Introducing the HygroGen2
The HygroGen2 is a generator of controlled relative humidity and temperature environments, primarily for use in calibrating humidity instrumentation, but is also well suited to the calibration of temperature instrumentation, particularly those used for the measurement of temperature in air.
It is a completely self-contained, portable unit requiring no external resources except mains power. This allows technicians to perform calibrations in the laboratory, workshop or on-site.
The HygroGen2 uses a mixed flow method for generating the %rh required by the user. A desiccant cell provides a source of low humidity and a piezoelectric humidifier generates high humidity. A Peltier element is used for heating and cooling the chamber. Measurement and control is provided by a combination of a ROTRONIC HygroClip probe, an embedded Platinum Resistance Thermometer (PRT) and a multi-loop controller. Set-points are entered using the touch-screen front panel display.
Watch our video introducing the basic features and operation of the HygroGen2
Updates! New features now allow for:
- automated calibration & adjustment of HC2 probes
- extended control ranges for humidity and temperature
- remote access via most web enable devices
The HygroGen2 creates stable temperature and humidity conditions uniformly within its test chamber. Instruments under test (IUTs) are inserted into the chamber and compared to a reference to calibrate and monitor their performance so that any appropriate adjustments can be made.
There are three main relative humidity (%RH) calibration reference types that can be used with the HygroGen2. Each has its own advantages and disadvantages, so the reference chosen should be determined by the uncertainty of measurement required.
• Internal control RH probe reference
• External RH probe reference
• Chilled Mirror Hygrometer reference
Corresponding temperature references integrated in the above may be used or additional external temperature references employed (for example, platinum resistance thermometers (PRTs)).
It is vital to consider the comparison of temperatures measured by the reference, the HygroGen2 and IUTs. Because %RH is significantly dependent on temperature. Temperature measurement should be optimised to get meaningful %RH results.
The latest HygroGen2 mapping rig allows for multiple temperature sensors to be easily installed within the chamber without affecting the placement of Instruments Under Test (IUT). Live gradients ensure user can determine exact chamber gradients to ensure chamber performance.