Thunder Scientific 2900 Humidity Generator

Thunder humidity generators have set the standard for humidity calibration for over 25 years.  Its classic design, quality manufacturing and innovative application of fundamental metrology has enabled a step forward in humidity measurement precision.

The Model 2900 Humidity Generation System is a self-contained system capable of producing atmospheres of known humidity using the fundamental “two-pressure” principle. This system is capable of continuously supplying relative humidity, dew point, frost point, parts per million, or other calculated values for instrument calibration and evaluation as well as for precision environmental testing. This system will automatically generate manually entered humidity and temperature set points as well as user created multipoint profiles. All desired humidity’s, temperatures, flow rates, and time intervals may be programmed.

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  • 0.5% of Reading RH Uncertainty
  • Traceable to SI
  • High Flow Capability of 50 L/min
  • Based on NIST Proven “Two-Pressure” Principle
  • ControLog® Automation Software
  • Automatically Applies Enhancement Factors
  • HumiCalc® with Uncertainty Mathematical Engine
  • Generate: RH, DP, FP, PPM, Multipoint Profiles
  • Externally Driven Chamber Fan
  • 10.10” TFT LCD Touch Screen
  • Fluid Jacketed Chamber Door Option
  • Relative Humidity Range: 10 to 95 %RH, 10 to 40 L/min
  • Relative Humidity Range: 95 to 98 %RH, 10 to 20 L/min
  • Frost Point Temperature Range: –33.60 to 0 °C
  • Dew Point Temperature Range: –36.94 to 70 °C
  • Chamber Temperature Range: 4 –10 to 72 °C
  • Chamber Temperature Control Stability: 5 0.002 °C
  • Chamber Temperature Uniformity: 6 0.03 °C
  • Chamber Temperature Heating Rate: from –10 to 72 °C 0.5 °C per Minute (average)
  • Chamber Temperature Cooling Rate: from 72 to 0 °C 0.3 °C per Minute (average)
  • Chamber Temperature Cooling Rate: from 0 to –10 °C 0.05 °C per Minute (average)
  • Temperature Specification: 0.022 °C
  • Gas Type: Air or Nitrogen
  • Gas Pressure Rating: (MAWP) 175 psiG
  • Gas Flow Rate Range: 10 to 50 L/min
  • Gas Flow Rate Specification: 5% of full scale
  • Saturation Pressure Range: Ambient to 160 psiA
  • Saturation Pressure Specification: 0.02% of full scale
  • Test Chamber Pressure Range: Ambient to 17 psiA
  • Test Chamber Pressure Specification: 0.02% of reading
  • Display Resolution: 0.001
  • Test Chamber Dimensions: 12″ x 12″ x 10″ (304.8 mm x 304.8 mm x 254 mm)
  • Physical Dimensions: 22″ H x 36″ W x 23″ D (558.8 mm x 432 mm x 584.2 mm)

Humidity Sensors and Chart Recorders: Insert humidity probes through a test port in the chamber or install the sensing systems into the chamber to: determine humidity calibration accuracy and/or characterize humidity sensitivity by subjecting the humidity sensor to a variety of humidity levels; perform operational checks such as the sensing systems capability to correctly calculate and display other humidity parameters; determine the repeatability, stability, hysteresis, and drift characteristics of various humidity sensing systems.

Chilled Mirror Hygrometers: Install the actual chilled mirror head into the chamber or insert a sample tube through the test port and draw a sample through the chilled mirror head to: verify mirror temperature measurement calibration when the hygrometer is in thermal equilibrium with its environment; perform operational checks of the heat pump and optical components before and after mirror cleaning and balancing; determine whether the hygrometer is controlling the mirror deposit in the liquid phase or ice phase when operating at dew and frost points below 0 °C; determine if the hygrometer is correctly calculating other humidity parameters; determine hygrometer’s repeatability, stability, and drift characteristics.

Humidity Sensors And Chart Recorders: Insert your humidity probes through a test port in the chamber or install the hygrothermograph into the chamber and you can: determine humidity calibration accuracy and/or characterize humidity sensitivity by subjecting the humidity sensor to a variety of humidity levels; perform operational checks such as the sensing systems capability to correctly calculate and display other humidity parameters; determine the repeatability, stability, hysteresis, and drift characteristics of various humidity sensing systems.

Environmental Testing: The 2900 can serve as a test bed for evaluation and R&D of humidity sensors, humidity sensing systems, and humidity sensitive products, e.g., polymers, composites, film, magnetic medium, pharmaceuticals, soil hydrology, consumables, electronics, optics, etc.

The option available for the 2900 is the Fluid Jacketed Chamber Door (FJD).