The Ultrapen PT5 DO and temperature test pen is accurate, fast and simple to use. Features include automatic correction for changes in membrane temperature; DO saturation adjustment for altitude and sample salinity; real-time readings; and three calibration methods (air, water and 0-ppm DO). The pen’s accuracy of ±0.01 ppm DO concentration and ±0.1% DO saturation, as well as its waterproof construction, make it suitable for any DO application.
