The response of a pulse-operated Nickel-63 ECD to representative dissociative and nondissociative capturing compounds was studied using analog conversion of the detector signal to a linear function of sample concentration. Response curves were obtained using pulse intervals from 100 microseconds to 2,000 microseconds at various detector temperatures. At sufficiently long pulse intervals, the converted response was linear to as high as 98% of detector saturation making possible a linear dynamic range of 1 × 105.