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RH Systems designs and sells custom temperature and humidity solutions, including chilled hygrometers. Founded in 1998 by Bob Hardy, a 20 year veteran of the industry, RH Systems is a privately-held company headquartered in Gilbert, Arizona.

RH product line is jointly developed with our European partner, MBW, and manufactured in Switzerland and the United States. RH provide the design expertise in embedded control and automation, including touch screen, user interface and embedded firmware.

RH products are used in commercial laboratories and national metrology institutes around the world, and they are proud of the elite companies who have chosen their products.


HUMIDITY Metrology

373 Reference Chilled Mirror Hygrometer

  • Wide measuring range -95 to +95 ̊C frost/dew point
  • Dual mirror temperature sensors
  • Frost/Dew Point Accuracy: ≤ ± 0.1 °C 
  • High pressures up to 20000 kPa
  • Touch screen full color LCD user interface

473 Dew Point Hygrometer

  • Measuring range -20 to +70 ̊C frost/dew point
  • Frost/Dew Point Accuracy: ≤ ± 0.1 °C 
  • Cable mounted dew point and temperature measurement
  • Touch screen full color LCD user interface

573 Industrial Chilled Mirror Hygrometer

  • Wide measuring range -55 to +95 ̊C frost/dew point
  • Integral frost/dew point measuring head
  • Frost/Dew Point Accuracy: ≤ ± 0.1 °C 
  • Ice-Test user calibration verification
  • Touch screen full color LCD user interface

973 Economical Dew Point Mirror

  • Measuring range -50 to +20 ̊C frost/dew point
  • Integral frost/dew point measuring head
  • Frost/Dew Point Accuracy: ≤ ± 0.1 °C 
  • Ice-Test user calibration verification
  • Touch screen full color LCD user interface

SF6 Measurement

973-SF6 Analyzer

  • Best accuracy: Frost/Dew Point: ± 0.5°C , Volume SF6:  ± 0.5%, SO2: 2% of range
  • The 973-SF6 chilled mirror technology relies on the drift-free physical principles of condensation
  • Gas containment system with automatic pump back with No gas loss
  • User Verifiable Calibration
  • Lower Cost of Owner ship

Temperature Metrology

PT12 Precision Thermometer

  • Twelve channel temperature measurement
  • High precision, stability and repeatability
  • Internal temperature compensated high stability reference resistors
  • PC software for easy GUI or command line system control and data acquisition
  • Simple to setup, configure and use
  • Touchscreen user interface with graphing
  • Supports THERMOtelligent 100 Ω and 25.5 Ω Smart 4-wire PRTs