Which of the following are disadvantages of using pocket ionization chambers as personnel monitoring devices? 1) limited dose range 2) no permanent record 3) subjective evaluation of reading by wearer.

• A. 1 and 3
• B. 1 and 2
• C. 2 and 3
• D. 1, 2, and 3

Answer: (D)

Pocket ionization chambers provide real-time dose readings, but they have notable downsides that affect their reliability as personnel monitors. The dose scale is limited, so at higher exposures the device cannot accurately measure and may saturate, making it unsuitable for large-dose situations. They do not automatically create a permanent record unless someone records the reading or the device’s data are logged elsewhere, so there isn’t an inherent archival trace unless a separate system is used. Reading the indicated dose depends on the wearer interpreting the meter, which introduces potential for human error and parallax, making the reading somewhat subjective. Because of these factors, all three statements describe genuine disadvantages.