Humidity Measurement Instrument Comparison: Why Rotronic Holds The Competitive Edge Worldwide

By Bruce McDuffee

To compare Rotronic humidity testing instruments to those of competitors, the company designed a new high-tech climate system called “The Bubbler.” The machine generates precise relative humidity levels at different temperatures and allows for simultaneous testing of multiple devices in a uniform environment. Because it offers stable temperature and humidity conditions and is large enough to accommodate a variety of instruments, The Bubbler provides a fair and impartial environment for comparison. The Bubbler is software-controlled and provides highly accurate comparisons between the varied humidity instruments tested.

In the initial rounds of testing, The Bubbler was used to analyze and compare instruments made by E+E Elektronik, Vaisala, Testo, Galtec and Rotronic. The results are summarized below.