BYK Byko-Test The byko-test gauge offers a unique solution to monitor environmental conditions by measuring Film thickness Fe/NFe, Dew Point, Air Temperature, and Relative Humidity all in one. There is also a dry film thickness only version available, the... MSRP: Was: Now: $849.00 Choose Options Compare Byk BYK Byko-Test MSRP: Was: Now: $849.00 Choose Options Compare Compare Selected