Ozone exposure locker. A) Illustration of the ozone exposure locker. Apparatus: A, thermohygrometer (upper); B, ozone meter (upper); C, thermohygrometer (lower); D, ozone meter (lower); E, ozone generator. B) Illustration of the ozone exposure of the gown in the locker. Apparatus: A, thermohygrometer (upper); B, ozone meter (upper); C, thermohygrometer (lower); D, ozone meter (lower); E, ozone generator. Ozone indicator: 1, upper air; 2, lower air; 3, abdominal of outer gown; 4, right sleeve of outer gown; 5, left sleeve of outer gown; 6, abdominal of centre gown; 7, right sleeve of centre gown; 8, left sleeve of centre gown.