Range 0 to 1 ppm, min detectable sensitivity .005 ppm, precision porm 1 pct., operation period w/o flow or electronic adjustment 7 days, operating temp range 10 to 40 degrees c, output 0 to 100 mv, 0 to 1 v, internal sample pump, 115 vac, 200 w, 19 in. By 12.25 in. By 20 in., front panel lamp flame off indicator