Oakton C-105 Colorimeter; for ozone, 0 to 4.1 ppm

These Oakton colorimeters feature a large, custom display with clear enunciators. Other features include autoranging, auto-off, and diagnostic error messages for easy use and troubleshooting. Power-saving function allows you to take 3000 readings on four AAA batteries. Colorimeters arrive ready-to-use and factory-calibrated. What's Included: three empty cuvettes with light shield caps, reagents, batteries, and hard carrying case. Great for swimming pools, spas, drinking water, public utilities, wastewater, and treated water applications IP67-rated, waterproof housing floats if accidentally dropped Uses DPD Total Chlorine reagents to test for ozone levels