Home > Michell Instruments high-precision dew-point hygrometer helps reduce cost of annealing processes

Michell Instruments high-precision dew-point hygrometer helps reduce cost of annealing processes

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article image S8000 RS dew-point hygrometer
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AMS Instrumentation and Calibration  introduces the new S8000 RS high-precision dew-point hygrometer from Michell Instruments.
Michell’s S8000 RS high-precision dewpoint hygrometers enable furnace operators to achieve high standards of finishes and quality of metal products at lower annealing temperatures.
Since the moisture content of the furnace atmosphere needs to be continually monitored for best control, the hygrometer must be capable of showing changes accurately and quickly.
Michell’s S8000 RS uses the chilled-mirror technology, considered one of the most accurate and reliable methods to monitor dew-point because it measures the actual formation of moisture or frost on a temperature-controlled mirror, rather than relying on calculated values.
An advanced dual optics system detects minute changes in moisture condensed on the mirror surface, resulting in very high sensitivity (±0.01°C) when making measurements at low levels of moisture content. To ensure safe measurement in the high temperature environment, the sample gas is extracted from the furnace and passed through a cooling coil to bring it back down to ambient temperature.
Typically, the dew-point required for optimum performance in an annealing furnace is between -70°C and -50°C, depending on the type of metal being treated and the end results required. This is well within the range of the S8000 RS, which has a measurement range of -80°C (or -90°C, depending on the model) to +20°Cdp.
Key features of S8000 RS high-precision dew-point hygrometers:

  • Intuitive interface with user selectable measurement units
  • Three analogue outputs as standard
  • Internal data logging to an SD card
  • USB connection
  • Supplied with a traceable calibration as standard
  • Optional UKAS (United Kingdom Accreditation Service) accredited calibration also available

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