• English
  • German

973S Dew Point Mirror


The full featured 973 with integrated sample pump, external temperature measurement and transport case. For many years this was the standard version, hence the 973S designation. As a transfer standard, it remains a popular option thanks the high stability of the integrated measuring head, integrated 0.1% pressure sensor, and high precision temperature measurement to enable calculation of relative humidity.


  • Fundamental drift free humidity measurement
  • Integral frost/dew point measuring head
  • Internal sample pump
  • Optimal Response Injection System for fast measurement
  • Electronic flow measurement
  • Intuitive, easy to use LCD touch screen user interface

Key Specifications

  • Frost/dew point range: -60 to +20 ̊C
  • Calibrated frost/dew point range: -50 to +20 ̊C
  • Pressure up to 2.5 bar
  • Temperature: -50 to +100 ̊C

Typical Applications

  • Transfer standard for industrial applications
  • Checking breathing gas quality
  • Battery manufacturing
  • Heat treatment
  • Validation of production and storage conditions
  • Dryer performance validation