The subject of this tender is the humidity generators listed in the specification from the manufacturer Thunder Scientific Corporation, USA.

For the calibration laboratories of the German Weather Service, which are accredited according to DIN EN ISO/IEG 17025:2018,

2 pieces of humidity generators, model 2500ST-50 incl. accessories, manufacturer: Thunder Scientific Corporation, USA

after 15 years of operation. Due to the compatibility as well as other technical specifications for the already existing calibration stations, only these devices can be considered.