What units does a radiation detection instrument measuring equivalent dose rate display?

The correct answer is based on the fact that equivalent dose rate, which is concerned with the biological effects of radiation on human tissue, is expressed in units of Sieverts (Sv). To specifically measure the rate at which this equivalent dose is received over time, the unit is modified to indicate per hour, resulting in Sieverts per hour (Sv/hr). This allows for the assessment of potential biological harm from radiation exposure in a time-sensitive manner.

While millisieverts (mSv) are a valid unit for measuring equivalent dose, they are generally used for total dose rather than a rate. The units Gray (Gy) and rads measure absorbed dose rather than equivalent dose, and they do not provide information on the biological effect of that radiation exposure per unit of time. Thus, focusing on the specific measurement of equivalent dose rate confirms that the appropriate unit is indeed Sieverts per hour.