Range 0.003 to 20.000 ppm, sensitivi type 0.001 ppm, accuracy porm 3 pct, 20 second information update interval, temperature range 0 to 50 degrees c, 110 volt, 50 to 60 hz, 75 watt power supply, digital display, physical size 15 in. Wide by 5-1/4 in. High by 22 in. Deep