Since its launch the portable Rotronic HygroGen has defined the standard for portable humidity and temperature multipoint calibration systems. Hundreds of users worldwide have identified that this instrument for the rapid generation of stable temperature and humidity conditions can save significant amounts of time in performing the calibration of all types of humidity instruments from all manufacturers. The HygroGen2 satisfies the stringent demands of quality and compliance regulations with its ability to calibrate instruments over their full working range, and is embraced throughout the pharmaceutical industry in particular as the leading instrument in its class and is favored in ISO 17025 humidity calibration laboratories around the world. Being portable and robust, it can be quickly set up at the installation location allowing for complete system qualification. The rock solid stability, minimal thermal gradients, and rapid time for set-point changes of the HygroGen2-S are now replicated in a new family member: HygroGen2-XL humidity calibrator, which boasts a chamber with 10 times the capacity. Especially in the pharmaceutical industry, the HygroGen2 offers some outstanding advantages thanks to the outstanding accuracy. Both HygroGen2 models have a standard temperature control range of 0…60 °C and humidity range of 5…95 %RH. Optional range extensions are available.