Integrating pulse discharge ionization chambers have been successfully used as detectors for portable dose integrators, environmental area monitors, and for high energy pulsed accelerator monitoring systems. The ion chamber physically consists of a pressure vessel, internally mounted gas discharge tube, capacitors, anode support structure, and optional polyethylene inner lining. Chambers are available with argon, freon, or ethylene gas filling to about 10 atm. Gamma sensitivity depends on the filler gas, liner, and internal capacitance and may range from 2 × 10 −4 to 5 R/pulse. The gamma and neutron energy response characteristics of freon and ethylene chambers together with rate dependence effects, have been investigated and are discussed. Detailed consideration of chamber characteristics is justified by a general lack of this information from either the maker or other investigators. A transistorized, portable, dose integrator, with adjustable alarm level, has been developed as an aid in controlling mission exposure to either gamma or mixed field radiation. The device can be set to alarm at any absorbed dose between 0.25 and 600 mrad in increments of 0.25 or 0.6 mrad. Cosmotron area monitoring consists of a sixteen channel system designed to alarm above about 1.2 mrem/h. In each channel pulses are integrated on two registers, one resettable after appropriate data recording, and the other continuously running.