The portable UltraShock from MadgeTech Inc., Warner, NH, measures and records peak shock, temperature, humidity, and ambient pressure over a user-defined interval. The device samples at 512 Hz and stores peak shock values for a selected interval from 64 readings/s to 1 reading/5 min. and temperature, pressure, and humidity at a rate of 2 s max. It can store >174,000 readings/channel. The 12 oz., 1.0 by 3.5 by 4.4 in. device is powered by a 9 V battery. Windows-based software collects, displays, and analyzes data.