <31.8kg (70lbs)


  • IEC 61010-1 
  • Overvoltage Category II, Pollution Degree 2 
  • EU EMC Directive 
  • EU Low Voltage Directive


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