The BK 3 Speed Drying Recorder has been used widely in the coatings industry throughout the world for several decades. A needle carrier holding six hemispherical ended needles travels the length of the six 305 x 25 mm test strips in 6, 12 or 24 hours. 

Other speeds are available to special order. 

A time scale on the side cover is graduated to suit the three different travel times.